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East St. Louis, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for East St. Louis, a city in St. Clair County, Illinois.

Today
99°F
Partly Sunny
Partly sunny, with a high near 99. Heat index values as high as 102. Southwest wind 3 to 8 mph.

7-day forecast for East St. Louis

WhenTempForecastWindPrecip
Today 99°F Partly Sunny 3 to 8 mph SW 3%
Tonight 75°F Partly Cloudy 5 mph S 4%
Sunday 95°F Chance Rain Showers then Slight Chance Showers And Thunderstorms 3 to 7 mph W 28%
Sunday Night 69°F Showers And Thunderstorms Likely 5 to 9 mph NE 61%
Monday 80°F Showers And Thunderstorms Likely 5 to 12 mph NE 64%
Monday Night 61°F Chance Showers And Thunderstorms 6 to 12 mph NE 51%
Tuesday 73°F Slight Chance Rain Showers then Partly Sunny 12 mph N 19%
Tuesday Night 56°F Mostly Cloudy 5 to 12 mph N 5%
Wednesday 75°F Mostly Sunny 7 to 10 mph N 1%
Wednesday Night 57°F Partly Cloudy 3 to 9 mph N 0%
Thursday 78°F Mostly Sunny 3 to 8 mph N 1%
Thursday Night 59°F Partly Cloudy 2 to 8 mph NE 3%
Friday 79°F Partly Sunny 3 to 8 mph NE 6%
Friday Night 59°F Partly Cloudy 3 to 8 mph NE 6%

Forecast source: National Weather Service (api.weather.gov) for East St. Louis (38.616, -90.131). Updated through the day.

Growing snapshot for East St. Louis

Last spring frost
Apr 8
First fall frost
Oct 26
Growing season
200 days
Hardiness zone
7a

More local growing data for East St. Louis: nearby ZIP 62205 weather · frost dates · planting calendar · Illinois frost dates

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Climate data from the nearest NOAA station, Cahokia St Louis Ap, Il (3 mi from East St. Louis). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.