Winchester, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winchester, a community in Winnebago County, Wisconsin.
This Afternoon
68°F
Scattered Rain Showers
Scattered rain showers before 3pm, then patchy fog and scattered rain showers. Cloudy. High near 68, with temperatures falling to around 66 in the afternoon. South wind around 13 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Winchester
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Scattered Rain Showers | 13 mph S | 49% |
| Tonight | 58°F | Rain Showers | 12 mph SSE | 91% |
| Wednesday | 64°F | Rain Showers | 10 to 15 mph S | 89% |
| Wednesday Night | 47°F | Rain Showers Likely | 14 mph SW | 69% |
| Thursday | 53°F | Rain Showers | 8 to 12 mph WNW | 87% |
| Thursday Night | 38°F | Chance Rain Showers then Mostly Cloudy | 14 mph N | 40% |
| Friday | 47°F | Slight Chance Rain Showers then Partly Sunny | 8 to 14 mph N | 15% |
| Friday Night | 31°F | Partly Cloudy | 1 to 5 mph NNW | 3% |
| Saturday | 50°F | Mostly Sunny | 1 to 5 mph W | 1% |
| Saturday Night | 34°F | Partly Cloudy | 5 mph WSW | 11% |
| Sunday | 55°F | Mostly Sunny then Slight Chance Rain Showers | 5 to 10 mph W | 15% |
| Sunday Night | 35°F | Mostly Clear | 7 mph W | 3% |
| Monday | 57°F | Mostly Sunny | 5 to 12 mph SW | 1% |
| Monday Night | 39°F | Partly Cloudy | 8 mph W | 0% |
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 Nov 3, 2026.