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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: 122 AM CST Fri Nov 13 2026
The area/counties/county of: Menard, including the city of Petersburg.or toggle through each period.
Rest of Tonight... Partly cloudy. Near steady temperature in the lower 30s. Northwest winds 5 to 10 mph.
Friday... Mostly sunny. Highs in the mid 40s. North winds 10 to 15 mph with gusts up to 25 mph.
Friday Night... Mostly clear. Lows in the mid 20s. Northwest winds around 5 mph.
Saturday... Sunny. Highs in the upper 40s. North winds around 5 mph.
Saturday Night... Clear. Lows in the lower 20s. Light and variable winds.
Sunday... Sunny. Highs around 50.
Sunday Night... Clear. Lows in the upper 20s. Highs in the lower 50s.
Monday... Clear. Lows in the upper 20s. Highs in the lower 50s.
Tuesday... Clear. Lows in the upper 20s. Highs in the lower 50s.
Wednesday... Sunny. Highs in the upper 50s.
Wednesday Night... Partly cloudy. Not as cool with lows in the upper 30s.
POP = Probability of Precipitation
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