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Fish Lake, IL Weather Forecast
Fish Lake, IL Weather Forecast Date: 727 PM CDT Thu Oct 08 2026
The area/counties/county of: Monroe County Il, Jefferson County Mo.or toggle through each period.
Tonight... Clear. Lows in the mid 50s. Southeast winds around 5 mph.
Friday... Sunny. Highs in the upper 80s. South winds 5 to 10 mph.
Friday Night... Mostly clear. Lows in the upper 50s. South winds around 5 mph.
Saturday... Mostly sunny in the morning, then mostly cloudy with a slight chance of rain in the afternoon. Highs in the lower 80s. Southeast winds 5 to 10 mph. Chance of rain 20%.
Saturday Night... Mostly cloudy with a 50% chance of rain. Lows in the upper 50s. East winds 5 to 10 mph.
Sunday... Mostly sunny. Highs around 80.
Sunday Night... Mostly clear. Lows in the upper 50s. Highs in the lower 90s.
Columbus Day... Mostly clear. Lows in the upper 50s. Highs in the lower 90s.
Monday Night... Clear. Lows in the mid 60s.
Tuesday... Sunny. Highs in the upper 80s.
Tuesday Night... Partly cloudy. A 20% chance of showers. Lows around 60. Highs in the lower 80s.
Wednesday... Partly cloudy. A 20% chance of showers. Lows around 60. Highs in the lower 80s.
Wednesday 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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