Clayton, IL Weather & Growing Conditions
Overnight
73°F
Partly Cloudy
Partly cloudy, with a low around 73. South wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 73°F | Partly Cloudy | 7 mph S | 8% |
| Saturday | 91°F | Mostly Cloudy | 6 to 9 mph SW | 8% |
| Saturday Night | 69°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SW | 58% |
| Sunday | 79°F | Chance Showers And Thunderstorms | 3 to 10 mph N | 54% |
| Sunday Night | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 12 mph NE | 72% |
| Monday | 67°F | Showers And Thunderstorms Likely | 13 mph NE | 72% |
| Monday Night | 55°F | Chance Rain Showers | 12 mph NE | 35% |
| Tuesday | 64°F | Chance Rain Showers | 12 mph NE | 26% |
| Tuesday Night | 50°F | Partly Cloudy | 5 to 10 mph N | 4% |
| Wednesday | 68°F | Mostly Sunny | 8 mph N | 1% |
| Wednesday Night | 53°F | Partly Cloudy | 3 to 7 mph NE | 1% |
| Thursday | 71°F | Partly Sunny | 6 mph NE | 4% |
| Thursday Night | 56°F | Partly Cloudy | 5 mph NE | 4% |
| Friday | 73°F | Mostly Sunny | 3 to 7 mph NE | 7% |
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 Sep 19, 2026.