Weather World
Grand Detour, IL 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Grand Detour, IL Weather Forecast
Grand Detour, IL Weather Forecast Date: 256 AM CDT Sun Aug 23 2026
The area/counties/county of: Lee, including the city of Dixon.or toggle through each period.
Early This Morning... Clear. Temperatures in the upper 50s. Northwest winds around 5 mph.
Today... Sunny in the morning, then becoming partly cloudy. Highs in the mid 70s. Northwest winds 5 to 10 mph.
Tonight... Mostly clear. Lows in the mid 50s. West winds around 5 mph.
Monday... Partly cloudy. Highs in the upper 70s. Northwest winds around 5 mph.
Monday Night... Mostly clear. Lows in the mid 50s. Northeast winds around 5 mph, becoming southeast after midnight.
Tuesday... Partly cloudy. Highs in the upper 70s. South winds around 5 mph.
Tuesday Night... Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the lower 60s. Chance of precipitation 20%.
Wednesday... Partly cloudy. A chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of precipitation 50%.
Wednesday Night... Mostly clear. Lows in the lower 60s.
Thursday... Mostly sunny. Highs around 80.
Thursday Night... Mostly clear. Lows around 60.
Friday... Mostly sunny in the morning, then becoming partly cloudy. Highs around 80.
Friday Night... Mostly clear. Lows around 60.
POP = Probability of Precipitation
Grand Detour Radar Loop
Use the map search tool if you want to place a location marker on the radar map...