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City of Belvidere, ILBelvidere, IL 7-Day Night Weather Forecast
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Belvidere, IL Weather Forecast
Belvidere, IL Weather Forecast Date: 120 PM CDT Thu Sep 10 2026
The area/counties/county of: Boone, including the city of Belvidere.or toggle through each period.
This Afternoon... Partly cloudy. Near steady temperature in the mid 70s. Northwest winds around 5 mph.
Tonight... Mostly clear. Patchy fog after midnight. Lows in the mid 50s. East winds around 5 mph in the evening, becoming light and variable.
Friday... Sunny. Patchy fog early in the morning. Highs in the upper 70s. South winds 5 to 10 mph.
Friday Night... Mostly clear in the evening, then becoming partly cloudy. Lows around 60. South winds around 5 mph.
Saturday... Mostly cloudy in the morning, then becoming partly cloudy. Highs in the lower 80s. Southwest winds 5 to 10 mph.
Saturday Night... Partly cloudy. Lows in the mid 50s.
Sunday... Partly cloudy in the morning, then mostly cloudy with a slight chance of showers in the afternoon. Highs in the mid 70s. Chance of precipitation 20%.
Sunday Night... Mostly cloudy with a slight chance of showers in the evening, then partly cloudy with a chance of showers after midnight. Lows in the mid 50s. Chance of precipitation 30%.
Monday... Mostly cloudy. A chance of showers in the morning. Highs in the upper 70s. Chance of precipitation 50%.
Monday Night... Mostly cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the mid 60s. Chance of precipitation 60%.
Tuesday... Mostly cloudy with a 50% chance of showers. Highs in the upper 70s.
Tuesday Night... Mostly cloudy with a 50% chance of showers. Lows in the mid 50s.
POP = Probability of Precipitation
Belvidere Radar Loop
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