Prairie du Rocher, IL Weather & Growing Conditions
Overnight
71°F
Clear
Clear, with a low around 71. Southeast wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 71°F | Clear | 3 mph SE | 3% |
| Saturday | 98°F | Mostly Sunny | 2 to 6 mph SW | 2% |
| Saturday Night | 71°F | Partly Cloudy | 5 mph S | 3% |
| Sunday | 94°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph W | 18% |
| Sunday Night | 66°F | Slight Chance Showers And Thunderstorms | 5 mph N | 50% |
| Monday | 81°F | Showers And Thunderstorms Likely | 3 to 7 mph N | 65% |
| Monday Night | 59°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 5 to 8 mph N | 65% |
| Tuesday | 72°F | Chance Showers And Thunderstorms then Partly Sunny | 7 to 10 mph N | 26% |
| Tuesday Night | 53°F | Mostly Cloudy | 5 to 10 mph N | 7% |
| Wednesday | 74°F | Mostly Sunny | 8 mph N | 2% |
| Wednesday Night | 53°F | Partly Cloudy | 2 to 7 mph N | 1% |
| Thursday | 76°F | Mostly Sunny | 2 to 7 mph N | 2% |
| Thursday Night | 56°F | Partly Cloudy | 2 to 6 mph N | 4% |
| Friday | 77°F | Partly Sunny | 2 to 7 mph NE | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Prairie du Rocher, IL
Last spring frost
Apr 8
First fall frost
Oct 30
Growing season
202 days
Hardiness zone
7a
Explore more for Prairie du Rocher, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Kaskaskia Rvr Navigation Lock, Il (14.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.