Jefferson, WI
Climate overview — based on NOAA 1991-2020 normals from JEFFERSON WWTP, WI US.
Year-round temperatures (°F)
Climate summary
Jefferson has an annual average temperature of 47.2°F with about 38.7 inches of precipitation per year. The warmest month is July (average high 82.4°F), and the coldest is January (average low 11.0°F). June is typically the wettest month (4.97 in) and February the driest (1.58 in).
Best time to visit Jefferson
Full guide →Climate change signal
All-time records →177 of 366 (48.4%) of Jefferson's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 2000s | 100 | |
| 2010s | 165 | |
| 2020s | 101 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 26.8°F | 11.0°F | 18.9°F | 1.64 in | — | 11 |
| February | 31.1°F | 14.1°F | 22.6°F | 1.58 in | — | 10 |
| March | 43.2°F | 24.6°F | 33.9°F | 2.14 in | — | 9 |
| April | 56.3°F | 35.5°F | 45.9°F | 4.02 in | — | 13 |
| May | 68.7°F | 48.1°F | 58.4°F | 4.45 in | — | 13 |
| June | 78.8°F | 58.1°F | 68.4°F | 4.97 in | — | 11 |
| July | 82.4°F | 62.4°F | 72.4°F | 4.54 in | — | 9 |
| August | 80.4°F | 60.8°F | 70.6°F | 4.30 in | — | 10 |
| September | 73.6°F | 51.8°F | 62.7°F | 3.72 in | — | 10 |
| October | 60.3°F | 40.6°F | 50.5°F | 3.12 in | — | 12 |
| November | 45.1°F | 28.5°F | 36.8°F | 2.37 in | — | 10 |
| December | 32.5°F | 18.2°F | 25.3°F | 1.89 in | — | 11 |
Climate twins of Jefferson
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).