Cahokia Heights, IL Weather & Growing Conditions
Overnight
74°F
Mostly Clear
Mostly clear, with a low around 74. Southeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 74°F | Mostly Clear | 5 mph SE | 3% |
| Saturday | 100°F | Mostly Sunny | 3 to 8 mph SW | 5% |
| Saturday Night | 75°F | Partly Cloudy | 5 mph S | 4% |
| Sunday | 95°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 2 to 6 mph W | 28% |
| Sunday Night | 69°F | Showers And Thunderstorms Likely | 5 to 9 mph NE | 62% |
| Monday | 80°F | Showers And Thunderstorms Likely | 6 to 10 mph NE | 64% |
| Monday Night | 61°F | Chance Showers And Thunderstorms | 6 to 10 mph N | 53% |
| Tuesday | 73°F | Slight Chance Rain Showers then Partly Sunny | 8 to 12 mph N | 20% |
| Tuesday Night | 56°F | Mostly Cloudy | 5 to 12 mph N | 5% |
| Wednesday | 75°F | Mostly Sunny | 9 mph N | 1% |
| Wednesday Night | 57°F | Partly Cloudy | 2 to 8 mph N | 0% |
| Thursday | 77°F | Mostly Sunny | 2 to 7 mph N | 1% |
| Thursday Night | 59°F | Partly Cloudy | 2 to 7 mph NE | 4% |
| Friday | 79°F | Partly Sunny | 3 to 7 mph NE | 6% |
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 (0.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.