Prairie du Rocher, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Prairie du Rocher, a village in Randolph County, Illinois.
This Afternoon
62°F
Mostly Cloudy
Mostly cloudy, with a high near 62. West wind 5 to 9 mph.
7-day forecast for Prairie du Rocher
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 62°F | Mostly Cloudy | 5 to 9 mph W | 0% |
| Tonight | 43°F | Mostly Clear | 3 mph SW | 0% |
| Thursday | 66°F | Sunny | 3 to 8 mph W | 3% |
| Thursday Night | 43°F | Mostly Cloudy | 5 mph NW | 13% |
| Friday | 56°F | Partly Sunny | 5 to 10 mph N | 9% |
| Friday Night | 32°F | Mostly Clear | 2 to 7 mph N | 0% |
| Saturday | 54°F | Mostly Sunny | 3 mph N | 0% |
| Saturday Night | 31°F | Mostly Clear | 1 mph NW | 0% |
| Sunday | 60°F | Sunny | 3 mph NW | 0% |
| Sunday Night | 33°F | Mostly Clear | 1 mph NW | 0% |
| Monday | 66°F | Sunny | 3 mph SW | 0% |
| Monday Night | 38°F | Clear | 2 mph SW | 1% |
| Tuesday | 67°F | Sunny | 3 mph W | 1% |
| Tuesday Night | 40°F | Mostly Clear | 2 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Prairie du Rocher (38.082, -90.098). Updated through the day.
Growing snapshot for Prairie du Rocher
Last spring frost
Apr 8
First fall frost
Oct 30
Growing season
202 days
Hardiness zone
7a
More local growing data for Prairie du Rocher: nearby ZIP 62277 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Kaskaskia Rvr Navigation Lock, Il (11.9 mi from Prairie du Rocher). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.