Wilmington, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Wilmington, a city in Will County, Illinois.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. South southwest wind 5 to 10 mph.
7-day forecast for Wilmington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 5 to 10 mph SSW | 1% |
| Tonight | 66°F | Partly Cloudy | 5 mph S | 6% |
| Wednesday | 82°F | Chance Showers And Thunderstorms | 5 mph SW | 48% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 0 to 5 mph WSW | 88% |
| Thursday | 80°F | Showers And Thunderstorms Likely | 0 to 5 mph SSE | 81% |
| Thursday Night | 63°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph E | 44% |
| Friday | 83°F | Mostly Sunny | 0 to 5 mph SSE | 4% |
| Friday Night | 64°F | Mostly Clear | 0 mph | 9% |
| Saturday | 85°F | Mostly Sunny | 0 to 5 mph SSW | 12% |
| Saturday Night | 69°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 0 to 5 mph SSW | 15% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 10 mph SW | 15% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 5 mph SSW | 31% |
| Monday | 87°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 mph SSW | 31% |
| Monday Night | 70°F | Chance Showers And Thunderstorms | 5 mph WSW | 39% |
Forecast source: National Weather Service (api.weather.gov) for Wilmington (41.319, -88.160). Updated through the day.
Growing snapshot for Wilmington
Last spring frost
Apr 16
First fall frost
Oct 26
Growing season
191 days
Hardiness zone
5b
More local growing data for Wilmington: nearby ZIP 60481 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Channahon Dresden Isl Dam, Il (11.8 mi from Wilmington). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.