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

35°F

2°C

Humidity 70%
Wind Speed N 7 mph
Barometer 30.12 in
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 14 Mar 1:15 am CDT
Extended Forecast for

Peru IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 31. North northeast wind around 5 mph, with gusts as high as 10 mph.

    Low: 31 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of snow showers between 9am and noon. Mostly cloudy, with a high near 46. East southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 46 °F

    Slight Chance
    Snow Showers
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: A 20 percent chance of showers after 4am. Mostly cloudy, with a low around 41. East southeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 41 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers, then showers and possibly a thunderstorm after 10am. High near 63. Breezy, with a south wind 15 to 25 mph, with gusts as high as 45 mph. Chance of precipitation is 90%.

    High: 63 °F

    Breezy.
    Showers
    Likely then
    Showers

  • Sunday Night

    Sunday Night: Rain showers before 10pm, then snow showers, possibly mixed with rain between 10pm and 1am, then snow showers after 1am. Patchy blowing snow after midnight. Low around 19. Windy, with a west southwest wind 25 to 30 mph becoming north northwest after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 100%.

    Low: 19 °F

    Rain/Snow and
    Patchy
    Blowing Snow

  • Monday

    Monday: Snow showers likely, mainly before 1pm. Widespread blowing snow, mainly before noon. Cloudy, with a high near 23. Windy. Chance of precipitation is 60%.

    High: 23 °F

    Snow Showers
    Likely and
    Blowing Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 7. Blustery.

    Low: 7 °F

    Mostly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 26.

    High: 26 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow showers. Mostly cloudy, with a low around 20.

    Low: 20 °F

    Chance Snow
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 31. North northeast wind around 5 mph, with gusts as high as 10 mph.
Saturday
A slight chance of snow showers between 9am and noon. Mostly cloudy, with a high near 46. East southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Saturday Night
A 20 percent chance of showers after 4am. Mostly cloudy, with a low around 41. East southeast wind around 15 mph, with gusts as high as 25 mph.
Sunday
A chance of showers, then showers and possibly a thunderstorm after 10am. High near 63. Breezy, with a south wind 15 to 25 mph, with gusts as high as 45 mph. Chance of precipitation is 90%.
Sunday Night
Rain showers before 10pm, then snow showers, possibly mixed with rain between 10pm and 1am, then snow showers after 1am. Patchy blowing snow after midnight. Low around 19. Windy, with a west southwest wind 25 to 30 mph becoming north northwest after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 100%.
Monday
Snow showers likely, mainly before 1pm. Widespread blowing snow, mainly before noon. Cloudy, with a high near 23. Windy. Chance of precipitation is 60%.
Monday Night
Mostly cloudy, with a low around 7. Blustery.
Tuesday
Mostly sunny, with a high near 26.
Tuesday Night
A chance of snow showers. Mostly cloudy, with a low around 20.
Wednesday
Mostly sunny, with a high near 48.
Wednesday Night
Mostly clear, with a low around 32.
Thursday
Mostly sunny, with a high near 57.
Thursday Night
Partly cloudy, with a low around 36.
Friday
Mostly sunny, with a high near 56.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Peru IL
 41.32°N 89.12°W
Last Update:
12:51 am CDT Mar 14, 2026
Forecast Valid:
1am CDT Mar 14, 2026-6pm CDT Mar 20, 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