DeForest, WI Weather & Growing Conditions
Today
69°F
Chance Showers And Thunderstorms then Showers And Thunderstorms
A chance of showers and thunderstorms before 11am, then showers and thunderstorms. Cloudy, with a high near 69. Southeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph SE | 78% |
| Tonight | 57°F | Showers And Thunderstorms | 5 to 10 mph NE | 77% |
| Sunday | 66°F | Chance Rain Showers then Cloudy | 10 to 15 mph NE | 42% |
| Sunday Night | 50°F | Mostly Cloudy | 10 to 15 mph NE | 4% |
| Monday | 62°F | Mostly Cloudy | 10 to 15 mph NE | 10% |
| Monday Night | 46°F | Mostly Cloudy | 5 to 10 mph NE | 9% |
| Tuesday | 62°F | Partly Sunny | 5 to 15 mph NE | 6% |
| Tuesday Night | 44°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 | 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% |
| Friday Night | 49°F | Partly Cloudy | 0 to 5 mph E | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for DeForest, WI
Last spring frost
May 4
First fall frost
Oct 6
Growing season
154 days
Hardiness zone
5a
Explore more for DeForest, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Arlington, Wi (3.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.