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While parts of the region could see another 90° day today before the heat breaks, it is perhaps an opportune time to look at the New York City area's summer (June-August) records. New York City area refers to the three New York City stations (JFK, LGA, and NYC).

Summer 2020 was the hottest summer on record in the New York City area in terms of the seasonal mean temperature. The records are below:

Highest average maximum temperature: 87.3°, 1966 (NYC)
Highest average minimum temperature: 72.1°, 2020 (LGA)
Highest average mean temperature: 79.5°, 2020 (LGA)

Monthly:

Average monthly maximum temperature: 90.6°, July 2020 (LGA)
Average monthly minimum temperature: 75.2°, July 2020 (LGA)
Average monthly mean temperature:  82.9°, July 2020 (LGA)

Annual:

Most 90° high temperatures: 48, 2010 (LGA)
Most 80° low temperatures: 7, 1908 (NYC), 2002 (LGA), 2020 (LGA)

All-Time:

Highest maximum temperature: 107°, July 3, 1966 (LGA)
Highest minimum temperature: 86°, July 5, 1999 (LGA), August 2, 2006 (LGA), July 19, 2013 (LGA)

 

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The closer you were to New England, the hotter the last several summers have been. A very impressive run of summer heat across the region since 2010. We never had this many top 10 warmest summers in such a short period of time. 2020 was the warmest summer on record at LGA, BDL, BTV, and CAR. It was the 2nd warmest summer for ISP and BDR. 


 

Time Series Summary for NEWARK LIBERTY INTL AP, NJ
Click column heading to sort ascending, click again to sort descending.
Rank
Year
Mean Avg Temperature 
Missing Count
1 1993 79.2 0
2 2010 78.7 0
3 1994 78.5 0
4 2011 78.0 0
5 2005 77.8 0
6 1988 77.7 0
7 2020 77.6 0
- 2016 77.6 0
- 1973 77.6 0
8 1999 77.1 0
9 1995 77.0 0
10 2012 76.9 0


 

Time Series Summary for NY CITY CENTRAL PARK, NY
Click column heading to sort ascending, click again to sort descending.
Rank
Year
Mean Avg Temperature 
Missing Count
1 2010 77.8 0
2 1966 77.3 0
3 2005 77.1 0
4 2020 76.9 0
- 1993 76.9 0
- 1983 76.9 0
5 1949 76.8 0
6 2016 76.7 0
- 1999 76.7 0
7 1988 76.6 0
- 1980 76.6 0
- 1906 76.6 0
8 1995 76.5 0
- 1944 76.5 0
9 2015 76.3 0
- 1991 76.3 0
- 1952 76.3 0
- 1943 76.3 0
- 1908 76.3 0
10 1994 76.2 0


 

Time Series Summary for JFK INTERNATIONAL AIRPORT, NY
Click column heading to sort ascending, click again to sort descending.
Rank
Year
Mean Avg Temperature 
Missing Count
1 2010 77.1 0
2 2016 76.5 0
3 2015 76.0 0
4 2011 75.8 0
5 2020 75.7 0
6 1983 75.6 0
7 1984 75.4 0
8 2012 75.3 0
- 1991 75.3 0
9 1971 75.2 0
- 1949 75.2 0
10 2005 75.1 0

 

Time Series Summary for LAGUARDIA AIRPORT, NY
Click column heading to sort ascending, click again to sort descending.
Rank
Year
Mean Avg Temperature 
Missing Count
1 2020 79.5 0
2 2010 79.1 0
3 2016 78.8 0
4 2005 78.0 0
5 2018 77.9 0
6 1966 77.5 0
7 2006 77.4 0
- 1999 77.4 0
8 2019 77.3 0
- 2012 77.3 0
- 1991 77.3 0
9 1994 77.2 0
10 1995 77.1 0


 

Time Series Summary for IGOR I SIKORSKY MEMORIAL AIRPORT, CT
Click column heading to sort ascending, click again to sort descending.
Rank
Year
Mean Avg Temperature 
Missing Count
1 2016 75.4 0
2 2020 75.3 0
3 2010 75.0 0
4 2018 74.3 0
5 2012 74.2 0
6 2019 74.0 0
- 2011 74.0 0
- 1994 74.0 0
- 1993 74.0 0
7 2005 73.9 0
8 2013 73.8 0
- 1973 73.8 0
9 1949 73.7 0
10 2008 73.6 0

 

Time Series Summary for ISLIP-LI MACARTHUR AP, NY
Click column heading to sort ascending, click again to sort descending.
Rank
Year
Mean Avg Temperature 
Missing Count
1 2010 74.7 0
2 2020 74.6 0
3 1999 74.5 0
4 2016 74.4 0
5 2011 73.9 0
6 2019 73.8 0
7 2018 73.5 0
- 2005 73.5 0
8 2013 73.4 0
9 2012 73.3 0
- 1991 73.3 0
10 2015 73.2 0

 

Time Series Summary for HARTFORD-BRADLEY INTERNATIONAL AIRPORT, CT
Click column heading to sort ascending, click again to sort descending.
Rank
Year
Mean Avg Temperature 
Missing Count
1 2020 74.4 0
- 1973 74.4 0
2 2005 73.9 0
3 2016 73.8 0
4 2010 73.7 0
- 1949 73.7 0
5 2019 73.5 0
6 2018 73.3 0
- 1966 73.3 0
7 2012 72.9 0
- 1999 72.9 0
8 2013 72.7 0
- 1994 72.7 0
9 1995 72.6 0
- 1952 72.6 0
10 2006 72.5 0
- 1983 72.5 0

 

Time Series Summary for Burlington Area, VT (ThreadEx)
Click column heading to sort ascending, click again to sort descending.
Rank
Year
Mean Avg Temperature 
Missing Count
1 2020 72.3 0
2 1949 72.2 0
3 2018 72.1 0
4 2005 71.5 0
5 2016 71.4 0
- 1995 71.4 0
6 1901 71.2 0
7 1899 71.0 0
8 2012 70.9 0
- 1999 70.9 0
- 1895 70.9 0
9 1900 70.8 0
10 1955 70.6 0

 

Time Series Summary for Caribou Area, ME (ThreadEx)
Click column heading to sort ascending, click again to sort descending.
Rank
Year
Mean Avg Temperature 
Missing Count
1 2020 66.9 0
2 2018 66.2 0
3 1973 66.0 0
4 1970 65.8 0
5 2014 65.7 0
- 2012 65.7 0
- 1995 65.7 0
6 2010 65.4 0
7 1990 65.2 0
8 2016 64.9 0
9 2005 64.8 0
- 1975 64.8 0
- 1967 64.8 0
10 2019 64.7 0
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17 hours ago, mjr said:

A south wind at JFK comes directly off the cool ocean (about 1500 miles of it). At Newark,  even a south wind with no westerly component, travels over about 50 miles of land. Places like LGA and NYC are far enough away from the ocean so that they can experience significant daytime heating even if an afternoon sea breeze eventually cuts it off.  During the spring there can be times when the temperature difference between Newark and JFK can be 20 degrees or more. La Guardia underperforms if the wind direction is from the NE or ENE coming off Long Island Sound. Central Park underperforms if the trees have leaves on them.

Interestingly,  the Boston airport station is also directly on the ocean but  there the ocean is to the east. Thus, a south or southwest wind at Boston will allow for hot temperatures and a west wind even hotter because of a downslope effect. However, a wind from the north through the east (or, alternatively, a light pressure gradient allowing for an afternoon sea breeze) will result in unpleasantly chilly temperatures.

 

Geography is destiny. 

Thank you! That is very educational.

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