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May 2024 Weather Recap: Mild Nights, Average Rainfall

 

May stock photo-masalskaya

 

May 2024 was 1.8 degrees warmer than average, its rainfall of 4.11" was slightly above average.  This was the sixth consecutive month with above average temperatures and it was the 24th mildest May on record; however, it ranked eighth based on average low (which was 2.4 degrees above average), but ranked 41st based on average high (1.1 degree above average).

 

The highlight of the month was a seven-day streak (May 22-28) with lows of 65° or milder, the longest streak of its kind in May on record.  For the entire month there were eight days with lows of 65°+, the second most on record (tied with May 1908 and one fewer than May 1880).  Interestingly, no lows were in the 70s (41 Mays have had one or more ).  During this streak the temperature was eight degrees warmer than average.  (The rest of the month had average temperatures.)

 

Chart - may longest streaks of 65 or warmer lows

 

On average, May’s warmest temperature is five degrees above April’s (88° vs. 83°), but this May's warmest reading of 84° (which happened on three days: 5/8, 5/22, and 5/24) was three degrees below April’s hottest temperature.  It joined twenty other Mays that had their warmest reading cooler than April's (including last May).

 

The month's coolest reading was 47° on 5/11.  Only seven Mays have had a milder reading as their chilliest (including last May); in those years the reading was either 48° or 49°.  Four other Mays have had their coolest reading also be 47°. 

 

Between 5/23 and 5/30, 2.59” of the month’s 4.11” of rain fell.  0.96" of this amount fell on Memorial Day from downpours shortly after daybreak and during mid-afternoon, making it the rainiest day of May, and the eighth wettest Memorial Day of them all.  On 5/23 the day's 0.78" of rain fell mostly between 9:30 and 11 AM (resulting in ground stops at the area's three major airports).

 

Although Memorial Day had two downpours and overcast skies, the Saturday and Sunday of the holiday weekend had sunny skies and summer-like highs/lows of  81°/66° and 82°/65°, respectively 

 

Here are past recaps of May's weather going back to 2015:

2023

2022

2021

2020

2019

2018

2017

2016

2015


April 2024 Weather Recap: A Near-Miss For Top-10 Mildest

 

Apr 28 - westside hwy

 

March’s very wet conditions (the fourth wettest March on record) continued into April as 2.64” of rain fell during its first four days.  But despite the wet start, the month's total rainfall ended up being below average (3.47") as just 0.83” fell after 4/4 (and only 0.14" in the second half).

 

April 2024 was 1.9 degrees above average and was the 11th mildest April on record (tied with 1994).  The warmest reading was 87° on 4/29.  This reading joined two other days with highs of 80+ earlier in the month (80° on 4/9, 82° on 4/15).  And one day had a high of 79° (4/28).

 

Like April 2023 (the second mildest April on record), this April's chilliest reading was 37° (on 4/4).  Only four other Aprils have had a milder coldest reading: 42° in 1878 (on six days); 40° in 2010; and 38° in 2012 and 2022.  April 2024 is one of seven Aprils whose chilliest reading was 37°.

 

The day of April's warmest high temperature also featured the year's first low in the 60s (63°).  This was close to the typical date for this occurrence.

 

Usually the metro area's three major airports report higher wind gusts than Central Park, but during the nor'easter that lashed the City on 4/2, Central Park clocked the highest gust.  And at 59 mph, it was the highest there since superstorm Sandy in Oct. 29, 2012.  

 

Finally, as April came to a close, April 28 reported 0.01” of rain, 4/29 had 0.02”, and 4/30 had 0.03”.

 

Here are previous recaps from April:

2023

2022

2021

2020

2019

2018

2017

2016


March 2024 Weather Recap: 4th Wettest, 8th Mildest on Record

 

Mar 16 - abington square dafs

 

March 2024 was 5.3 degrees warmer than average, becoming the eighth mildest March on record (just 0.1 degree milder than March 2020).  It was the fourth month in a row with above average temperatures; combined, they were 4.6 degrees above average. 

 

Not only was March on the mild side, it was very rainy, with 9.06" was measured in Central Park, making it the fourth wettest March on record.  Half of this amount fell in the first nine days of the month - the wettest first nine days of March on record.  The month had four days with an inch or more of rain.  By far the rainiest was 3/23, which had 3.66", a record amount for the date.  

