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.
Overnight
65°F
Clear
Clear, with a low around 65. Southeast wind around 2 mph.
7-day forecast for Fairview Heights
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 65°F | Clear | 2 mph SE | 0% |
| Tuesday | 88°F | Sunny | 1 to 5 mph S | 0% |
| Tuesday Night | 68°F | Mostly Clear | 2 to 6 mph SE | 0% |
| Wednesday | 90°F | Sunny | 2 to 7 mph S | 7% |
| Wednesday Night | 72°F | Slight Chance Showers And Thunderstorms | 7 mph S | 63% |
| Thursday | 87°F | Showers And Thunderstorms Likely | 7 mph S | 71% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms | 5 mph SE | 43% |
| Friday | 87°F | Chance Showers And Thunderstorms | 5 mph SW | 43% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 5 mph SW | 36% |
| Saturday | 89°F | Chance Showers And Thunderstorms then Mostly Sunny | 5 mph S | 36% |
| Saturday Night | 73°F | Partly Cloudy | 7 mph S | 8% |
| Sunday | 92°F | Sunny | 8 mph S | 7% |
| Sunday Night | 74°F | Mostly Clear | 6 to 9 mph S | 5% |
| Monday | 93°F | Sunny | 6 to 9 mph SW | 5% |
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 Aug 4, 2026.