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
83°F
Slight Chance Showers And Thunderstorms
A chance of rain showers before 4pm, then a slight chance of showers and thunderstorms between 4pm and 5pm. Mostly sunny, with a high near 83. East northeast wind around 10 mph. Chance of precipitation is 40%.
7-day forecast for Clinton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 83°F | Slight Chance Showers And Thunderstorms | 10 mph ENE | 37% |
| Tonight | 69°F | Partly Cloudy | 10 mph ESE | 4% |
| Saturday | 89°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 9 mph SSW | 20% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 8 mph SSW | 26% |
| Sunday | 82°F | Rain Showers Likely | 6 to 16 mph N | 61% |
| Sunday Night | 60°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 14 to 18 mph NE | 63% |
| Monday | 69°F | Showers And Thunderstorms Likely | 16 to 20 mph NE | 63% |
| Monday Night | 54°F | Chance Showers And Thunderstorms | 15 to 20 mph NE | 54% |
| Tuesday | 67°F | Chance Rain Showers | 17 mph NE | 33% |
| Tuesday Night | 52°F | Mostly Cloudy | 9 to 17 mph NNE | 7% |
| Wednesday | 70°F | Partly Sunny | 10 to 14 mph NNE | 3% |
| Wednesday Night | 53°F | Mostly Cloudy | 6 to 13 mph NNE | 3% |
| Thursday | 71°F | Mostly Sunny | 7 to 12 mph NNE | 2% |
| Thursday Night | 54°F | Partly Cloudy | 6 to 12 mph NNE | 4% |
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 Sep 18, 2026.