Cahokia Heights, IL Weather & Growing Conditions
Tonight
74°F
Partly Cloudy
Partly cloudy, with a low around 74. Southwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 74°F | Partly Cloudy | 6 mph SW | 2% |
| Sunday | 94°F | Mostly Sunny | 6 mph W | 11% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 8 mph NE | 70% |
| Monday | 81°F | Showers And Thunderstorms Likely | 8 mph NE | 70% |
| Monday Night | 61°F | Chance Showers And Thunderstorms | 6 to 9 mph NE | 46% |
| Tuesday | 73°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph N | 18% |
| Tuesday Night | 56°F | Mostly Cloudy | 6 to 10 mph N | 1% |
| Wednesday | 74°F | Mostly Sunny | 9 mph N | 0% |
| Wednesday Night | 56°F | Partly Cloudy | 2 to 8 mph N | 0% |
| Thursday | 76°F | Mostly Sunny | 6 mph N | 1% |
| Thursday Night | 59°F | Mostly Cloudy | 5 mph NE | 7% |
| Friday | 80°F | Slight Chance Rain Showers | 2 to 7 mph NE | 17% |
| Friday Night | 59°F | Slight Chance Rain Showers then Mostly Cloudy | 6 mph NE | 17% |
| Saturday | 82°F | Mostly Sunny | 5 mph NE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Cahokia Heights, IL
Last spring frost
Apr 8
First fall frost
Oct 26
Growing season
200 days
Hardiness zone
7a
Explore more for Cahokia Heights, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Cahokia St Louis Ap, Il (3.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.