All-time weather records — Norwalk, WI
Climate change signal in Norwalk
of Norwalk's all-time daily heat records were set in the last decade (360 of 366 records since 2015).
of all-time daily cold records were set in the last decade (344 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 | # |
|---|---|---|---|---|
| 2010s | 160 | 154 | ||
| 2020s | 206 | 212 |
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 2014, the latest in 2026. Period of observation: 2014-2026.
Records by month
| Month | Hottest day | Coldest day | Wettest day |
|---|---|---|---|
| January | 57.0°F — Jan 31, 2025 | -40.0°F — Jan 31, 2019 | 1.01 in — Jan 9, 2026 |
| February | 69.1°F — Feb 28, 2024 | -38.9°F — Feb 1, 2019 | 0.98 in — Feb 20, 2026 |
| March | 82.0°F — Mar 29, 2025 | -22.0°F — Mar 4, 2019 | 1.20 in — Mar 20, 2025 |
| April | 86.0°F — Apr 13, 2023 | 8.1°F — Apr 5, 2018 | 1.96 in — Apr 4, 2026 |
| May | 93.9°F — May 28, 2018 | 23.0°F — May 9, 2020 | 2.96 in — May 3, 2021 |
| June | 93.9°F — Jun 15, 2022 | 35.1°F — Jun 12, 2023 | 2.43 in — Jun 22, 2024 |
| July | 93.0°F — Jul 20, 2019 | 44.1°F — Jul 7, 2023 | 6.15 in — Jul 20, 2017 |
| August | 100.9°F — Aug 24, 2023 | 42.1°F — Aug 31, 2023 | 10.52 in — Aug 28, 2018 |
| September | 95.0°F — Sep 4, 2023 | 28.9°F — Sep 28, 2022 | 3.70 in — Sep 22, 2016 |
| October | 87.1°F — Oct 2, 2023 | 19.0°F — Oct 27, 2020 | 2.48 in — Oct 7, 2017 |
| November | 73.9°F — Nov 3, 2022 | -0.9°F — Nov 8, 2019 | 1.46 in — Nov 5, 2022 |
| December | 66.9°F — Dec 16, 2021 | -14.1°F — Dec 14, 2025 | 2.32 in — Dec 14, 2015 |
Click a month to see every daily record for that month in Norwalk.