Fitchburg, WI Weather & Growing Conditions
Today
83°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 83. Southwest wind 5 to 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 |
|---|---|---|---|---|
| Today | 83°F | Partly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 28% |
| Tonight | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph W | 85% |
| Wednesday | 75°F | Patchy Fog | 5 mph NW | 49% |
| Wednesday Night | 58°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 25% |
| Thursday | 79°F | Slight Chance Rain Showers then Mostly Sunny | 0 to 5 mph N | 16% |
| Thursday Night | 59°F | Mostly Clear | 0 mph | 4% |
| Friday | 81°F | Sunny | 0 to 5 mph SW | 3% |
| Friday Night | 63°F | Mostly Clear | 5 mph SW | 4% |
| Saturday | 84°F | Mostly Sunny | 5 to 10 mph SW | 13% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 29% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 10 mph SW | 29% |
| Sunday Night | 66°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph SW | 50% |
| Monday | 83°F | Chance Rain Showers | 5 mph S | 50% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 5 mph NW | 42% |
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 Aug 4, 2026.