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.
This Afternoon
99°F
Mostly Sunny
Mostly sunny, with a high near 99. Heat index values as high as 103. Southwest wind around 6 mph.
7-day forecast for East St. Louis
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 99°F | Mostly Sunny | 6 mph SW | 1% |
| Tonight | 75°F | Partly Cloudy | 5 mph S | 1% |
| Sunday | 95°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 3 to 7 mph W | 16% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 9 mph N | 70% |
| Monday | 82°F | Showers And Thunderstorms Likely | 5 to 9 mph NE | 70% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 5 to 9 mph NE | 46% |
| Tuesday | 74°F | Slight Chance Rain Showers then Mostly Cloudy | 7 to 10 mph N | 18% |
| Tuesday Night | 57°F | Mostly Cloudy | 5 to 10 mph N | 1% |
| Wednesday | 75°F | Mostly Sunny | 9 mph N | 0% |
| Wednesday Night | 57°F | Partly Cloudy | 2 to 9 mph N | 0% |
| Thursday | 77°F | Mostly Sunny | 2 to 7 mph N | 1% |
| Thursday Night | 60°F | Mostly Cloudy | 2 to 7 mph NE | 11% |
| Friday | 81°F | Slight Chance Rain Showers | 2 to 7 mph NE | 18% |
| Friday Night | 60°F | Slight Chance Rain Showers then Mostly Cloudy | 2 to 7 mph NE | 18% |
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 20, 2026.