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
87°F
Sunny
Sunny, with a high near 87. Southeast wind 0 to 3 mph.
7-day forecast for Prairie du Rocher
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Sunny | 0 to 3 mph SE | 0% |
| Tonight | 66°F | Mostly Clear | 3 mph SE | 0% |
| Wednesday | 91°F | Sunny | 1 to 5 mph S | 3% |
| Wednesday Night | 70°F | Partly Cloudy then Chance Showers And Thunderstorms | 6 mph S | 42% |
| Thursday | 88°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph S | 63% |
| Thursday Night | 69°F | Chance Showers And Thunderstorms | 3 mph S | 53% |
| Friday | 88°F | Chance Showers And Thunderstorms | 3 mph SW | 53% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 2 mph SW | 40% |
| Saturday | 89°F | Chance Showers And Thunderstorms | 3 mph S | 40% |
| Saturday Night | 71°F | Partly Cloudy | 5 mph S | 11% |
| Sunday | 92°F | Sunny | 6 mph S | 7% |
| Sunday Night | 72°F | Mostly Clear | 7 mph S | 5% |
| Monday | 94°F | Sunny | 7 mph SW | 5% |
| Monday Night | 73°F | Mostly Clear | 7 mph SW | 8% |
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 Aug 4, 2026.