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Peru, IL 7-Day Night Weather Forecast
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Peru, IL Weather Forecast
Peru, IL Weather Forecast Date: 406 PM CDT Sat Sep 05 2026
The area/counties/county of: La Salle, including the cities of: Ottawa, Streator, La Salle, Mendota, and Marseilles.or toggle through each period.
Late This Afternoon... Partly cloudy. Northeast winds around 10 mph. Heat index values up to 102.
Tonight... Partly cloudy in the evening, then becoming mostly cloudy. Humid. Lows in the mid 60s. Northeast winds 5 to 10 mph.
Sunday... Mostly sunny in the morning, then becoming partly cloudy. Highs in the lower 80s. East winds 5 to 10 mph.
Sunday Night... Partly cloudy. Lows around 60. East winds 5 to 10 mph.
Labor Day... Mostly sunny. Highs in the lower 80s. East winds 5 to 10 mph.
Monday Night... Mostly clear. Lows in the lower 60s. Southeast winds 5 to 10 mph.
Tuesday... Partly cloudy. Highs in the upper 80s.
Tuesday Night... Partly cloudy. Lows in the lower 70s.
Wednesday... Mostly cloudy in the morning, then becoming partly cloudy. Highs in the upper 80s.
Wednesday Night... Partly cloudy. Lows in the mid 60s.
Thursday... Mostly cloudy in the morning, then becoming partly cloudy. Highs in the lower 80s.
Thursday Night... Partly cloudy in the evening, then clearing. Lows around 60.
Friday... Mostly sunny in the morning, then becoming partly cloudy. Highs in the lower 80s.
Friday Night... Partly cloudy in the evening, then becoming mostly clear. Lows in the lower 60s.
POP = Probability of Precipitation
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