National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fair

N/A

Humidity NA
Wind Speed NE 8 mph
Barometer 30.00 in
Dewpoint N/A
Visibility 10.00 mi
Last update 29 Jul 5:30 pm CDT
Extended Forecast for

Peru IL

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, mostly clear, with a low around 59. Northeast wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Clear then
    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 8am. Otherwise, sunny, with a high near 85. Calm wind becoming south around 5 mph.

    High: 85 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 64. Calm wind becoming south southeast around 5 mph.

    Low: 64 °F

    Mostly Cloudy

  • Friday

    Friday: Showers likely, then showers and possibly a thunderstorm after 1pm. High near 77. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    High: 77 °F

    Showers
    Likely then
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 64. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    Low: 64 °F

    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 4pm, then a chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 78. Chance of precipitation is 70%.

    High: 78 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, mostly clear, with a low around 59. Northeast wind around 5 mph becoming calm in the evening.
Thursday
Patchy fog before 8am. Otherwise, sunny, with a high near 85. Calm wind becoming south around 5 mph.
Thursday Night
Mostly cloudy, with a low around 64. Calm wind becoming south southeast around 5 mph.
Friday
Showers likely, then showers and possibly a thunderstorm after 1pm. High near 77. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Friday Night
Showers and possibly a thunderstorm. Low around 64. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Saturday
Showers likely and possibly a thunderstorm before 4pm, then a chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 78. Chance of precipitation is 70%.
Saturday Night
A 30 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 62.
Sunday
Mostly sunny, with a high near 81.
Sunday Night
Mostly clear, with a low around 61.
Monday
Sunny, with a high near 82.
Monday Night
Mostly clear, with a low around 64.
Tuesday
Sunny, with a high near 85.
Tuesday Night
Mostly clear, with a low around 66.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Peru IL
 41.34°N 89.11°W
Last Update:
2:26 pm CDT Jul 29, 2026
Forecast Valid:
6pm CDT Jul 29, 2026-6pm CDT Aug 5, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation