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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

WhenTempForecastWindPrecip
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

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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.