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Boston Lake, IL 7-Day Night Weather Forecast
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Boston Lake, IL Weather Forecast
Boston Lake, IL Weather Forecast Date: 407 AM CDT Fri Aug 14 2026
The area/counties/county of: Marion County Il, including the cities of: Centralia and Salem.or toggle through each period.
Today... Mostly sunny. A slight chance of showers and thunderstorms this morning. Highs in the lower 90s. South winds around 5 mph. Chance of rain 20%. Heat index values up to 111 this afternoon.
Tonight... Mostly clear. Humid with lows in the mid 70s. Southeast winds around 5 mph. Heat index values up to 108 early in the evening.
Saturday... Sunny with highs in the mid 90s. Southwest winds around 5 mph. Heat index values up to 111 in the afternoon.
Saturday Night... Mostly clear. Humid with lows in the mid 70s. Southwest winds around 5 mph. Heat index values up to 108 early in the evening.
Sunday... Mostly sunny. Humid with highs in the mid 90s. West winds around 5 mph. Heat index values up to 109.
Sunday Night... Partly cloudy. A chance of showers and thunderstorms, mainly in the evening. Lows in the lower 70s. Chance of rain 40%. Heat index values up to 105 early in the evening.
Monday... Partly cloudy. Highs in the mid 80s. Lows in the mid 60s.
Monday Night... Partly cloudy. Highs in the mid 80s. Lows in the mid 60s.
Tuesday... Mostly clear. Highs in the mid 80s. Lows in the upper 60s.
Tuesday Night... Mostly clear. Highs in the mid 80s. Lows in the upper 60s.
Wednesday... Mostly sunny. Highs in the lower 90s. Heat index values up to 100 in the afternoon.
Wednesday Night... Partly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the lower 70s. Chance of rain 30%.
POP = Probability of Precipitation
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