Clinton, IL Weather & Growing Conditions
Tonight
54°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. Low around 54, with temperatures rising to around 59 overnight. South wind 16 to 21 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Showers And Thunderstorms | 16 to 21 mph S | 96% |
| Wednesday | 61°F | Slight Chance Light Rain then Mostly Cloudy | 17 mph SW | 21% |
| Wednesday Night | 44°F | Mostly Cloudy | 14 mph SW | 1% |
| Thursday | 61°F | Mostly Sunny | 13 to 17 mph WSW | 5% |
| Thursday Night | 42°F | Mostly Cloudy then Slight Chance Light Rain | 6 to 10 mph WNW | 15% |
| Friday | 56°F | Slight Chance Light Rain then Mostly Cloudy | 9 to 14 mph NNW | 15% |
| Friday Night | 35°F | Mostly Cloudy | 5 to 13 mph N | 6% |
| Saturday | 54°F | Mostly Sunny | 7 mph NW | 2% |
| Saturday Night | 33°F | Partly Cloudy | 5 mph W | 2% |
| Sunday | 60°F | Sunny | 5 to 13 mph W | 11% |
| Sunday Night | 34°F | Mostly Clear | 5 to 10 mph WNW | 7% |
| Monday | 64°F | Sunny | 5 to 14 mph SW | 2% |
| Monday Night | 39°F | Mostly Clear | 7 to 12 mph WSW | 2% |
| Tuesday | 67°F | Sunny | 9 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Clinton, IL
Last spring frost
Apr 20
First fall frost
Oct 16
Growing season
179 days
Hardiness zone
6a
Explore more for Clinton, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Lincoln, Il (20.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.