Donnellson, IL Weather & Growing Conditions
Tonight
70°F
Slight Chance Showers And Thunderstorms then Partly Cloudy
A slight chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 70. Southeast wind around 5 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SE | 23% |
| Saturday | 95°F | Mostly Sunny | 6 mph SW | 6% |
| Saturday Night | 70°F | Partly Cloudy | 3 mph S | 5% |
| Sunday | 91°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 1 to 6 mph NW | 23% |
| Sunday Night | 64°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 8 mph N | 52% |
| Monday | 78°F | Rain Showers Likely | 6 to 10 mph NE | 61% |
| Monday Night | 57°F | Showers And Thunderstorms Likely | 6 to 12 mph NE | 61% |
| Tuesday | 71°F | Slight Chance Rain Showers then Partly Sunny | 10 mph N | 24% |
| Tuesday Night | 52°F | Mostly Cloudy | 5 to 10 mph N | 4% |
| Wednesday | 74°F | Mostly Sunny | 8 mph N | 3% |
| Wednesday Night | 53°F | Partly Cloudy | 2 to 8 mph N | 3% |
| Thursday | 75°F | Mostly Sunny | 2 to 7 mph N | 3% |
| Thursday Night | 55°F | Partly Cloudy | 2 to 7 mph N | 3% |
| Friday | 76°F | Mostly Sunny | 3 to 7 mph N | 3% |
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 Sep 19, 2026.