Weather WorldFoster Lake, IL 7-Day Night Weather Forecast
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Foster Lake, IL Weather Forecast
Foster Lake, IL Weather Forecast Date: 637 AM CDT Fri Sep 25 2026
The area/counties/county of: Greene County Il, Jersey County Il.or toggle through each period.
Today... Mostly cloudy. Highs in the lower 70s. East winds around 5 mph.
Tonight... Mostly cloudy. Lows in the upper 50s. East winds around 5 mph.
Saturday... Mostly cloudy with a 20% chance of showers. Highs in the lower 70s. East winds around 5 mph.
Saturday Night... Mostly cloudy. A slight chance of showers after midnight. Lows in the upper 50s. East winds around 5 mph. Chance of rain 20%.
Sunday... Mostly cloudy in the morning, then becoming partly sunny. Highs in the mid 70s. East winds around 5 mph.
Sunday Night... Partly cloudy. Lows in the upper 50s.
Monday... Sunny. Highs in the upper 70s.
Monday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 50s.
Tuesday... Partly sunny. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs in the upper 70s. Chance of rain 40%.
Tuesday Night... Showers likely with a slight chance of thunderstorms. Lows in the mid 60s. Highs in the upper 70s. Chance of rain 60%.
Wednesday... Showers likely with a slight chance of thunderstorms. Lows in the mid 60s. Highs in the upper 70s. Chance of rain 60%.
Wednesday Night... Mostly cloudy. A 50% chance of showers. Lows in the lower 60s. Highs in the upper 70s.
POP = Probability of Precipitation
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