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City of Petersburg, ILPetersburg, IL 7-Day Night Weather Forecast
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Petersburg, IL Weather Forecast
Petersburg, IL Weather Forecast Date: 107 PM CST Thu Nov 12 2026
The area/counties/county of: Menard, including the city of Petersburg.or toggle through each period.
This Afternoon... Partly sunny. Much cooler with highs in the mid 40s. North winds 15 to 20 mph with gusts up to 30 mph.
Tonight... Mostly clear. Lows in the lower 30s. Northwest winds 10 to 15 mph with gusts up to 25 mph.
Friday... Mostly sunny. Highs in the mid 40s. North winds 10 to 15 mph.
Friday Night... Clear. Lows in the mid 20s. Northwest winds around 5 mph.
Saturday... Sunny. Highs in the upper 40s. Northwest winds around 5 mph.
Saturday Night... Clear. Lows in the mid 20s.
Sunday... Sunny. Highs around 50.
Sunday Night... Clear. Lows in the upper 20s. Highs in the mid 50s.
Monday... Clear. Lows in the upper 20s. Highs in the mid 50s.
Tuesday... Clear. Lows in the upper 20s. Highs in the mid 50s.
POP = Probability of Precipitation
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