Donnellson, IL Weather & Growing Conditions
Today
86°F
Sunny
Sunny, with a high near 86. South wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Sunny | 3 mph S | 0% |
| Tonight | 64°F | Mostly Clear | 1 to 5 mph SE | 0% |
| Wednesday | 87°F | Sunny | 0 to 5 mph S | 9% |
| Wednesday Night | 68°F | Slight Chance Showers And Thunderstorms | 3 mph S | 62% |
| Thursday | 83°F | Showers And Thunderstorms Likely | 5 mph SW | 74% |
| Thursday Night | 67°F | Chance Showers And Thunderstorms | 0 to 3 mph SE | 44% |
| Friday | 84°F | Chance Showers And Thunderstorms then Partly Sunny | 3 mph SW | 31% |
| Friday Night | 67°F | Chance Showers And Thunderstorms | 2 mph SW | 28% |
| Saturday | 86°F | Chance Showers And Thunderstorms | 3 mph S | 28% |
| Saturday Night | 70°F | Mostly Clear | 5 mph S | 12% |
| Sunday | 88°F | Sunny | 5 to 9 mph S | 6% |
| Sunday Night | 72°F | Mostly Clear | 5 to 8 mph S | 5% |
| Monday | 90°F | Sunny | 5 to 8 mph SW | 7% |
| Monday Night | 73°F | Slight Chance Showers And Thunderstorms | 7 mph S | 17% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Donnellson, IL
Last spring frost
Apr 13
First fall frost
Oct 24
Growing season
192 days
Hardiness zone
6b
Explore more for Donnellson, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Hillsboro, Il (10.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.