All-time weather records — Rockville, MD

Record high
105.1°F
July 31, 1954
Record low
-13.0°F
January 21, 1985
Wettest day
7.90 in
June 22, 1972

Climate change signal in Rockville

0%

of Rockville's all-time daily heat records were set in the last decade (0 of 366 records since 2015).

0%

of all-time daily cold records were set in the last decade (0 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 #
1900s
2
2
1910s
59
120
1920s
4
17
1940s
4
·
1950s
79
4
1960s
48
42
1970s
52
107
1980s
50
60
1990s
40
10
2000s
28
4

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 1908, the latest in 2007. Period of observation: 1907-2007.

Records by month

Month Hottest day Coldest day Wettest day
January 78.1°F — Jan 26, 1950 -13.0°F — Jan 21, 1985 2.42 in — Jan 1, 1976
February 82.0°F — Feb 24, 1985 -11.9°F — Feb 10, 1979 1.92 in — Feb 12, 1985
March 89.1°F — Mar 30, 1986 1.0°F — Mar 21, 1914 3.55 in — Mar 21, 1918
April 100.0°F — Apr 27, 1915 18.0°F — Apr 1, 1969 3.01 in — Apr 12, 1913
May 97.0°F — May 26, 1914 28.0°F — May 9, 1976 3.85 in — May 7, 1912
June 102.0°F — Jun 24, 1914 35.1°F — Jun 8, 1977 7.90 in — Jun 22, 1972
July 105.1°F — Jul 31, 1954 37.9°F — Jul 6, 1979 5.00 in — Jul 27, 1908
August 104.0°F — Aug 6, 1918 39.0°F — Aug 17, 1979 4.50 in — Aug 1, 1978
September 99.0°F — Sep 6, 1954 28.0°F — Sep 24, 1974 4.46 in — Sep 26, 1975
October 93.0°F — Oct 3, 1919 19.9°F — Oct 21, 1917 4.36 in — Oct 23, 1990
November 84.9°F — Nov 1, 1950 10.0°F — Nov 14, 1920 3.50 in — Nov 27, 1993
December 80.1°F — Dec 29, 1984 -11.9°F — Dec 27, 1914 2.28 in — Dec 24, 1986

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