Weather WorldUpper Flat Lake, IL 7-Day Night Weather Forecast
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Upper Flat Lake, IL Weather Forecast
Upper Flat Lake, IL Weather Forecast Date: 854 AM CDT Fri Oct 30 2026
The area/counties/county of: Greene County Il, Jersey County Il.or toggle through each period.
Today... Partly sunny this morning, then becoming mostly cloudy. A 20% chance of showers. Highs in the lower 70s. East winds 5 to 10 mph.
Tonight... Mostly cloudy. Lows in the upper 50s. East winds around 5 mph.
Saturday... Cloudy. A slight chance of showers in the morning, then a chance of sprinkles in the afternoon. Highs in the lower 70s. East winds around 5 mph. Chance of rain 20%.
Saturday Night... Mostly cloudy with a 30% chance of showers. Lows in the mid 50s. East winds around 5 mph.
Sunday... Mostly cloudy. A chance of showers, mainly in the morning. Highs around 70. Southeast winds around 5 mph. Chance of rain 50%.
Sunday Night... Mostly cloudy. A slight chance of showers after midnight. Lows in the mid 50s. Chance of rain 20%.
Monday... Mostly cloudy with a 50% chance of showers. Highs in the lower 70s.
Monday Night... Mostly cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 50s. Chance of rain 60%.
Tuesday... Showers likely. Highs in the lower 70s. Chance of rain 70%.
Tuesday Night... A slight chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the lower 50s. Chance of rain 50%.
Wednesday... Partly sunny with a 50% chance of showers. Highs in the upper 60s.
Wednesday Night... Mostly cloudy with a 20% chance of showers. Lows in the mid 40s.
POP = Probability of Precipitation
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