All-time weather records — Monessen, PA

Record high
99.0°F
July 8, 2012
Record low
-8.0°F
January 31, 2026
Wettest day
4.38 in
September 10, 2018

Climate change signal in Monessen

84.7%

of Monessen's all-time daily heat records were set in the last decade (310 of 366 records since 2015).

70.2%

of all-time daily cold records were set in the last decade (257 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
·
·
1940s
·
·
1950s
·
·
1960s
·
·
1970s
·
·
1980s
·
·
1990s
·
·
2000s
·
·
2010s
182
227
2020s
184
139

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 2011, the latest in 2026. Period of observation: 1931-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 71.1°F — Jan 12, 2020 -8.0°F — Jan 31, 2026 1.78 in — Jan 27, 1952
February 80.1°F — Feb 21, 2018 -8.0°F — Feb 1, 2026 2.45 in — Feb 16, 2018
March 82.0°F — Mar 8, 2026 -0.9°F — Mar 1, 2015 2.15 in — Mar 5, 1963
April 89.1°F — Apr 25, 2022 21.0°F — Apr 10, 2016 2.54 in — Apr 3, 2024
May 91.9°F — May 22, 2021 30.0°F — May 1, 2018 3.10 in — May 17, 2015
June 97.0°F — Jun 16, 2022 42.1°F — Jun 1, 2025 3.20 in — Jun 23, 1972
July 99.0°F — Jul 8, 2012 50.0°F — Jul 5, 2014 4.08 in — Jul 21, 1988
August 96.1°F — Aug 18, 2017 48.9°F — Aug 15, 2013 3.67 in — Aug 7, 2000
September 95.0°F — Sep 4, 2011 37.9°F — Sep 20, 2020 4.38 in — Sep 10, 2018
October 91.9°F — Oct 2, 2019 30.9°F — Oct 30, 2011 3.61 in — Oct 16, 1954
November 84.0°F — Nov 5, 2015 16.0°F — Nov 25, 2013 2.10 in — Nov 4, 1985
December 70.0°F — Dec 13, 2015 -0.9°F — Dec 24, 2022 2.74 in — Dec 3, 1991

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