Winter, WI Weather & Growing Conditions
Today
76°F
Mostly Sunny
Mostly sunny. High near 76, with temperatures falling to around 74 in the afternoon. West wind around 5 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Mostly Sunny | 5 mph W | 6% |
| Tonight | 50°F | Partly Cloudy | 0 to 5 mph NW | 4% |
| Wednesday | 76°F | Sunny | 0 to 5 mph W | 0% |
| Wednesday Night | 52°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Thursday | 81°F | Sunny | 5 to 10 mph SW | 2% |
| Thursday Night | 59°F | Mostly Clear | 5 to 10 mph SW | 4% |
| Friday | 84°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 17% |
| Friday Night | 59°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 10 mph SW | 28% |
| Saturday | 82°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph SW | 17% |
| Saturday Night | 59°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 50% |
| Sunday | 80°F | Chance Rain Showers | 0 to 5 mph W | 42% |
| Sunday Night | 57°F | Chance Showers And Thunderstorms | 0 to 5 mph N | 26% |
| Monday | 79°F | Slight Chance Rain Showers | 0 to 5 mph N | 23% |
| Monday Night | 57°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph N | 22% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Winter, WI
Last spring frost
May 19
First fall frost
Sep 27
Growing season
129 days
Hardiness zone
4a
Explore more for Winter, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Winter, Wi (5.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.