Jefferson, WI Weather & Climate Normals
Jefferson's real weather, in one number
Jefferson, WI scores 47/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 5 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Jefferson's hottest and coldest months
Jefferson's hottest month is Jul, averaging 72°F; its coldest is Jan, averaging 19°F, a 53.5°F swing across the year, one of the widest gaps in this dataset.
Jefferson's weather across the year
| Month | Avg high | Avg low | Precip |
|---|---|---|---|
| Jan | 27°F | 11°F | 1.64in |
| Feb | 31°F | 14°F | 1.58in |
| Mar | 43°F | 25°F | 2.14in |
| Apr | 56°F | 36°F | 4.02in |
| May | 69°F | 48°F | 4.45in |
| Jun | 79°F | 58°F | 4.97in |
| Jul | 82°F | 62°F | 4.54in |
| Aug | 80°F | 61°F | 4.3in |
| Sep | 74°F | 52°F | 3.72in |
| Oct | 60°F | 41°F | 3.12in |
| Nov | 45°F | 29°F | 2.37in |
| Dec | 33°F | 18°F | 1.89in |
May, Jun, Jul, Aug, and Sep are the best time to see Jefferson at its mildest; the rest of the year, plan around Jan's cold.
Rain and snow in Jefferson
Over a typical year, Jefferson sees about 38.74in of precipitation a year across roughly 129 days with measurable rain or snow. That station has no snowfall reading, so none is shown rather than assumed.
Where Jefferson ranks
Jefferson ranks 2803 of 4876 US cities in this dataset for comfort score, and 57 of 157 within WI. About 7,766 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Jefferson Wwtp, WI US, 0.7 miles from Jefferson, not a prediction for any specific day.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is