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City of Columbia, IllinoisColumbia, IL 7-Day Night Weather Forecast
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Columbia, IL Weather Forecast
Columbia, IL Weather Forecast Date: 152 AM CDT Sun Sep 13 2026
The area/counties/county of: Monroe County Il, Jefferson County Mo.or toggle through each period.
Rest of Tonight... Partly cloudy. Near steady temperature around 70. Light and variable winds.
Sunday... Partly sunny. Highs in the upper 80s. North winds around 5 mph.
Sunday Night... Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 60s. Northeast winds around 5 mph.
Monday... Mostly sunny. Highs in the upper 80s. East winds 5 to 10 mph.
Monday Night... Mostly clear. Lows in the lower 70s. Southeast winds 5 to 10 mph.
Tuesday... Sunny, hot with highs in the mid 90s. Heat index values up to 110.
Tuesday Night... Partly cloudy. A slight chance of showers and thunderstorms. Lows around 70. Highs in the mid 90s. Chance of rain 20%. Heat index values up to 105.
Wednesday... Partly cloudy. A slight chance of showers and thunderstorms. Lows around 70. Highs in the mid 90s. Chance of rain 20%. Heat index values up to 105.
Wednesday Night... Partly cloudy in the evening, then clearing. Lows in the lower 70s. Heat index values up to 100 early in the evening.
Thursday... Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 20%. Heat index values up to 105.
Thursday Night... Partly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Lows in the upper 60s. Chance of rain 30%. Heat index values up to 100 early in the evening.
Friday... Mostly sunny with a 20% chance of showers. Highs in the upper 80s.
Friday Night... Partly cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the lower 60s. Chance of rain 30%.
POP = Probability of Precipitation
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