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Today in New York Weather History: February 27

 

1873 (Thursday)

A snowfall of four inches was the fifth this month of two inches or more.  (The month's total snowfall amounted to 18.9".)  This was the first time measurable snow fell on this date and, 151 years later, the amount that fell is still the most on this date.

 

1910 (Sunday)

Today's high of 51° was the first in the 50s since Dec. 14, a span of nearly eleven weeks.

 

1926 (Saturday)

Today's high of 33° was the ninth this winter, tying the winter of 1905 for the most 33-degree highs.  (February also had eight days with highs of 32° or colder.)

 

33degrees

 

1940 (Tuesday)

Two inches of snow fell during the afternoon and evening.  This was the last time an inch or more of snow fell on this date (through 2024).  It was also quite cold, with a high/low of 28°/16°, tying it with the previous day (high/low of 29°/15°) for coldest mean temperature this month.

 

1981 (Friday)

In the past twelve days, the mean temperature was 15 degrees above average (high/low of 55°/43°).

 

1988 (Saturday)

It was a raw Saturday, with periods of wet snow that accumulated 0.6".  This would be the last measurable snowfall of the winter.  In total, eighteen inches of snow fell during the winter (eight inches below average). 

 

1992 (Thursday)

Morning lows of today and the previous three days were: 36°-35°-34°-33° (today).

 

1996 (Tuesday)

It was a month of wild temperature swings, and today was the seventeenth day in which the mean temperature was either ten degrees or more above or below average.  Today, with a high of 58°, was the ninth day in a row that was ten+ degrees above average.  (After the first week of the month was 13 degrees colder than average, the last ten days of the month were 12 degrees above average.)

 

1997 (Thursday)

Today's high of 72° (twenty-eight degrees above average) was the third record high in the past nine days, but it was just two days after a low of 19°, which came three days after a high of 69°.   At the time, this was the third mildest February (it's since fallen to tenth mildest).

 

Up_down_arrows

 

2002 (Wednesday)

Light showers late in the morning amounted to 0.05" and brought February's total precipitation to 0.71", making it the driest February since 1901, and third driest on record.  (It would also be the third mildest February - now ranked seventh).  

 

2013 (Wednesday)

A nor'easter lashed the area overnight with howling winds that gusted between 40-50 mph throughout the region.  By the time the storm moved out late this morning, 1.54" of rain had poured down.  This was a record amount for the date, breaking the old record from 100 years ago.   

 

2023 (Monday)

The second measurable snowfall of the winter (the first, a mere 0.4", was on 2/1) began this evening and brought 1.8" of snow (half of it fell today, the other half in the overnight hours).  Three to seven inches fell in outlying suburbs, where temperatures were colder.  This would be the most significant snowfall of what became the least snowy winter on record.

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January 2024 Weather Recap: A One-Week Taste of Winter

 

One out of four

 

Historically, there has often been a period in late January referred to as the "January Thaw", when a brief respite from winter's cold took place.  This year, however, New York experienced the reverse, as there was a "January Freeze" between January 15 and 21.   The average high/low during this freeze was 30°/21°, with six of the seven days having a high of 32° or colder.  

 

This period was seven degrees below average; meanwhile, the rest of the month was seven degrees above average.  This produced a temperature for the entirety of the month that was 3.3 degrees above average, making January 2024 the 25th mildest January on record.  While the month's average high was 2.5 degrees above average, the average low was 4.0 degrees above average (ranked by average low, January 2024 was 17th mildest).

 

During the January freeze, Central Park had the winter's first day with a high of 32° or colder, the second latest date for this occurrence (behind the winter of 1987). 

 

Although it was on the mild side, this January was 6.5 degrees colder than last January (which was the mildest on record).  

 

With 5.28" of precipitation, January 2024 was the wettest January of the century (and 21st among all Januarys).  Two-thirds of its rain was from three storm systems: 1.95" on 1/9-10; 0.89" on 1/12-13, and 0.87" on 1/28-29.  The rainfall on 1/9 was a record amount for the date. 

 

Adding January's precipitation to that of December's 6.71" made this the wettest Dec/Jan combo since 1978-79, and the seventh wettest Dec/Jan on record (with an amount that was 50% above average).  

