Clayton, IL Weather & Growing Conditions
Tonight
52°F
Light Rain Likely then Chance Rain Showers
Rain likely before 11pm, then a chance of rain showers. Cloudy, with a low around 52. South wind 10 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Light Rain Likely then Chance Rain Showers | 10 to 16 mph S | 62% |
| Wednesday | 57°F | Chance Rain Showers then Cloudy | 13 to 17 mph SW | 12% |
| Wednesday Night | 44°F | Mostly Cloudy | 8 to 12 mph SW | 2% |
| Thursday | 58°F | Mostly Sunny | 9 to 14 mph W | 9% |
| Thursday Night | 43°F | Mostly Cloudy then Slight Chance T-storms | 5 to 8 mph NW | 19% |
| Friday | 54°F | Partly Sunny | 9 mph N | 6% |
| Friday Night | 37°F | Partly Cloudy | 1 to 7 mph N | 2% |
| Saturday | 54°F | Mostly Sunny | 1 to 5 mph NW | 1% |
| Saturday Night | 37°F | Mostly Clear | 3 mph W | 1% |
| Sunday | 60°F | Sunny | 3 to 8 mph W | 9% |
| Sunday Night | 37°F | Mostly Clear | 6 mph W | 4% |
| Monday | 64°F | Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 42°F | Mostly Clear | 7 mph W | 0% |
| Tuesday | 66°F | Sunny | 6 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Clayton, IL
Last spring frost
Apr 18
First fall frost
Oct 21
Growing season
187 days
Hardiness zone
6a
Explore more for Clayton, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Golden, Il (8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.