Wilmington, IL Weather & Growing Conditions
This Afternoon
73°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. High near 73, with temperatures falling to around 70 in the afternoon. South wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Chance Rain Showers | 15 to 20 mph S | 40% |
| Tonight | 60°F | Rain Showers | 15 mph S | 84% |
| Wednesday | 64°F | Chance Rain Showers then Mostly Cloudy | 15 mph SSW | 46% |
| Wednesday Night | 48°F | Mostly Cloudy | 10 to 15 mph SW | 7% |
| Thursday | 60°F | Mostly Cloudy | 10 to 15 mph WSW | 13% |
| Thursday Night | 42°F | Chance Rain Showers | 5 mph WNW | 34% |
| Friday | 55°F | Slight Chance Rain Showers | 5 to 10 mph NNW | 21% |
| Friday Night | 35°F | Partly Cloudy | 0 to 5 mph NNW | 8% |
| Saturday | 53°F | Mostly Sunny | 0 to 5 mph WNW | 7% |
| Saturday Night | 33°F | Partly Cloudy | 0 mph | 3% |
| Sunday | 58°F | Mostly Sunny | 0 to 10 mph W | 11% |
| Sunday Night | 34°F | Mostly Clear | 0 to 5 mph WNW | 9% |
| Monday | 63°F | Sunny | 0 to 10 mph WSW | 4% |
| Monday Night | 38°F | Mostly Clear | 5 mph WSW | 2% |
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 Nov 3, 2026.