 

Clipart - Most Dec-Jan Rain

(Note: If the chart above excluded precipitation that was snow, Dec/Jan of 2023-24's rank would rise to fifth, passing 1948-49 and 1977-78 (which had 27.1" and 20.7" of snow, respectively, while 2023/24 had just 2.3".

 

January's mildest reading was 60° (on 1/13), coldest was 17° (on 1/17).  The Arctic high that delivered this frigid cold to the Rockies, Plains, Midwest, Great Lakes, and the South, gave New York just a glancing blow.  Nine days had readings of ten degrees or more above average, two were ten or more below average.

 

The biggest snowfall was 1.7" on Jan. 15-16.   The 0.2" of snow that fell on 1/6 was the first measurable snow this winter and one of the latest dates for the first such snowfall.  In total, 2.3" of snow fell in January, which was the amount of snow that fell during the entirety of last winter.

 

Finally, the last nine days of the month were all overcast.

 

Here are recaps of weather in January from previous years:

2023

2022

2021

2020

2019

2018

2017

2015

2014

 

 

 


Rundown of 2024 Weather Highlights

 


2024

 

JANUARY

6 - The first measurable snow of the winter, 0.2", fell early in the afternoon, but was quickly washed away by rain.  The day's high/low was 37°/31°.  This snowfall was about three weeks later than the average date of Central Park's first measurable snowfall, but it was four weeks earlier than last winter's first snowfall (0.4" on 2/1, which was the latest date on record for the first measurable snowfall ).

9 - After a sunny morning, a powerful storm system affecting the South, Midwest, and Ohio Valley moved into the New York area, bringing strong winds gusting between 35-45 mph, and a hard rain after dark.  The 1.73" of rain that fell today was a record amount for the date (rain after midnight added 0.22" to today's total).  The day's high of 57° was reached as midnight approached, and was the mildest reading since 12/18. 

15 - With a high of 29°, today was the first day this winter with a high of 32° or colder, which was about four weeks later than the typical date for this occurrence.  Only the winter of 1987  had a later occurrence - on 1/20 (the winter of 1975's first occurrence was on 1/14).  Light snow moved in after 9 PM and accumulated 0.4" by midnight (an additional 1.3" fell the next morning). 

21 - This was the sixth day of the past seven to have a high of 32° or colder.  (Last winter had four such days in total.) After highs and lows averaged 46°/34° during the first two weeks of January, the seven days that followed averaged 30°/21°.  Although this was cold, it was just a glancing blow from an Arctic high pressure system that poured frigid cold into the Midwest, Great Plains, and the South (Central Park's coldest reading was 17°).  

28 - It was a rainy and raw day.  0.82" of rain fell (most of it in the morning) and afternoon temperatures were in the upper 30s.  Today's rainfall brought the month's total precipitation to 5.23", tying it with January 2015 as the wettest January of the century (with 0.05" of rain tomorrow, the tie would be broken). 

31 - The morning lows of today and the three previous days were: 37° (1/28)-36°-35°-34° (today).  And this was the ninth consecutive day with overcast skies.  

 

FEBRUARY

3 - At long last, after suffering through 11 days in a row of overcast skies, today featured wall-to-wall sunshine under clear skies.  And the day’s low of 32° was the first of 32° or colder since 1/22 as well.  Another streak, however, continued as today, with a high/low of 43°/32°,  was the twelfth day in a row with above average temperatures (averaging eight degrees above average).

13 -  A morning snowfall of  3.2" accumulated in Central Park, an accumulation that was likely reduced because the temperature remained above 32° all morning (the amount of liquid measured was 0.77").  Late in the afternoon the sun came out and the mercury rose to 41°. 

Although NYC had one of the smallest accumulations from today's storm, the amount was the biggest accumulation in temperatures above freezing since April 2, 2018 when 5.5" fell (high/low was 43°/33°; today's was 41°/33°).

14 - With a high/low of 38°/29°, today's mean temperature was slightly below average, breaking a 22-day streak of above average temperatures.  In this century, only the winters of 2023, 2016, and 2007 have had longer streaks (36, 34, and 32 days, respectively).

