Wilmington, IL Weather & Growing Conditions
This Afternoon
72°F
Light Rain Likely
Rain likely and a slight chance of thunderstorms. Cloudy. High near 72, with temperatures falling to around 64 in the afternoon. Southeast wind around 18 mph, with gusts as high as 31 mph. Chance of precipitation is 70%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Light Rain Likely | 18 mph SE | 74% |
| Tonight | 52°F | Light Rain | 9 to 16 mph S | 80% |
| Wednesday | 61°F | Chance Rain Showers then Cloudy | 10 to 14 mph SW | 12% |
| Wednesday Night | 42°F | Partly Cloudy | 8 mph SW | 0% |
| Thursday | 63°F | Mostly Sunny | 7 to 12 mph W | 6% |
| Thursday Night | 41°F | Mostly Cloudy then Slight Chance T-storms | 6 mph NW | 21% |
| Friday | 57°F | Mostly Cloudy | 6 to 9 mph N | 7% |
| Friday Night | 36°F | Mostly Cloudy | 1 to 7 mph N | 1% |
| Saturday | 56°F | Mostly Sunny | 3 mph NW | 0% |
| Saturday Night | 34°F | Mostly Clear | 2 mph W | 2% |
| Sunday | 62°F | Sunny | 2 to 7 mph W | 7% |
| Sunday Night | 35°F | Mostly Clear | 5 mph W | 4% |
| Monday | 66°F | Sunny | 3 to 8 mph SW | 2% |
| Monday Night | 39°F | Mostly Clear | 5 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Wilmington, IL
Last spring frost
Apr 13
First fall frost
Oct 22
Growing season
190 days
Hardiness zone
6a
Explore more for Wilmington, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, White Hall 1 E, Il (6.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.