Wilmington, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Wilmington, a village in Greene County, Illinois.
This Afternoon
91°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 3pm. Sunny, with a high near 91. Heat index values as high as 100. East wind around 3 mph. Chance of precipitation is 20%.
7-day forecast for Wilmington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 91°F | Slight Chance Showers And Thunderstorms | 3 mph E | 21% |
| Tonight | 71°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 6 mph SE | 19% |
| Saturday | 95°F | Partly Sunny | 7 mph SW | 8% |
| Saturday Night | 69°F | Partly Cloudy then Chance Rain Showers | 5 mph SW | 22% |
| Sunday | 87°F | Showers And Thunderstorms Likely | 2 to 7 mph NW | 66% |
| Sunday Night | 62°F | Showers And Thunderstorms Likely | 6 to 10 mph NE | 67% |
| Monday | 73°F | Showers And Thunderstorms Likely | 7 to 12 mph NE | 68% |
| Monday Night | 56°F | Chance Showers And Thunderstorms | 7 to 12 mph NE | 46% |
| Tuesday | 68°F | Chance Rain Showers then Mostly Cloudy | 10 mph NE | 29% |
| Tuesday Night | 51°F | Mostly Cloudy | 5 to 10 mph N | 4% |
| Wednesday | 72°F | Mostly Sunny | 5 to 8 mph N | 0% |
| Wednesday Night | 53°F | Partly Cloudy | 2 to 6 mph NE | 0% |
| Thursday | 73°F | Mostly Sunny | 2 to 6 mph N | 4% |
| Thursday Night | 55°F | Partly Cloudy | 5 mph NE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Wilmington (39.481, -90.487). Updated through the day.
Growing snapshot for Wilmington
Last spring frost
Apr 13
First fall frost
Oct 22
Growing season
190 days
Hardiness zone
6a
More local growing data for Wilmington: nearby ZIP 62078 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, White Hall 1 E, Il (6.4 mi from Wilmington). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.