Weather World
Cottagegrove, IL 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Cottagegrove, IL Weather Forecast
Cottagegrove, IL Weather Forecast Date: 147 AM CDT Fri Oct 02 2026
The area/counties/county of: Saline, including the city of Harrisburg.or toggle through each period.
Overnight... Showers. Near steady temperature in the lower 70s. West winds around 5 mph. Chance of rain 90%.
Friday... Showers. Much cooler with highs in the lower 70s. North winds 5 to 10 mph. Chance of rain near 100%.
Friday Night... Mostly cloudy. Cooler. Less humid with lows in the lower 50s. Northeast winds 5 to 10 mph.
Saturday... Mostly sunny. Highs in the mid 70s. Northeast winds 5 to 10 mph.
Saturday Night... Mostly cloudy. Lows in the lower 50s. Northeast winds around 5 mph in the evening, becoming light and variable.
Sunday... Mostly sunny. Highs in the upper 70s.
Sunday Night... Mostly clear. Lows around 50.
Monday... Clear. Highs in the lower 70s. Lows in the mid 40s.
Tuesday... Clear. Highs in the lower 70s. Lows in the mid 40s.
Wednesday... Mostly clear. Highs in the upper 70s. Lows around 50.
Wednesday Night... Mostly clear. Highs in the upper 70s. Lows around 50.
POP = Probability of Precipitation
Cottagegrove Radar Loop
Use the map search tool if you want to place a location marker on the radar map...