Clinton, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Clinton, a city in De Witt County, Illinois.
This Afternoon
72°F
Light Rain Likely
Rain likely and a slight chance of thunderstorms. Mostly cloudy, with a high near 72. South wind around 23 mph, with gusts as high as 36 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Clinton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Light Rain Likely | 23 mph S | 58% |
| Tonight | 54°F | Rain | 16 to 21 mph S | 78% |
| Wednesday | 61°F | Chance Light Rain then Mostly Cloudy | 17 mph SW | 25% |
| 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% |
Forecast source: National Weather Service (api.weather.gov) for Clinton (40.147, -88.963). Updated through the day.
Growing snapshot for Clinton
Last spring frost
Apr 20
First fall frost
Oct 16
Growing season
179 days
Hardiness zone
6a
More local growing data for Clinton: nearby ZIP 61727 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Lincoln, Il (20.4 mi from Clinton). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.