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St. Peter, IL Weather Forecast
St. Peter, IL Weather Forecast Date: 637 PM CST Sat Nov 14 2026
The area/counties/county of: Montgomery County Il, including the cities of: Litchfield and Vandalia.or toggle through each period.
Tonight... Clear. Lows in the mid 20s. North winds around 5 mph this evening, becoming light and variable.
Sunday... Sunny. Highs in the lower 50s. Light and variable winds.
Sunday Night... Mostly clear. Lows in the mid 20s. Light and variable winds.
Monday... Sunny. Highs in the mid 50s. Light and variable winds.
Monday Night... Clear. Lows in the upper 20s. Light and variable winds.
Tuesday... Sunny. Highs in the upper 50s.
Tuesday Night... Clear. Lows in the lower 30s.
Wednesday... Sunny. Highs in the lower 60s.
Wednesday Night... Partly cloudy. Lows in the lower 40s. Highs in the mid 60s.
Thursday... Partly cloudy. Lows in the lower 40s. Highs in the mid 60s.
Friday... Partly sunny. Highs in the upper 60s.
Friday Night... Partly cloudy. Lows in the upper 40s.
POP = Probability of Precipitation
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