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Brighton, IL Weather Forecast
Brighton, IL Weather Forecast Date: 228 PM CDT Mon Sep 28 2026
The area/counties/county of: Greene County Il, Jersey County Il.or toggle through each period.
This Afternoon... Sunny. Near steady temperature in the upper 70s. North winds around 5 mph.
Tonight... Clear. Lows in the lower 50s. Northeast winds around 5 mph in the evening, becoming light and variable.
Tuesday... Sunny. Highs in the lower 80s. Southeast winds around 5 mph.
Tuesday Night... Partly cloudy. Not as cool with lows in the lower 60s. Southeast winds around 5 mph.
Wednesday... Partly sunny. Highs in the upper 80s. South winds 5 to 10 mph.
Wednesday Night... Mostly cloudy. A slight chance of showers after midnight. Lows in the upper 60s. Chance of rain 20%.
Thursday... Mostly cloudy. A chance of showers in the morning, then showers likely with a slight chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 70%.
Thursday Night... Showers likely. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. Lows around 60. Chance of rain 70%.
Friday... A slight chance of thunderstorms. Showers likely, mainly in the morning. Cooler with highs around 70. Chance of rain 70%.
Friday Night... Mostly cloudy with a 50% chance of showers. Lows in the mid 50s.
Saturday... Partly sunny with a 40% chance of showers. Highs in the lower 70s.
Saturday Night... Mostly cloudy with a 20% chance of showers. Lows in the mid 50s.
POP = Probability of Precipitation
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