All-time weather records — Mountain Lake Park, MD

Record high
100.9°F
August 7, 1918
Record low
-40.0°F
January 13, 1912
Wettest day
9.50 in
November 25, 2008

Climate change signal in Mountain Lake Park

13.4%

of Mountain Lake Park's all-time daily heat records were set in the last decade (49 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 #
1890s
·
14
1900s
17
38
1910s
43
48
1920s
36
45
1930s
60
45
1940s
40
41
1950s
29
23
1960s
6
41
1970s
12
27
1980s
25
20
1990s
18
6
2000s
13
5
2010s
35
8
2020s
32
5

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 1903, the latest in 2026. Period of observation: 1893-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 75.0°F — Jan 29, 1914 -40.0°F — Jan 13, 1912 2.08 in — Jan 12, 2009
February 75.9°F — Feb 11, 1932 -29.0°F — Feb 7, 1907 3.30 in — Feb 9, 1994
March 82.9°F — Mar 22, 1904 -20.0°F — Mar 11, 1960 3.07 in — Mar 1, 2012
April 88.0°F — Apr 25, 1921 -2.0°F — Apr 1, 1923 2.20 in — Apr 9, 1980
May 89.1°F — May 12, 1944 17.1°F — May 2, 1943 2.68 in — May 31, 1985
June 95.0°F — Jun 4, 1936 26.1°F — Jun 1, 1930 2.48 in — Jun 30, 2019
July 98.1°F — Jul 21, 1933 33.1°F — Jul 1, 1988 4.16 in — Jul 9, 1985
August 100.9°F — Aug 7, 1918 30.0°F — Aug 12, 1930 4.40 in — Aug 23, 1975
September 95.0°F — Sep 1, 1932 19.0°F — Sep 29, 1942 3.48 in — Sep 6, 1996
October 88.0°F — Oct 1, 1927 7.0°F — Oct 22, 1930 4.25 in — Oct 15, 1954
November 78.1°F — Nov 1, 1929 -16.1°F — Nov 29, 1930 9.50 in — Nov 25, 2008
December 73.9°F — Dec 7, 1951 -32.1°F — Dec 30, 1917 6.50 in — Dec 31, 2008

Click a month to see every daily record for that month in Mountain Lake Park.