All-time weather records — Johnstown, PA
Climate change signal in Johnstown
of Johnstown's all-time daily heat records were set in the last decade (201 of 366 records since 2015).
of all-time daily cold records were set in the last decade (120 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 | # |
|---|---|---|---|---|
| 2000s | 118 | 166 | ||
| 2010s | 144 | 141 | ||
| 2020s | 104 | 59 |
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 2000, the latest in 2026. Period of observation: 2000-2026.
Records by month
| Month | Hottest day | Coldest day | Wettest day |
|---|---|---|---|
| January | 64.9°F — Jan 8, 2008 | -13.9°F — Jan 7, 2014 | 1.68 in — Jan 3, 2023 |
| February | 73.0°F — Feb 20, 2018 | -10.8°F — Feb 16, 2015 | 1.50 in — Feb 15, 2018 |
| March | 78.1°F — Mar 22, 2026 | -1.8°F — Mar 6, 2015 | 1.55 in — Mar 28, 2020 |
| April | 82.9°F — Apr 27, 2009 | 14.2°F — Apr 10, 2016 | 2.68 in — Apr 2, 2024 |
| May | 87.1°F — May 30, 2006 | 23.2°F — May 9, 2020 | 3.15 in — May 27, 2012 |
| June | 90.0°F — Jun 22, 2024 | 37.9°F — Jun 2, 2003 | 2.98 in — Jun 15, 2017 |
| July | 93.9°F — Jul 22, 2011 | 42.1°F — Jul 2, 2001 | 2.20 in — Jul 30, 2016 |
| August | 90.0°F — Aug 1, 2002 | 44.1°F — Aug 30, 2025 | 3.43 in — Aug 9, 2024 |
| September | 88.0°F — Sep 4, 2018 | 32.0°F — Sep 29, 2000 | 3.29 in — Sep 1, 2021 |
| October | 84.0°F — Oct 1, 2019 | 26.2°F — Oct 28, 2011 | 2.79 in — Oct 29, 2012 |
| November | 75.9°F — Nov 4, 2003 | 6.1°F — Nov 25, 2005 | 2.40 in — Nov 11, 2022 |
| December | 71.1°F — Dec 5, 2001 | -7.8°F — Dec 23, 2022 | 1.97 in — Dec 19, 2008 |
Click a month to see every daily record for that month in Johnstown.