Caseyville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Caseyville, a village in St. Clair County, Illinois.
This Afternoon
98°F
Partly Sunny
Partly sunny, with a high near 98. Heat index values as high as 102. Southwest wind around 7 mph.
7-day forecast for Caseyville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 98°F | Partly Sunny | 7 mph SW | 1% |
| Tonight | 75°F | Partly Cloudy | 6 mph S | 2% |
| Sunday | 94°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 3 to 7 mph W | 17% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph NE | 69% |
| Monday | 81°F | Showers And Thunderstorms Likely | 6 to 10 mph NE | 69% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 6 to 10 mph NE | 44% |
| Tuesday | 73°F | Slight Chance Rain Showers then Mostly Cloudy | 8 to 12 mph N | 17% |
| Tuesday Night | 56°F | Mostly Cloudy | 6 to 12 mph N | 1% |
| Wednesday | 74°F | Mostly Sunny | 7 to 10 mph N | 0% |
| Wednesday Night | 56°F | Partly Cloudy | 2 to 9 mph N | 0% |
| Thursday | 76°F | Mostly Sunny | 3 to 7 mph N | 1% |
| Thursday Night | 59°F | Mostly Cloudy then Slight Chance Rain Showers | 2 to 6 mph NE | 15% |
| Friday | 80°F | Slight Chance Rain Showers | 3 to 7 mph NE | 17% |
| Friday Night | 59°F | Slight Chance Rain Showers then Partly Cloudy | 3 to 7 mph NE | 17% |
Forecast source: National Weather Service (api.weather.gov) for Caseyville (38.629, -90.034). Updated through the day.
Growing snapshot for Caseyville
Last spring frost
Apr 8
First fall frost
Oct 26
Growing season
200 days
Hardiness zone
7a
More local growing data for Caseyville: nearby ZIP 62232 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Cahokia St Louis Ap, Il (9.2 mi from Caseyville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.