25 - Today's low of 23° was the coldest reading of the month, making it the mildest coldest reading of any February (the previous mildest coldest reading in February was 22° in 1927).  On average, the coldest reading in February is in the low teens (last February it was 3°).  


A Look Back at 2023's Weather - New York's Warmest Year on Record

 

Trophy

 

Despite a summer with temperatures that were slightly below average, 2023 unseated 2012 as New York City's warmest year on record.  What captured the crown for 2023 were four very mild months: January (mildest on record, 9.8 degrees above average); February (third mildest); April (second mildest); and December (second mildest). 

 Chart - 2023 became NYCs warmest year

Although 2023 had the warmest average temperature on record (i.e., the average of the high and low), it ranked third for average high (behind 1991 and 1990). 

  Chart - 5 warmest years by temp  high  low (2023) 

Not only was the year very mild, it was also a wet one, the eleventh wettest on record, with 59.26" measured (2021 is ranked tenth, with 59.73".)   Rainfall was nearly ten inches above average (and thirteen inches more than 2022).  This ten-inch overage was largely due to September, which had 14.25" of rain - the fourth greatest monthly amount on record.  

 

Despite the excessive precipitation, consistently mild wintertime temperatures (third mildest winter on record) weren't conducive to snow, and the 2.3" that fell (from three snowfalls of 0.4", 1.8", and 0.1") was the smallest amount Central Park reported for any winter.  The previous winter with the least snowfall was 1972-73, with 2.8" (average winter snowfall is about 26"). 

 

The year had four months with 6.50” or more of rain: April (7.70"); August (6.56"); September (14.25"); and December (6.71").  These four months accounted for 60% of the year's precipitation.  Only five other years have had this many months with 6.50" of precipitation (2018, 2007, 1989, 1983 and 1901).  

 

Despite 2023 receiving ten inches more precipitation than average, it was the eleventh year to have three months in the first half of the year with less than two inches of precipitation.  February and May were the driest months of the year, with both receiving just 1.28”.  And June wasn't far off, with 1.62".  

 

There were 12 days with highs in the 90s in 2023, the fewest since 2014, which had eight (average is 17 days).  The year's hottest temperature was just 93°; the last time a summer had a hottest reading this "cool" was in 2014.  Additionally, June had the fewest highs in the 80s since June 1985, and August was the first since August 1986 to have no readings in the 90s.  But while the number of days in the 90s was well below average, the number of lows in the 70s was well above average (50). 

 

Here are some other interesting aspects of 2023:

  • Every day in January had above average temperatures.
  • The winter of 2023's first measurable snow didn't happen until 2/1, the latest date for this occurrence of any winter.
  • April 2023 became  just the sixth April to have two days with highs in the 90s.  And the low of 70° on 4/14 was the earliest reading in the 70s on record.
  • The year's first reading in the 90s was very early, on 4/13, and the last reading in the 80s was very late, on 10/28.
  • 2023's hottest reading of 93° was three degrees cooler than the typical hottest reading of a year, and the year's lowest temperature, 3° on 2/4, was six degrees colder than the typical coldest reading of a year. 
  • A typical year has 70 days with lows of 32° or colder, but in 2023 there were only 28 such days.  And there was just one day with a high of 32° or colder (the average is 18 days).
  • Three inches of September's rain fell in an hour on 9/29 (during a rainstorm that dumped 5.48" in total).
  • The first three weeks of April had just 0.40" of rain, but the month ended up being the seventh rainiest April after 7.30” fell in the last nine days of the month.  The rain was from three rainstorms, each producing more than two inches of rain.
  • Smoke from forest fires in Canada choked the area in an orange-colored haze during June 7-8 and again on the last three days of the month (but it wasn't as bad as the first round).


Orange new york haze-breslov institute

 

Here are recaps of previous years:

2022

2021

2020

2019

2018

2017

2016

2015

 

 


Disputing Central Park's Last 1-Inch Snowfall

 

 Snowfall

 

For the past month I've been scratching my head over the National Weather Service and The Weather Channel touting that Central Park hasn’t had a snowfall of an inch or more in nearly two years (since Feb. 13, 2022).  But that’s simply not true, and their observation appears to be based on a flawed understanding of what a "snowfall" is.

