Caseyville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Caseyville, a village in St. Clair County, Illinois.
Overnight
74°F
Clear
Clear, with a low around 74. South wind around 5 mph.
7-day forecast for Caseyville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 74°F | Clear | 5 mph S | 4% |
| Saturday | 98°F | Mostly Sunny | 3 to 8 mph SW | 5% |
| Saturday Night | 74°F | Partly Cloudy | 6 mph S | 4% |
| Sunday | 94°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 7 mph W | 27% |
| Sunday Night | 68°F | Showers And Thunderstorms Likely | 6 to 10 mph NE | 59% |
| Monday | 79°F | Showers And Thunderstorms Likely | 7 to 12 mph NE | 64% |
| Monday Night | 60°F | Chance Showers And Thunderstorms | 7 to 13 mph NE | 51% |
| Tuesday | 72°F | Slight Chance Rain Showers then Partly Sunny | 13 mph N | 19% |
| Tuesday Night | 55°F | Mostly Cloudy | 6 to 13 mph N | 6% |
| Wednesday | 74°F | Mostly Sunny | 10 mph N | 2% |
| Wednesday Night | 56°F | Partly Cloudy | 3 to 10 mph N | 0% |
| Thursday | 77°F | Mostly Sunny | 5 to 9 mph N | 1% |
| Thursday Night | 58°F | Partly Cloudy | 3 to 9 mph NE | 3% |
| Friday | 78°F | Partly Sunny | 3 to 9 mph NE | 6% |
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
Nearby towns & communities
Belleville
Brooklyn
Cahokia Heights
Darmstadt
Dupo
East St. Louis
Fairmont City
Fairview Heights
Fayetteville
Floraville
Freeburg
Lebanon
Lenzburg
Marissa
Mascoutah
Millstadt
New Athens
O'Fallon
Paderborn
Rentchler
Sauget
Scott AFB
Shiloh
Smithton
St. Libory
Summerfield
Swansea
Washington Park
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.