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A Look at New York City's Hottest Weekends of All Time
Central Park's Puzzling, Flawed Weather Station

July 2020 Is Seventh Hottest; Drought Eases Up

Seventh place

 

Following a June that was 2.3 degrees warmer than average, July 2020 was even more above average, +3.5 degrees, with an average high/low of 87.4°/72.6°.  The month's average temperature of 80.0° made it the seventh hottest July on record.  July records were set for mildest reading for coolest low temperature (67°) and the most lows in the 70s/80s (26).  Additionally, it joined eight other Julys with 14 or more highs of 90° or hotter.  Low temperatures were instrumental in placing the month so high in the rankings as it was third warmest in that category while the average high was ranked sixteenth.  Precipitation was also a significant story as the 6.58" that fell made this the wettest month of the year, so far, and the wettest of the 15 hottest Julys (July 2019 previously held that distinction).  Tropical storm Fay contributed a significant portion of the month's rainfall.

 

As mentioned above, July had 14 days with highs in the 90s, the most since 2010.  This included two five-day heat waves.  Despite the large number of hot days the heat wasn't overbearing as only one day had a high of 95° or hotter (96° on 7/6).  This was the fewest of any July among the 10 hottest.  However, there were nine days with lows of 75°+ (tied for fifth most of any July), including two in the 80s (the counterpart to high temperatures in the triple digits).  And of the six days with below average mean temperatures, just one of them had a low temperature that was cooler than average.

 

Highline during covid-19
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After an exceedingly dry May and June, with both months reporting less than two inches of rain, July had 6.58", making it the wettest month so far this year (nearly double the combined rainfall of the preceding two months).  More than half of the rain was from tropical storm Fay on 7/10 (2.54") and a severe thunderstorm the evening of 7/22 that dumped 1.23" in an hour.  (Newark Airport, just 20 miles to the west, was much rainier, with 11.17" measured - its wettest July on record).

 

Chart - july 2020 top 10 julys

 

Finally, June and July 2020 were the seventh warmest June-July combination.  And the number of lows of 70°+ in June and July (37) tied June-July 2010 for the greatest number.  (37 is the  average number for an entire year.)

 

Chart - hottest june_july combos

 

Here are previous recaps of July from 2014 thru 2019:

July 2019

July 2018

July 2017

July 2016

July 2015

July 2014

  Tropical


 

Comments

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Landen

When was the last time nyc had 16 or more 90°+ days through july 31

Rob

The previous year it happened was in 2011 (also in 2010), and the 16th occurrence was on the same date as this year - 7/30. Including 2020, 23 years have had 16 days of 90+ high by 7/31. All but one of these years was after 1941.

Ken K. in NJ

Is the 67 degrees the warmest low temperature for any month? Or was there an August with a "higher" low? Thanks.

Rob

Ken, the reading is the warmest coolest reading of any month.

William

to answer Ken’s question, yes, the 67° is in fact the warmest “coldest” reading for any calendar month of all time. the previous month with this distinction was in July 2008, when its coldest reading was 66°. the warmest “coldest” reading in June of all time is 58°, which happened in six years, and the warmest “coldest” reading in August of all time is 65°, which happened in 2018, 2005 and 1906.

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