La Prairie, IL Weather & Growing Conditions
Today
90°F
Mostly Cloudy
Mostly cloudy, with a high near 90. Southwest wind 5 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Mostly Cloudy | 5 to 8 mph SW | 6% |
| Tonight | 69°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 mph SW | 57% |
| Sunday | 77°F | Chance Showers And Thunderstorms | 3 to 12 mph N | 54% |
| Sunday Night | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 12 mph NE | 71% |
| Monday | 66°F | Showers And Thunderstorms Likely | 10 to 14 mph NE | 71% |
| Monday Night | 55°F | Chance Rain Showers | 9 to 13 mph NE | 39% |
| Tuesday | 63°F | Chance Rain Showers | 12 mph NE | 26% |
| Tuesday Night | 50°F | Partly Cloudy | 5 to 9 mph NE | 4% |
| Wednesday | 67°F | Mostly Sunny | 8 mph N | 1% |
| Wednesday Night | 53°F | Partly Cloudy | 6 mph NE | 1% |
| Thursday | 70°F | Partly Sunny | 6 mph NE | 4% |
| Thursday Night | 56°F | Partly Cloudy | 5 mph NE | 4% |
| Friday | 72°F | Mostly Sunny | 3 to 7 mph NE | 7% |
| Friday Night | 56°F | Partly Cloudy | 6 mph NE | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for La Prairie, IL
Last spring frost
Apr 18
First fall frost
Oct 21
Growing season
187 days
Hardiness zone
6a
Explore more for La Prairie, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Golden, Il (5.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.