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Peru, IL Weather Forecast
Peru, IL Weather Forecast Date: 246 AM CDT Tue Oct 27 2026
The area/counties/county of: La Salle, including the cities of: Ottawa, Streator, La Salle, Mendota, and Marseilles.or toggle through each period.
Early This Morning... Mostly cloudy. Patchy fog. Temperatures in the upper 40s. East winds around 5 mph.
Today... Mostly cloudy. Patchy fog early in the morning. Highs in the lower 70s. Southeast winds 5 to 10 mph.
Tonight... Mostly cloudy. Lows in the lower 50s. South winds around 5 mph.
Wednesday... Partly cloudy. Highs in the mid 70s. South winds 5 to 10 mph.
Wednesday Night... Mostly clear in the evening, then becoming partly cloudy. A slight chance of showers after midnight. Lows in the mid 50s. South winds 5 to 10 mph. Chance of precipitation 20%.
Thursday... Partly cloudy in the morning, then becoming mostly cloudy. A chance of showers, mainly in the morning. Highs in the mid 70s. West winds 5 to 10 mph. Chance of precipitation 30%.
Thursday Night... Partly cloudy. Lows in the lower 50s.
Friday... Mostly cloudy. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs in the mid 70s. Chance of precipitation 40%.
Friday Night... Cloudy. A chance of showers after midnight. Lows in the mid 50s. Chance of precipitation 40%.
Saturday... Mostly cloudy. A chance of showers in the morning. Highs in the lower 70s. Chance of precipitation 40%.
Saturday Night... Mostly cloudy with a 50% chance of showers. Lows in the mid 50s.
Sunday... Mostly cloudy with a 40% chance of showers. Highs in the lower 70s.
Sunday Night... Mostly cloudy. A chance of showers after midnight. Lows in the mid 50s. Chance of precipitation 30%.
POP = Probability of Precipitation
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