Sun Prairie, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sun Prairie, a city in Dane County, Wisconsin.
This Afternoon
69°F
Light Rain Likely
Rain before 3pm, then rain likely and a slight chance of thunderstorms. Cloudy, with a high near 69. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Sun Prairie
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Light Rain Likely | 15 mph S | 88% |
| Tonight | 56°F | Light Rain | 10 to 15 mph S | 92% |
| Wednesday | 61°F | Light Rain | 10 to 15 mph S | 76% |
| Wednesday Night | 46°F | Light Rain Likely | 10 to 15 mph SW | 66% |
| Thursday | 53°F | Light Rain | 5 to 10 mph W | 80% |
| Thursday Night | 38°F | Chance Light Rain then Mostly Cloudy | 10 to 15 mph N | 32% |
| Friday | 48°F | Slight Chance Light Rain then Partly Sunny | 5 to 15 mph N | 18% |
| Friday Night | 31°F | Partly Cloudy | 0 to 5 mph N | 3% |
| Saturday | 51°F | Mostly Sunny | 0 to 5 mph W | 1% |
| Saturday Night | 33°F | Partly Cloudy | 0 to 5 mph W | 8% |
| Sunday | 57°F | Slight Chance Light Rain | 5 to 10 mph W | 15% |
| Sunday Night | 35°F | Mostly Clear | 5 mph W | 6% |
| Monday | 59°F | Mostly Sunny | 5 to 15 mph SW | 1% |
| Monday Night | 39°F | Mostly Clear | 5 to 10 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Sun Prairie (43.183, -89.238). Updated through the day.
Growing snapshot for Sun Prairie
Last spring frost
May 1
First fall frost
Oct 10
Growing season
160 days
Hardiness zone
5a
More local growing data for Sun Prairie: nearby ZIP 53590 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Belleville
Black Earth
Blue Mounds
Cambridge
Cottage Grove
Cross Plains
Dane
Deerfield
DeForest
Fitchburg
Lake Ripley
Madison
Maple Bluff
Marshall
Mazomanie
McFarland
Middleton
Monona
Mount Horeb
Oregon
Rockdale
Shorewood Hills
Stoughton
Verona
Waunakee
Windsor
Climate data from the nearest NOAA station, Madison Dane Rgnl Ap, Wi (8.1 mi from Sun Prairie). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.