Windsor, WI Weather & Growing Conditions
Overnight
58°F
Showers And Thunderstorms
Showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 58. East wind 10 to 15 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 58°F | Showers And Thunderstorms | 10 to 15 mph E | 100% |
| Saturday | 70°F | Showers And Thunderstorms | 5 to 10 mph SE | 100% |
| Saturday Night | 57°F | Showers And Thunderstorms | 5 to 10 mph E | 82% |
| Sunday | 66°F | Scattered Rain Showers then Partly Sunny | 15 mph NE | 28% |
| Sunday Night | 50°F | Mostly Cloudy | 10 to 15 mph NE | 6% |
| Monday | 63°F | Mostly Cloudy | 10 to 15 mph NE | 11% |
| Monday Night | 46°F | Mostly Cloudy | 5 to 10 mph NE | 11% |
| Tuesday | 62°F | Partly Sunny | 5 to 15 mph NE | 7% |
| Tuesday Night | 45°F | Partly Cloudy | 5 to 10 mph NE | 3% |
| Wednesday | 65°F | Mostly Sunny | 5 to 10 mph NE | 2% |
| Wednesday Night | 47°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 67°F | Mostly Sunny | 0 to 5 mph NE | 3% |
| Thursday Night | 48°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Friday | 71°F | Mostly Sunny | 0 to 5 mph NE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Windsor, WI
Last spring frost
May 1
First fall frost
Oct 10
Growing season
160 days
Hardiness zone
5a
Explore more for Windsor, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Madison Dane Rgnl Ap, Wi (4.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.