Prairie du Rocher, IL Weather & Growing Conditions
Tonight
53°F
Rain Likely
Rain likely before 2am, then a slight chance of drizzle between 2am and 5am. Mostly cloudy, with a low around 53. South wind 7 to 10 mph. Chance of precipitation is 70%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Rain Likely | 7 to 10 mph S | 74% |
| Wednesday | 65°F | Partly Sunny | 6 to 10 mph W | 3% |
| Wednesday Night | 43°F | Mostly Clear | 3 mph W | 0% |
| Thursday | 67°F | Sunny | 3 to 8 mph W | 1% |
| Thursday Night | 44°F | Mostly Cloudy | 3 mph NW | 8% |
| Friday | 59°F | Partly Sunny | 5 to 9 mph NW | 2% |
| Friday Night | 39°F | Partly Cloudy | 2 to 6 mph N | 0% |
| Saturday | 57°F | Partly Sunny | 3 mph NW | 0% |
| Saturday Night | 35°F | Partly Cloudy | 1 mph NW | 1% |
| Sunday | 63°F | Sunny | 1 to 6 mph W | 6% |
| Sunday Night | 36°F | Mostly Clear | 3 mph W | 5% |
| Monday | 67°F | Sunny | 2 to 6 mph W | 1% |
| Monday Night | 40°F | Mostly Clear | 3 mph SW | 0% |
| Tuesday | 70°F | Sunny | 5 mph W | 0% |
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 (11.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.