 

Last winter, Central Park had a snowfall of 1.8” on Feb. 27-28, with 0.9” falling on 2/27 (in the evening) and another 0.9” on 2/28 (in the wee hours of the morning).  As I see it, the entirety of the snow event determines a snowfall amount, not the confines of a calendar date.  (Snowflakes don’t abide by boundaries of calendar dates, as half of significant snowfalls since 1950 have begun on one date and ended the next day.)

 

Many of us are well aware that last winter was the least snowy on record, so scraping together an artificial factoid isn't needed for us to appreciate the lack of snow in New York. 

 

 

1.6 inches of snowWRONG!

 


December 2023 Weather Recap: 2023 Ends with New York's 2nd Mildest & 9th Wettest December

 

Dec 12 - xmas bells2

 

December 2023 became New York's second mildest December on record and its ninth wettest.  But despite it being such a mild month (5.5 degrees above average), the warmest temperature of the month was just 62° (on 12/18), which is typical for December’s mildest reading.  However, the month’s coldest reading, 25° on 12/22, was seven degrees milder than the typical coldest reading.

 

Chart - 5 mildest december (as of 2023)

 

December had 6.71” of rain, making it the fourth month of 2023 with 6.50” of rain or more, something that’s happened in just five other years (2018, 2007, 1989, 1983 and 1901). 

 

Chart - 2023 wettest months

 

After the coldest reading of the month on 12/22, 25°, the rest of the month had no readings of 32° or colder.  The average low between 12/23-12/31 was 42°, eleven degrees above average.

 

There were ten days with a mean temperature 10 degrees or more above average.  The most above average day was 12/28 which was 16 degrees above average (high/low of 55°/49°).   Only six days were colder than average.  The chilliest day was 12/22, with a high/low of 37°/25° (six degrees below average).

 

Three rainstorms produced more than 1.50” of rain.  They accounted for 5.68” of the month’s 6.71” of rain.

  • 1.67" fell on Dec. 10-11
  • 2.47" fell on Dec. 17-18 (2.21" on 12/18 set a record for the date)
  • 1.54" fell on Dec. 27-28

 

Like last year, November and December of this year had only a trace of snow in Central Park, joining the winters of 1971-2 and 1972-73 as the only back-to-back winters with no measurable snow in Nov/Dec.

 

March and December had the same average temperature, but December’s was 5.5 degrees above average while March’s was 1.8 degrees above average.  And while December 2023 was the second mildest on record, March was the 25th mildest.  Finally, December had twice as much rain as March.

 

Chart - dec and mar 2023

 

Here are recaps of previous Decembers:

2022

2021

2020

2019

2018

2017

2016

2015


November 2023 Weather Recap

 

November 2023

November 2023 was 1.3 degrees chillier than average.  And while its average high was just 0.7 degree below average, the low was 2.0 degrees colder than average.

 

Almost all of the month's interesting aspects (i.e., biggest rain event, mildest and coldest temperature) occurred in the last ten days of the month.

 

Most of November’s 2.95” of rain (somewhat below average) fell during 11/21-22 when 2.52” poured down (much of it on the 22nd, which was the day before Thanksgiving).  This was the biggest November rainstorm in seven years.  It soaked the area after just 0.07” was measured in the first 20 days of the month.  This November’s total rainfall was close to last November, which had 3.15”.

 

Chart - Lengthy  Dry Starts to November

 

The fall’s first low of 32° or colder occurred on 11/25, which was four days later than the average date for this occurrence.

 

The month’s coldest reading was 27° (on 11/29), which was also Nov. 2022’s coldest reading.  However, this November’s mildest reading of 67° was ten degrees cooler than last November.

 

Finally, temperatures on the Sunday of the NYC Marathon (11/6) and on Thanksgiving Day (11/23) were very similar, with highs and lows of 56°/44° and 52°/44°, respectively.  And neither day had any rain. 

 

Here are recaps of NYC's previous eight Novembers:

2022

2021

2020

2019

2018

2017

2016

2015

 


October 2023 Weather Recap: Warm Beginning & End

 Autumn in new york

October 2023 was was 2.6 degrees warmer than average.  It was the fourth mildest October in the years since 2000 and the 20th mildest since records began in 1869.  The first week of the month was seven degrees above average; Oct. 27-30 was 14 degrees above average.  These 11 days were 10 degrees above average; the rest of the month was one degree below average. 

