Winchester, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winchester, a community in Winnebago County, Wisconsin.
Today
82°F
Partly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of rain showers between noon and 1pm, then a slight chance of showers and thunderstorms between 1pm and 2pm, then a chance of showers and thunderstorms between 2pm and 4pm, then a chance of showers and thunderstorms. Partly sunny. High near 82, with temperatures falling to around 80 in the afternoon. Heat index values as high as 85. Southwest wind 8 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Winchester
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 8 to 13 mph SW | 28% |
| Tonight | 62°F | Chance Showers And Thunderstorms | 2 to 7 mph WNW | 51% |
| Wednesday | 78°F | Chance Rain Showers | 3 mph SSW | 14% |
| Wednesday Night | 58°F | Slight Chance Rain Showers | 3 mph WSW | 8% |
| Thursday | 81°F | Patchy Fog then Sunny | 1 to 5 mph SW | 3% |
| Thursday Night | 61°F | Mostly Clear | 5 mph SSW | 0% |
| Friday | 84°F | Sunny | 2 to 10 mph SW | 2% |
| Friday Night | 65°F | Mostly Clear | 6 to 9 mph SSW | 13% |
| Saturday | 85°F | Mostly Sunny | 5 to 9 mph SW | 13% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms | 3 to 8 mph SW | 38% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 5 to 9 mph WSW | 38% |
| Sunday Night | 64°F | Chance Showers And Thunderstorms | 3 to 8 mph W | 47% |
| Monday | 81°F | Chance Rain Showers | 3 to 7 mph SW | 35% |
| Monday Night | 64°F | Chance Showers And Thunderstorms | 6 mph NNE | 40% |
Forecast source: National Weather Service (api.weather.gov) for Winchester (44.198, -88.660). Updated through the day.
Growing snapshot for Winchester
Last spring frost
May 4
First fall frost
Oct 6
Growing season
153 days
Hardiness zone
5b
More local growing data for Winchester: nearby ZIP 54947 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, New London, Wi (10.8 mi from Winchester). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.