All-time weather records — Upper Marlboro, MD

Record high
105.1°F
July 8, 2012
Record low
-11.9°F
January 22, 1984
Wettest day
7.46 in
September 8, 2011

Climate change signal in Upper Marlboro

2.2%

of Upper Marlboro's all-time daily heat records were set in the last decade (8 of 366 records since 2015).

2.5%

of all-time daily cold records were set in the last decade (9 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 #
1950s
26
38
1960s
59
113
1970s
62
82
1980s
58
76
1990s
64
25
2000s
53
9
2010s
44
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 1956, the latest in 2016. Period of observation: 1956-2016.

Records by month

Month Hottest day Coldest day Wettest day
January 75.0°F — Jan 5, 2004 -11.9°F — Jan 22, 1984 2.25 in — Jan 1, 1976
February 80.1°F — Feb 25, 1985 -8.0°F — Feb 6, 1996 2.98 in — Feb 5, 1998
March 89.1°F — Mar 31, 1998 1.9°F — Mar 11, 1960 2.14 in — Mar 29, 1984
April 95.0°F — Apr 18, 2002 18.0°F — Apr 1, 1969 2.40 in — Apr 21, 2008
May 97.0°F — May 31, 1991 28.0°F — May 11, 1966 5.15 in — May 12, 2008
June 104.0°F — Jun 30, 2012 39.0°F — Jun 4, 1976 4.92 in — Jun 22, 1972
July 105.1°F — Jul 8, 2012 43.0°F — Jul 1, 1988 4.05 in — Jul 14, 1975
August 102.0°F — Aug 16, 1988 39.0°F — Aug 29, 1982 5.27 in — Aug 28, 2011
September 99.0°F — Sep 12, 1983 30.0°F — Sep 24, 1974 7.46 in — Sep 8, 2011
October 93.0°F — Oct 10, 2007 19.9°F — Oct 24, 1969 5.65 in — Oct 30, 2012
November 84.9°F — Nov 2, 1974 12.9°F — Nov 27, 1974 2.68 in — Nov 7, 1963
December 80.1°F — Dec 7, 1998 1.0°F — Dec 14, 1960 2.42 in — Dec 25, 1986

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