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Peru, Illinois Weather Forecast
Peru, Illinois Weather
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Weather Forecast for Peru, Illinois : LaSalle County
Issued: 10:01 pm CST Jan 20, 2026 Latitude: 41.3275349 Longitude: -89.1289728 View on Google Maps

MouseOver for Detail Forecast
Tonight Wednesday Thursday Friday Saturday Sunday Monday Tuesday
60% chance of snow on Tonight 30% chance of snow on Wednesday Mostly Sunny on Thursday Mostly Sunny on Friday Mostly Cloudy on Saturday Partly Sunny on Sunday Mostly Sunny on Monday Mostly Sunny on Tuesday
Low: 26°F High: 31°F High: 24°F High: -1°F High: 8°F High: 15°F High: 18°F High: 28°F
Low: 15°F Low: -6°F Low: -7°F Low: 2°F Low: 1°F Low: 7°F  
Snow Snow Mostly Sunny Mostly Sunny Mostly Cloudy Partly Sunny Mostly Sunny Mostly Sunny
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60% chance of snow Tonight Tonight... Snow likely, mainly between 3am and 4am. Cloudy, with a steady temperature around 26. South wind 10 to 15 mph becoming west southwest after midnight. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.

30% chance of snow Wednesday Wednesday... A chance of snow or flurries before 9am, then scattered flurries with isolated snow showers after 5pm. Cloudy, then gradually becoming mostly sunny, with a high near 31. West southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

50% chance of snow Wednesday Night Wednesday Night... Scattered snow showers, mainly before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 15. Wind chill values as low as 1. Breezy, with a west northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 50%.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 24. Wind chill values as low as 1. West wind 10 to 15 mph, with gusts as high as 20 mph.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around -6. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.

Mostly Sunny on Friday Friday... Mostly sunny and cold, with a high near -1.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around -7.

Mostly Cloudy on Saturday Saturday... Mostly cloudy and cold, with a high near 8.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 2.

Partly Sunny on Sunday Sunday... Partly sunny, with a high near 15.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 1.

Mostly Sunny on Monday Monday... Mostly sunny, with a high near 18.

Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 7.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 28.

Sun Almanac for Peru, Illinois
Sunrise: 07:17 AM
Sunset: 4:58 PM
Civil Sunrise:06:47 AM
Civil Sunset: 5:28 PM
Nautical Sunrise: 06:13 AM
Nautical Sunset: 6:02 PM
Astro Sunrise: 05:41 AM
Astro Sunset: 6:35 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.