 

Three days had highs in the 80s: 10/3, 10/4, and 10/28.  The warmest reading of 83° on 10/4 was the warmest reading in October since 2019.  And the high of 80° on 10/28 was Central Park's latest reading in the 80s since 1993 when it occurred on 11/15.  (Average date of the last high of 80+ is 9/28.)

 

After 14.25" fell in September (the fourth rainiest month on record), October dried out and had about ten inches less.  Although the 3.90" that was measured was slightly below average this was the driest October since 2018.  Much of of the month's rain came from three storms between 10/14 and 10/30: 0.81" on 10/14;  1.51" on 10/20-21; and 1.06" on 10/29-30.

 

In addition to October 2023, October 1936 also had 3.90" of rain.  And five other Octobers had very similar amounts.  In 1987, October had 3.89"; October 2015 had 3.91"; October 1973 had 3.92"; October 1979 had 3.87"; and October 1980 had 3.86".  

 

Chilliest day of the month was on 10/31, with a high/low of 51°/45°.  Only October 2021 had a milder "chilliest" reading in October (47°).

 

Halloween

Here are recaps of previous Octobers:

2022

2021

2020

2019

2018

2017

2016

 

 


September 2023 Weather Recap: 2nd Rainiest September on Record

  Sept 29 2023 rainstorm_map1-abc-ml-230929_1695989164289_hpEmbed_16x9

After a very warm and dry start, September 2023 ended cool and very wet.  The six-day period Sept. 3-8 all had highs of 88° or hotter, with an average high of 91° (eleven degrees above average).  Then the eight-day period Sept. 23-30 all had highs of 66° or cooler, with an average high of 64° (eight degrees below average).  Temperature-wise, the two periods balanced each other out and the month ended up with a close to average temperature (+0.2 degrees above average). 

 

After having no days in the 90s in August, September had four, the most in September since there were six in Sept. 2015.  The four days in the 90s were consecutive, making this the only heat wave of the year.  And with highs of 93°, Sept. 6 and 7 tied July 5 for hottest reading of the year.  (9/6, with a high/low of 93°/77° had the hottest mean temperature of the year.) 

 

Despite there being no measurable rain in the first week of the month, September 2023 ended up being the second rainiest September on record with 14.25" measured  (September 1882 had 16.85") - and the fourth wettest of any month.  More than half of the rain (8.90") fell in the last eight days of the month. (This amount alone would have made it the 10th wettest September.)

 

Chart - 5 rainiest months on record

 

Five days had more than an inch of rain (and another had 0.96"), the most in one month since August 2011 which had six.   The rainstorm of 9/29 produced 5.48" of rain (much of it in a 3-hour period), the ninth greatest amount to fall on a calendar date.  Tropical storm Ophelia impacted NYC's weather for four days (9/22-9/25) and produced 3.00" of rain, close to what fell in just two hours on 9/29.

 Chart - Sept 2023 Daily Rainfalls of 1 Inch or More

The last 16 days of the month all had below average mean temperatures, the longest below average streak since April 2020, which also had a 16-day streak in the month's last 16 days (a streak of 22 days, occurred in March 2018).  Additionally, the last eight days all had highs in the 60s, the longest such streak in September in the years since 1960 (the coolest reading of the month, 50°, was reported on 9/27).  For the entire month there were 10 days with sub-70 highs, which was the most in September since 2006.  

 

In total, there were 12 days with highs in the 90s in 2023, the fewest since 2014, which had eight.  The last time a summer had its hottest reading at 93° or cooler was in 2014 when it was 92°.

 

Of the 23 years in which August had no readings in the 90s, September 2023 had the second most highs in the 90s (Sept. 1915 had the most - five)

 

Here are recaps from nine previous Septembers:

2022

2021

2020

2019

2018

2017

2016

2015

2014


August 2023 Weather Recap: Protective Bubble Keeps Searing Heat Away From NYC

 

Protective bubble

 

Compared to other regions of the US, New York continued to be blessed by relatively mild summertime temperatures.  August was 1.1 degrees cooler than average and was the first August since 1986 not to have any reading in the 90s.  (By contrast, last August was the third hottest on record, with 11 days having highs in the 90s.)  It was the coolest August in six years (and the summer of 2023 was the coolest in six years as well).

