Fitchburg, WI Weather & Growing Conditions
Overnight
55°F
Chance Light Rain
A chance of rain. Cloudy, with a low around 55. South wind around 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Chance Light Rain | 10 mph S | 29% |
| Wednesday | 59°F | Slight Chance Light Rain | 15 mph SW | 21% |
| Wednesday Night | 45°F | Chance Light Rain | 15 mph SW | 40% |
| Thursday | 53°F | Light Rain Likely | 10 to 15 mph W | 60% |
| Thursday Night | 36°F | Mostly Cloudy | 10 mph N | 13% |
| Friday | 47°F | Partly Sunny | 5 to 15 mph N | 3% |
| Friday Night | 30°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 50°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 33°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 55°F | Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 34°F | Mostly Clear | 0 to 5 mph W | 0% |
| Monday | 59°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 60°F | Sunny | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fitchburg, WI
Last spring frost
May 1
First fall frost
Oct 9
Growing season
161 days
Hardiness zone
5b
Explore more for Fitchburg, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Uw Arboretum - Madison, Wi (2.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.