All-time weather records — Summit, NJ

Record high
181.9°F
May 18, 1949
Record low
-26.0°F
February 9, 1934
Wettest day
8.76 in
August 28, 1971

Climate change signal in Summit

14.2%

of Summit's all-time daily heat records were set in the last decade (52 of 366 records since 2015).

0.5%

of all-time daily cold records were set in the last decade (2 of 366 records since 2015).

If records were spread evenly across the station's history, you'd expect roughly 5% per decade. Decade-by-decade, here's where each record-breaking day was set:

Decade Heat records set # Cold records set #
1930s
27
131
1940s
55
99
1950s
35
35
1960s
22
35
1970s
26
24
1980s
31
27
1990s
44
9
2000s
52
3
2010s
51
3
2020s
23
·

Records are the all-time daily extremes that are still standing — each daily record can only be held by one year. The station's earliest hot record was set in 1931, the latest in 2025. Period of observation: 1931-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 73.0°F — Jan 27, 1950 -25.1°F — Jan 28, 1935 3.24 in — Jan 10, 2024
February 79.0°F — Feb 22, 2018 -26.0°F — Feb 9, 1934 2.81 in — Feb 25, 2016
March 89.1°F — Mar 31, 1998 -6.0°F — Mar 1, 1934 4.10 in — Mar 14, 2010
April 96.1°F — Apr 18, 2002 -9.9°F — Apr 8, 1982 5.34 in — Apr 16, 2007
May 181.9°F — May 18, 1949 25.0°F — May 10, 1986 4.46 in — May 29, 1968
June 102.9°F — Jun 10, 2011 30.9°F — Jun 1, 1938 5.75 in — Jun 6, 1992
July 107.1°F — Jul 7, 2010 36.0°F — Jul 19, 2009 5.06 in — Jul 25, 1997
August 104.0°F — Aug 5, 1944 6.1°F — Aug 31, 1932 8.76 in — Aug 28, 1971
September 100.0°F — Sep 9, 2015 26.1°F — Sep 27, 1947 7.60 in — Sep 17, 1999
October 93.9°F — Oct 3, 2019 12.9°F — Oct 28, 1936 4.77 in — Oct 30, 1973
November 84.0°F — Nov 3, 1950 -5.1°F — Nov 26, 1938 5.29 in — Nov 9, 1972
December 75.9°F — Dec 5, 1998 -16.1°F — Dec 28, 1933 3.03 in — Dec 31, 1948

Click a month to see every daily record for that month in Summit.