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.
Today
62°F
Patchy Drizzle then Mostly Cloudy
Patchy drizzle before noon. Mostly cloudy, with a high near 62. West wind 6 to 10 mph.
7-day forecast for Prairie du Rocher
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 62°F | Patchy Drizzle then Mostly Cloudy | 6 to 10 mph W | 12% |
| Tonight | 42°F | Mostly Clear | 3 mph W | 0% |
| Thursday | 68°F | Sunny | 3 to 8 mph W | 0% |
| Thursday Night | 44°F | Partly Cloudy | 3 mph NW | 1% |
| Friday | 59°F | Partly Sunny | 5 to 10 mph N | 1% |
| Friday Night | 35°F | Partly Cloudy | 2 to 7 mph N | 0% |
| Saturday | 56°F | Mostly Sunny | 5 mph N | 0% |
| Saturday Night | 33°F | Partly Cloudy | 2 mph NW | 0% |
| Sunday | 62°F | Sunny | 1 to 6 mph NW | 1% |
| Sunday Night | 35°F | Clear | 2 mph W | 0% |
| Monday | 67°F | Sunny | 3 mph SW | 0% |
| Monday Night | 39°F | Clear | 2 mph SW | 0% |
| Tuesday | 70°F | Sunny | 3 mph W | 1% |
| Tuesday Night | 41°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.