Wilmington, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Wilmington, a city in Will County, Illinois.
Today
81°F
Showers And Thunderstorms
Showers and thunderstorms before 2pm, then a chance of showers and thunderstorms. Cloudy. High near 81, with temperatures falling to around 79 in the afternoon. Southeast wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Wilmington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Showers And Thunderstorms | 5 to 10 mph SE | 91% |
| Tonight | 66°F | Showers And Thunderstorms Likely | 5 mph SSW | 90% |
| Sunday | 73°F | Showers And Thunderstorms Likely | 10 to 15 mph NNE | 68% |
| Sunday Night | 57°F | Chance Showers And Thunderstorms | 15 mph NE | 44% |
| Monday | 66°F | Chance Rain Showers | 15 mph ENE | 51% |
| Monday Night | 53°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 43% |
| Tuesday | 65°F | Slight Chance Rain Showers | 10 to 15 mph NE | 19% |
| Tuesday Night | 52°F | Mostly Cloudy | 5 to 15 mph NE | 12% |
| Wednesday | 68°F | Partly Sunny | 5 to 10 mph NNE | 8% |
| Wednesday Night | 53°F | Mostly Cloudy | 5 mph NNE | 1% |
| Thursday | 70°F | Partly Sunny | 5 mph NNE | 3% |
| Thursday Night | 53°F | Mostly Cloudy | 0 to 5 mph NE | 3% |
| Friday | 73°F | Mostly Sunny | 0 to 5 mph NE | 3% |
| Friday Night | 53°F | Partly Cloudy | 0 to 5 mph NE | 2% |
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 Sep 19, 2026.