DeForest, WI Weather & Growing Conditions
Tonight
56°F
Light Rain
Rain. Cloudy, with a low around 56. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Light Rain | 10 to 15 mph S | 80% |
| Wednesday | 59°F | Slight Chance Light Rain then Cloudy | 15 mph S | 22% |
| Wednesday Night | 46°F | Cloudy then Chance Light Rain | 15 mph SW | 41% |
| Thursday | 52°F | Chance Light Rain | 10 to 15 mph W | 48% |
| Thursday Night | 37°F | Chance Light Rain then Mostly Cloudy | 10 mph N | 30% |
| Friday | 48°F | Slight Chance Light Rain then Partly Sunny | 5 to 15 mph N | 18% |
| Friday Night | 30°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 | 34°F | Mostly Clear | 5 mph W | 6% |
| Monday | 59°F | Sunny | 5 to 15 mph SW | 1% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph W | 1% |
| Tuesday | 59°F | Sunny | 5 to 10 mph W | 1% |
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 Nov 4, 2026.