All-time weather records — Mammoth Spring, AR

Record high
111.0°F
September 17, 2001
Record low
-24.0°F
February 2, 1951
Wettest day
12.36 in
December 3, 1982

Climate change signal in Mammoth Spring

6.8%

of Mammoth Spring's all-time daily heat records were set in the last decade (25 of 366 records since 2015).

4.4%

of all-time daily cold records were set in the last decade (16 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
8
13
1910s
41
47
1920s
37
31
1930s
51
13
1940s
23
34
1950s
70
41
1960s
32
40
1970s
20
48
1980s
39
42
1990s
4
24
2000s
12
8
2010s
12
12
2020s
17
13

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 1904, the latest in 2026. Period of observation: 1904-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 79.0°F — Jan 25, 1950 -23.1°F — Jan 13, 1918 7.50 in — Jan 30, 2010
February 89.1°F — Feb 13, 1962 -24.0°F — Feb 2, 1951 4.25 in — Feb 14, 1949
March 97.0°F — Mar 24, 1929 1.0°F — Mar 5, 1960 7.20 in — Mar 19, 2008
April 95.0°F — Apr 19, 1920 19.0°F — Apr 4, 1987 5.10 in — Apr 5, 1997
May 99.0°F — May 31, 1913 28.0°F — May 2, 1909 4.91 in — May 12, 1918
June 108.0°F — Jun 29, 2012 35.1°F — Jun 3, 1969 3.50 in — Jun 13, 1925
July 109.9°F — Jul 13, 1980 42.1°F — Jul 1, 1992 5.10 in — Jul 8, 1928
August 109.0°F — Aug 9, 1934 39.9°F — Aug 29, 1986 6.00 in — Aug 16, 1926
September 111.0°F — Sep 17, 2001 30.0°F — Sep 29, 1967 4.40 in — Sep 23, 2006
October 96.1°F — Oct 11, 1963 15.1°F — Oct 21, 1952 4.33 in — Oct 30, 2009
November 87.1°F — Nov 1, 1950 1.9°F — Nov 29, 1958 5.00 in — Nov 18, 2003
December 80.1°F — Dec 3, 1956 -20.9°F — Dec 9, 1917 12.36 in — Dec 3, 1982

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