 

The month's hottest reading was 88°, which occurred twice (on 8/13 and 8/21).  The last time the warmest temperature in August was 88° (or cooler) was in 1963 (the coolest warmest temperature of any August is 83° in 1927).  The warmest stretch this month was the four days between 8/11-14 with highs of 85°-85°-88°-87° (just slightly warmer than average).

 

Chart - chilliest warmest reading in aug

This was the tenth year in a row in which August’s coolest temperature was 60° or milder (63°).  Only five Augusts have had their coolest reading milder than this August.  However, the ten days with lows of 70° or warmer was below the average of 14 for August.  (This was after July had 24 such lows, third most on record for that month.)

 

Chart - mildest chilliest reading in aug

The most above and below average daily mean temperatures were in a narrow range of just +/- five degrees.  The coolest and warmest temperatures in August were just 25 degrees apart (63° and 88°), which is the narrowest range on record for the month of August (average is 34 degrees, 60° and 94°).  This followed July, which had the third smallest temperature range for that month (66° and 93°).  

 

6.56" of rain fell in Central Park, making this the 29th rainiest August (this was after no measurable rain fell in the first six days of the month).  This was the second greatest amount this year (behind April's 7.70").  Much of the month’s rain (nearly five inches) fell during relatively brief downpours between 1 AM and sunrise on six days.  The biggest deluge was 1.25" that fell between 3:30-5 AM on 8/16.

 

Here are monthly recaps for past Augusts:

2022

2021

2020

2019

2018

2017

2016

2015

 


July 2023 Weather Recap: Consistently Warm Rather Than Excessively Hot

 

 July 30 - purple flower

 

This post may be one of the few weather-related articles that doesn't hyperventilate about hot weather in the middle of summer.  And despite New York's news media hyping the term "heat dome" any time the local forecast called for a high approaching 90°, just five days in July had highs in the 90s in NYC, and there were no heat waves; the hottest reading was just 93°.  Globally, July was the hottest month on record, but that wasn't the case in Central Park as it was the 20th warmest July (average high/low was 86.4°/71.7°, 1.5 degrees above average).  

 

Every day but one had a high of 80° or warmer (the typical number of days in July with highs cooler than 80° is six), comparable to last July which had no such days.  As for low temperatures, this July and July 2022 both reported 24 days with lows in the 70s, tying three other Julys for third most (July 2020 had 26, 2010 had 25).  Although it had a below average number of days in the 90s (five versus seven), July 2023 had an above average concentration of highs that were 88° or 89°, with ten counted.

 

July was slightly wetter than average, with 5.34" measured.  This was almost double what fell in May and June combined (which had 1.29" and 1.62", respectively).  More rain fell in the first four days of July (1.66") than what fell in all of June.  This included 0.63" of rain that fell on 7/4, the most on Independence Day since 1981 (when 1.76" fell).   

 

The month's greatest daily rainfall was 1.32" on 7/16 (0.91" of it fell between 11 AM and 1 PM); this daily total was more than what fell in all of April.  On that day, which had a low of 74°, the high reached just 78°, which is the coolest high temperature ever reported with a low this warm.   

 

Only five days had below average temperatures, all of which occurred in the second half of the month.  Meanwhile, seven days were five or more degrees above average.

 

July's temperature range was only 27 degrees, from 66° to 93°.  This compares to an average range of 34 degrees (62° to 96°).  Only one other July has had a smaller range (2004's 24-degree range).

 

Although there were no heat waves, there was a streak of eight days with highs of 85° or warmer (July 22-29).  Finally, high dew points were a consistent feature of July as two-thirds of the days in July experienced dew points of 70° or warmer, giving the air an uncomfortable, tropical feel. 

 

Here are July recaps from previous years:

July 2022

July 2021

July 2020

July 2019

July 2018

July 2017

July 2016

July 2015

July 2014