Fairview Heights, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fairview Heights, a city in St. Clair County, Illinois.
This Afternoon
98°F
Partly Sunny
Partly sunny, with a high near 98. Heat index values as high as 102. West wind around 8 mph.
7-day forecast for Fairview Heights
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 98°F | Partly Sunny | 8 mph W | 5% |
| Tonight | 74°F | Partly Cloudy | 6 mph SW | 2% |
| Sunday | 94°F | Partly Sunny | 3 to 7 mph W | 14% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 6 to 10 mph N | 68% |
| Monday | 81°F | Showers And Thunderstorms Likely | 6 to 9 mph NE | 68% |
| Monday Night | 62°F | Chance Showers And Thunderstorms | 6 to 10 mph NE | 44% |
| Tuesday | 72°F | Slight Chance Rain Showers then Partly Sunny | 8 to 12 mph N | 17% |
| Tuesday Night | 55°F | Mostly Cloudy | 6 to 12 mph N | 6% |
| Wednesday | 74°F | Mostly Sunny | 10 mph N | 2% |
| Wednesday Night | 56°F | Partly Cloudy | 3 to 9 mph N | 0% |
| Thursday | 76°F | Mostly Sunny | 5 to 8 mph N | 1% |
| Thursday Night | 58°F | Partly Cloudy | 3 to 8 mph NE | 3% |
| Friday | 78°F | Partly Sunny | 3 to 8 mph NE | 6% |
| Friday Night | 58°F | Partly Cloudy | 7 mph NE | 6% |
Forecast source: National Weather Service (api.weather.gov) for Fairview Heights (38.595, -90.005). Updated through the day.
Growing snapshot for Fairview Heights
Last spring frost
Apr 8
First fall frost
Oct 26
Growing season
200 days
Hardiness zone
7a
More local growing data for Fairview Heights: nearby ZIP 62208 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Cahokia St Louis Ap, Il (8.4 mi from Fairview Heights). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.