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Centralia, IL Weather Forecast
Centralia, IL Weather Forecast Date: 543 PM CDT Mon Sep 14 2026
The area/counties/county of: Clinton County Il, including the cities of: Centralia and Salem.or toggle through each period.
Tonight... Clear. Lows in the upper 60s. Southeast winds 5 to 10 mph.
Tuesday... Sunny. A slight chance of showers and thunderstorms in the afternoon. Warmer with highs in the upper 90s. South winds 5 to 10 mph. Chance of rain 20%. Heat index values up to 107.
Tuesday Night... Partly cloudy with scattered showers and thunderstorms. Humid with lows in the lower 70s. South winds around 5 mph in the evening, becoming light and variable. Chance of rain 50%. Heat index values up to 103 early in the evening.
Wednesday... Mostly sunny. A slight chance of showers and thunderstorms in the morning. Hot with highs in the mid 90s. Southeast winds around 5 mph, becoming southwest in the afternoon. Chance of rain 20%. Heat index values up to 105.
Wednesday Night... Mostly clear. Lows in the lower 70s. South winds around 5 mph in the evening, becoming light and variable. Heat index values up to 101 early in the evening.
Thursday... Mostly clear. Hot. Highs in the mid 90s. Lows in the lower 70s. Heat index values up to 105.
Friday... Mostly clear. Hot. Highs in the mid 90s. Lows in the lower 70s. Heat index values up to 105.
Saturday... Mostly clear. Hot. Highs in the mid 90s. Lows in the lower 70s. Heat index values up to 105.
Saturday Night... Partly cloudy in the evening, then clearing. Lows around 70.
Sunday... Partly cloudy. A slight chance of showers and thunderstorms. Highs around 90. Lows in the mid 60s. Chance of rain 20%.
Sunday Night... Partly cloudy. A slight chance of showers and thunderstorms. Highs around 90. Lows in the mid 60s. Chance of rain 20%.
POP = Probability of Precipitation
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