Sun Prairie, WI Weather & Climate Normals
What a normal year in Sun Prairie actually looks like
On the 30-year record NOAA keeps for Sun Prairie, WI, the comfort score comes out to 42/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 5 months a year land in the 55–75°F range this site treats as mild.
How much Sun Prairie's weather actually swings
Average temperatures in Sun Prairie run from 18°F in Jan up to 71°F in Jul, a 53.5°F seasonal swing, one of the widest gaps in this dataset.
Sun Prairie, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 26°F | 9°F | 1.24in | 10.7in |
| Feb | 31°F | 12°F | 1.4in | 11.2in |
| Mar | 43°F | 23°F | 1.98in | 5.3in |
| Apr | 57°F | 34°F | 3.74in | 1.9in |
| May | 69°F | 46°F | 4.24in | 0.1in |
| Jun | 79°F | 56°F | 5.14in | 0in |
| Jul | 82°F | 60°F | 4.17in | 0in |
| Aug | 80°F | 58°F | 3.8in | 0in |
| Sep | 73°F | 49°F | 3.34in | 0in |
| Oct | 60°F | 38°F | 2.78in | 0.3in |
| Nov | 44°F | 26°F | 2.23in | 2.4in |
| Dec | 32°F | 16°F | 1.45in | 10.7in |
If you're timing a visit, May, Jun, Jul, Aug, and Sep are Sun Prairie's mildest stretch; if you're moving there, you should plan around Jan's cold instead.
How wet Sun Prairie actually gets
Over a typical year, Sun Prairie sees about 35.51in of precipitation a year across roughly 105 days with measurable rain or snow, with 42.6in of snow a year.
Sun Prairie against the rest of the country
Out of 4876 cities scored here, Sun Prairie comes in at 4181; within WI alone it ranks 99 of 157. Population is about 39,253.
Checking the actual forecast
These figures come from Arlington, WI US, the NOAA station 10.0 miles from Sun Prairie, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why this uses the nearest NOAA station · How the comfort score is calculated