Caseyville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Caseyville, a village in St. Clair County, Illinois.
Tonight
55°F
Chance Light Rain
A chance of rain before 3am, then a slight chance of drizzle. Mostly cloudy, with a low around 55. Southwest wind 8 to 12 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.
7-day forecast for Caseyville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Chance Light Rain | 8 to 12 mph SW | 50% |
| Wednesday | 63°F | Slight Chance Drizzle then Mostly Cloudy | 7 to 14 mph W | 11% |
| Wednesday Night | 46°F | Partly Cloudy | 6 mph W | 0% |
| Thursday | 65°F | Sunny | 6 to 10 mph W | 1% |
| Thursday Night | 46°F | Mostly Cloudy | 6 mph NW | 8% |
| Friday | 59°F | Mostly Cloudy | 6 to 10 mph NW | 6% |
| Friday Night | 41°F | Partly Cloudy | 2 to 7 mph N | 1% |
| Saturday | 57°F | Partly Sunny | 5 mph NW | 0% |
| Saturday Night | 38°F | Partly Cloudy | 1 mph NW | 0% |
| Sunday | 62°F | Sunny | 1 to 7 mph W | 8% |
| Sunday Night | 38°F | Mostly Clear | 5 mph W | 5% |
| Monday | 67°F | Sunny | 2 to 7 mph SW | 2% |
| Monday Night | 43°F | Mostly Clear | 5 mph SW | 1% |
| Tuesday | 69°F | Sunny | 6 mph W | 0% |
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 Nov 4, 2026.