Winchester, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winchester, a community in Winnebago County, Wisconsin.
Today
64°F
Rain Showers Likely
Rain showers likely before 1pm, then showers and thunderstorms likely. Cloudy, with a high near 64. East wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Winchester
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 64°F | Rain Showers Likely | 10 mph E | 72% |
| Tonight | 53°F | Showers And Thunderstorms Likely | 10 mph NE | 65% |
| Sunday | 66°F | Mostly Sunny | 10 to 14 mph NE | 7% |
| Sunday Night | 48°F | Mostly Cloudy | 9 to 13 mph NE | 1% |
| Monday | 61°F | Mostly Cloudy | 9 to 13 mph NE | 2% |
| Monday Night | 46°F | Mostly Cloudy | 7 to 10 mph NE | 2% |
| Tuesday | 62°F | Mostly Sunny | 7 to 12 mph NE | 2% |
| Tuesday Night | 45°F | Mostly Clear | 5 to 8 mph NE | 2% |
| Wednesday | 64°F | Sunny | 5 to 10 mph NE | 1% |
| Wednesday Night | 47°F | Mostly Clear | 2 to 6 mph NE | 1% |
| Thursday | 67°F | Mostly Sunny | 3 to 7 mph NE | 2% |
| Thursday Night | 48°F | Partly Cloudy | 1 to 5 mph NE | 2% |
| Friday | 70°F | Mostly Sunny | 5 mph ENE | 3% |
| Friday Night | 49°F | Partly Cloudy | 3 mph ENE | 3% |
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 Sep 19, 2026.