Wilmington, IL Weather & Growing Conditions
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. South southwest wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 5 to 10 mph SSW | 2% |
| Tonight | 66°F | Partly Cloudy | 5 mph S | 4% |
| Wednesday | 82°F | Chance Showers And Thunderstorms | 5 mph SW | 45% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 0 to 5 mph WSW | 86% |
| Thursday | 80°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 81% |
| Thursday Night | 63°F | Chance Showers And Thunderstorms | 0 to 5 mph SSE | 46% |
| Friday | 82°F | Mostly Sunny | 0 mph | 5% |
| Friday Night | 64°F | Mostly Clear | 0 mph | 9% |
| Saturday | 84°F | Mostly Sunny | 0 to 5 mph SSW | 12% |
| Saturday Night | 69°F | Partly Cloudy | 0 to 5 mph SSW | 12% |
| Sunday | 87°F | Mostly Sunny | 5 to 10 mph SW | 12% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 31% |
| Monday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 31% |
| Monday Night | 70°F | Chance Showers And Thunderstorms | 5 mph WSW | 39% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Wilmington, IL
Last spring frost
Apr 16
First fall frost
Oct 26
Growing season
191 days
Hardiness zone
5b
Explore more for Wilmington, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Channahon Dresden Isl Dam, Il (11.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.