All-time weather records — Dover, NH
Climate change signal in Dover
of Dover's all-time daily heat records were set in the last decade (194 of 366 records since 2015).
of all-time daily cold records were set in the last decade (142 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 | 106 | 160 | ||
| 2010s | 144 | 142 | ||
| 2020s | 116 | 64 |
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 2002, the latest in 2026. Period of observation: 2001-2026.
Records by month
| Month | Hottest day | Coldest day | Wettest day |
|---|---|---|---|
| January | 68.2°F — Jan 6, 2007 | -16.8°F — Jan 16, 2009 | 1.98 in — Jan 27, 2015 |
| February | 74.8°F — Feb 21, 2018 | -13.2°F — Feb 4, 2023 | 3.26 in — Feb 25, 2010 |
| March | 83.5°F — Mar 22, 2012 | -5.8°F — Mar 4, 2003 | 4.22 in — Mar 14, 2010 |
| April | 91.6°F — Apr 17, 2002 | 15.6°F — Apr 5, 2016 | 4.33 in — Apr 16, 2007 |
| May | 92.1°F — May 26, 2010 | 27.1°F — May 1, 2008 | 4.96 in — May 13, 2006 |
| June | 98.4°F — Jun 24, 2025 | 35.4°F — Jun 1, 2020 | 2.57 in — Jun 2, 2012 |
| July | 98.1°F — Jul 22, 2011 | 46.4°F — Jul 10, 2009 | 3.49 in — Jul 24, 2008 |
| August | 97.3°F — Aug 4, 2022 | 42.4°F — Aug 22, 2007 | 2.95 in — Aug 25, 2010 |
| September | 92.8°F — Sep 9, 2002 | 30.7°F — Sep 20, 2014 | 3.68 in — Sep 6, 2008 |
| October | 84.9°F — Oct 6, 2025 | 18.7°F — Oct 31, 2020 | 4.83 in — Oct 8, 2005 |
| November | 79.7°F — Nov 6, 2024 | 6.4°F — Nov 22, 2018 | 2.57 in — Nov 14, 2009 |
| December | 66.9°F — Dec 3, 2009 | -13.0°F — Dec 29, 2017 | 2.81 in — Dec 14, 2019 |
Click a month to see every daily record for that month in Dover.