 

The first nine days and last nine days of the month had equally excessive amounts of rain, while the middle 13 days picked up just 0.04".

Chart - march 2024 rainfall in 3 parts

Ten days were 10 degrees or more above average (six were consecutive, March 12-17).  Only six days were colder than average (five were consecutive, March 21-25).

 

The coldest high temperature in March was 43° (on 3/21), which was the mildest coldest reading of any March on record.  (The coldest high in March is typically around 33°.)  FYI, February 2024 had February's mildest coldest high (36°).

 

Like last March, March 2024's coldest low temperature was 29°, which occurred on 3/22.  Only three Marches have had a milder coldest low: 1942 (33°); 1871 (31°); and 1973 (30°).

 

Each of the first 18 days of the month had an above-average mean temperature; these days were nearly ten degrees milder than average.  (Temperatures during the remainder of the month fell back to earth and were about one degree below average.)  March 12-17 was 15 degrees above average (averaging a high/low of 67°/47°), including back-to-back days with highs in the 70s (74° on the 14th, 73° on the 15th).  Although neither reading was a record, the high of 68° on 3/3 was.

 

March had no measurable snow, making it the 23rd March with no accumulating snow reported.  (Since 2000, March has averaged four inches of snow.)

 

St. Patrick's Day and Easter Sunday (which fell on 3/31) both featured fair skies and had highs/lows that were very similar: 63°/48° (13 degrees above average), and 62°/47° (seven degrees above average), respectively.  However, the Mets weren't as fortunate, as its home opener (on 3/28) was postponed due to chilly and rainy conditions.  And the following afternoon, when the game was rescheduled, high winds were an issue (gusts were between 30-40 mph).

 

Finally, 10 days had very low humidity (i.e., 25% or lower).  The lowest reading was 15% during the afternoon of 3/11.  For the tenth time this century low humidity was reported on March 30 (bottoming out at 16% late in the afternoon) - the most of any calendar date. 

 

Here are previous March recaps:

2023

2022

2021

2020

2019

2018

2017

2016

 


February 2024 Weather Recap: Mild, on the Dry Side

 


Feb 2024 calendar

 

February 2024 was 4.2 degrees milder than average, becoming New York's 10th mildest February (and the fourth Leap Year February to rank among the 10 mildest Februarys).  Following a January that was 3.3 degrees milder than average, and a December that was +5.5 degrees, these three months produced the fourth mildest meteorological winter on record.  And it followed the third mildest winter last year.

 

Additionally, the number of days completely above freezing this winter, 59, was the second most of any winter.  The most?  Last winter, which had 60 days. (The average number is 36 days.)

 

Chart - 5 mildest winters (including 2023-24)

The month’s coldest and warmest readings occurred three days apart.  The coldest reading, 23° on 2/25, was the mildest coldest reading on record of any February.  (February’s coldest reading is typically in the low teens; last year it was 3°).  The month’s mildest reading, 62°, happened during the night of 2/28.  This was the 14th February to have this reading as its mildest temperature, tying it with 58° as the most-occurring mildest reading in February.  (Also on the night of the 28th, Central Park clocked a wind gust of 49 mph as a cold front passed through.)  

 

Not only was the coldest low temperature not very cold, neither was the coldest high.  On average, the coldest high in February is 26°, but this February it was 36°, the mildest coldest high on record.  (Before this year, the mildest coldest high in February was 33°, in 2002, 1998, and 1997.)

 

The month was among the top 20% driest Februarys, with 2.05” of precipitation measured (making it the 31st driest February).  More than half of the precipitation fell on two days, 0.77” on the 13th and 0.52” on the 28th

 

The month had 5.2” of snow, which fell on 2/13 (3.2") and 2/17 (2.0").   Of the four weather stations in the metro area, Central Park reported the smallest amount, as 10.4" fell at JFK, Newark had 9.1”, and LGA measured 6.6”.  Although JFK and CPK had comparable amounts of liquid (0.98” and 0.95”, respectively), JFK had twice as much snow.

 

Feb 17 snowfall

 

Like January, February had one week that was on the cold side (but not quite as cold as January's).  While Feb. 14-20 was two degrees colder than average, the month's other three weeks were six degrees milder than average.

 

Finally, a streak of 22 days with above average mean temperatures ended on 2/13.  Only three other streaks this century have been longer.

 

Here are other February recaps:

2023

2022

2021

2020

2019

2018

2017

2015

 


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

 

 

 


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