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Boulder, IL Weather Forecast
Boulder, IL Weather Forecast Date: 604 PM CDT Mon Oct 26 2026
The area/counties/county of: Clinton County Il, including the cities of: Centralia and Salem.or toggle through each period.
Tonight... Mostly clear this evening, then becoming partly cloudy. Lows in the upper 40s. Light and variable winds.
Tuesday... Partly sunny in the morning, then becoming mostly cloudy. Highs in the mid 70s. South winds around 5 mph.
Tuesday Night... Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 50s. South winds around 5 mph in the evening, becoming light and variable.
Wednesday... Sunny. Highs in the upper 70s. South winds 5 to 10 mph.
Wednesday Night... Clear. Lows in the lower 50s. South winds around 5 mph.
Thursday... Sunny. Highs in the lower 80s.
Thursday Night... Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 50s.
Friday... Partly sunny. Highs in the lower 80s.
Friday Night... Mostly cloudy. A slight chance of showers after midnight. Lows in the mid 50s. Chance of rain 20%.
Saturday... Mostly cloudy. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs in the mid 70s. Chance of rain 40%.
Saturday Night... Mostly cloudy with a 50% chance of showers. Lows in the upper 50s.
Sunday... Mostly cloudy with a 20% chance of showers. Highs in the mid 70s. Lows in the upper 50s.
Sunday Night... Mostly cloudy with a 20% chance of showers. Highs in the mid 70s. Lows in the upper 50s.
POP = Probability of Precipitation
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