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Belknap, IL 7-Day Night Weather Forecast
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Belknap, IL Weather Forecast
Belknap, IL Weather Forecast Date: 507 AM CDT Fri Sep 18 2026
The area/counties/county of: Johnson, including the city of Vienna.or toggle through each period.
Today... Sunny, hot with highs in the upper 90s. Calm winds, becoming west around 5 mph this afternoon.
Tonight... Mostly cloudy with a slight chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the lower 70s. Calm winds. Chance of rain 20%.
Saturday... Sunny, hot with highs in the mid 90s. Southwest winds around 5 mph.
Saturday Night... Partly cloudy. Lows in the lower 70s. South winds around 5 mph.
Sunday... Mostly sunny. Hot with highs in the mid 90s. West winds around 5 mph.
Sunday Night... Partly cloudy. Lows around 70.
Monday... Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs around 90. Chance of rain 50%.
Monday Night... Partly cloudy. A chance of showers in the evening. Lows in the mid 60s. Chance of rain 50%.
Tuesday... Partly sunny. Highs in the upper 70s.
Tuesday Night... Partly cloudy. Lows in the upper 50s. Highs in the mid 70s.
Wednesday... Partly cloudy. Lows in the upper 50s. Highs in the mid 70s.
Wednesday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 50s.
POP = Probability of Precipitation
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