Winchester, IL Weather & Growing Conditions
Overnight
54°F
Mostly Cloudy
Mostly cloudy, with a low around 54. Southwest wind around 10 mph, with gusts as high as 23 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Mostly Cloudy | 10 mph SW | 12% |
| Wednesday | 59°F | Patchy Drizzle | 10 to 15 mph WSW | 10% |
| Wednesday Night | 45°F | Patchy Drizzle then Mostly Cloudy | 10 mph WSW | 10% |
| Thursday | 60°F | Partly Sunny | 9 to 14 mph W | 3% |
| Thursday Night | 42°F | Mostly Cloudy | 3 to 7 mph NW | 6% |
| Friday | 55°F | Partly Sunny | 9 mph NNW | 2% |
| Friday Night | 32°F | Partly Cloudy | 0 to 6 mph N | 0% |
| Saturday | 55°F | Mostly Sunny | 0 to 3 mph NNW | 0% |
| Saturday Night | 32°F | Partly Cloudy | 1 mph WNW | 0% |
| Sunday | 60°F | Sunny | 1 to 6 mph WNW | 2% |
| Sunday Night | 33°F | Clear | 2 mph WSW | 0% |
| Monday | 65°F | Sunny | 0 to 6 mph SW | 0% |
| Monday Night | 38°F | Clear | 3 mph SW | 0% |
| Tuesday | 67°F | Sunny | 3 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Winchester, IL
Last spring frost
Apr 18
First fall frost
Oct 20
Growing season
183 days
Hardiness zone
6a
Explore more for Winchester, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Winchester, Il (1.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.