All-time weather records — Elsmere, DE

Record high
102.9°F
July 10, 1936
Record low
-29.0°F
December 21, 2009
Wettest day
9.30 in
September 16, 1999

Climate change signal in Elsmere

7.7%

of Elsmere's all-time daily heat records were set in the last decade (28 of 366 records since 2015).

2.7%

of all-time daily cold records were set in the last decade (10 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
37
70
1940s
67
69
1950s
43
28
1960s
24
57
1970s
34
72
1980s
35
37
1990s
41
9
2000s
38
10
2010s
37
13
2020s
10
1

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 1932, the latest in 2025. Period of observation: 1931-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 73.9°F — Jan 26, 1950 -9.0°F — Jan 17, 1982 2.77 in — Jan 23, 1998
February 73.9°F — Feb 21, 2018 -15.0°F — Feb 9, 1934 2.60 in — Feb 11, 2018
March 87.1°F — Mar 30, 1998 5.0°F — Mar 4, 1943 3.77 in — Mar 21, 2000
April 93.9°F — Apr 22, 1985 19.0°F — Apr 7, 1982 4.92 in — Apr 30, 2014
May 93.9°F — May 18, 1986 19.0°F — May 11, 2008 3.62 in — May 31, 1993
June 98.1°F — Jun 26, 1952 39.9°F — Jun 1, 1945 4.77 in — Jun 27, 1938
July 102.9°F — Jul 10, 1936 37.9°F — Jul 28, 1935 7.03 in — Jul 9, 1952
August 100.0°F — Aug 9, 2001 43.0°F — Aug 29, 1982 6.42 in — Aug 1, 1945
September 97.0°F — Sep 1, 1932 32.0°F — Sep 27, 1940 9.30 in — Sep 16, 1999
October 93.9°F — Oct 5, 1941 23.0°F — Oct 28, 1936 4.18 in — Oct 10, 1971
November 84.0°F — Nov 1, 1950 12.0°F — Nov 26, 1938 3.33 in — Nov 17, 1935
December 73.0°F — Dec 4, 1998 -29.0°F — Dec 21, 2009 2.80 in — Dec 12, 1983

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