South Wilmington, IL Weather & Growing Conditions
This Afternoon
73°F
Chance Rain
A chance of rain. Mostly cloudy. High near 73, with temperatures falling to around 69 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 | 15 to 20 mph S | 42% |
| Tonight | 59°F | Rain | 15 mph S | 84% |
| Wednesday | 64°F | Chance Rain then Mostly Cloudy | 15 mph SSW | 44% |
| Wednesday Night | 47°F | Mostly Cloudy | 10 mph SW | 7% |
| Thursday | 60°F | Mostly Cloudy | 10 to 15 mph WSW | 11% |
| Thursday Night | 42°F | Chance Rain | 5 mph WNW | 32% |
| Friday | 56°F | Slight Chance Rain | 5 to 10 mph NNW | 21% |
| Friday Night | 35°F | Partly Cloudy | 0 to 5 mph NNW | 6% |
| Saturday | 54°F | Mostly Sunny | 0 to 5 mph WNW | 6% |
| Saturday Night | 33°F | Partly Cloudy | 0 mph | 3% |
| Sunday | 59°F | Mostly Sunny | 0 to 5 mph W | 10% |
| Sunday Night | 33°F | Mostly Clear | 0 to 5 mph WNW | 9% |
| Monday | 64°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 South Wilmington, IL
Last spring frost
Apr 27
First fall frost
Oct 15
Growing season
170 days
Hardiness zone
5b
Explore more for South Wilmington, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Dwight, Il (8.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.