Fayetteville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fayetteville, a village in St. Clair County, Illinois.
This Afternoon
73°F
Rain
Rain and a slight chance of thunderstorms. Cloudy. High near 73, with temperatures falling to around 69 in the afternoon. South wind 17 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 90%.
7-day forecast for Fayetteville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Rain | 17 to 22 mph S | 89% |
| Tonight | 55°F | Rain | 7 to 15 mph S | 98% |
| Wednesday | 65°F | Chance Rain Showers then Mostly Cloudy | 5 to 12 mph SW | 11% |
| Wednesday Night | 43°F | Partly Cloudy | 3 mph SW | 0% |
| Thursday | 68°F | Sunny | 3 to 9 mph W | 0% |
| Thursday Night | 44°F | Mostly Cloudy | 3 mph NW | 6% |
| Friday | 59°F | Mostly Cloudy | 3 to 9 mph NW | 5% |
| Friday Night | 39°F | Mostly Cloudy | 1 to 5 mph N | 1% |
| Saturday | 56°F | Partly Sunny | 3 mph NW | 0% |
| Saturday Night | 35°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 62°F | Sunny | 0 to 6 mph W | 6% |
| Sunday Night | 35°F | Mostly Clear | 2 mph NW | 5% |
| Monday | 66°F | Sunny | 1 to 6 mph W | 2% |
| Monday Night | 40°F | Mostly Clear | 2 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Fayetteville (38.378, -89.797). Updated through the day.
Growing snapshot for Fayetteville
Last spring frost
Apr 12
First fall frost
Oct 22
Growing season
191 days
Hardiness zone
6b
More local growing data for Fayetteville: nearby ZIP 62255 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Sparta 1 W, Il (14 mi from Fayetteville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.