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.

Partly Cloudy

39°F

4°C

Humidity 43%
Wind Speed S 9 mph
Barometer 29.92 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 26 Feb 11:30 am CST
Extended Forecast for

Princeton IL

  • Today

    Today: Partly sunny, with a high near 46. Southwest wind 5 to 10 mph.

    High: 46 °F

    Partly Sunny

  • Tonight

    Tonight: Clear, with a low around 30. Southwest wind around 5 mph.

    Low: 30 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 65. Breezy, with a southwest wind 5 to 15 mph increasing to 15 to 25 mph in the afternoon. Winds could gust as high as 40 mph.

    High: 65 °F

    Sunny and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 29. West wind 5 to 15 mph becoming north after midnight. Winds could gust as high as 25 mph.

    Low: 29 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of snow after noon. Mostly cloudy, with a high near 41.

    High: 41 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of snow after noon. Mostly cloudy, with a high near 33.

    High: 33 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday Night

    Sunday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 19.

    Low: 19 °F

    Chance Snow

  • Monday

    Monday: Mostly cloudy, with a high near 36.

    High: 36 °F

    Mostly Cloudy

Detailed Forecast

Today
Partly sunny, with a high near 46. Southwest wind 5 to 10 mph.
Tonight
Clear, with a low around 30. Southwest wind around 5 mph.
Friday
Sunny, with a high near 65. Breezy, with a southwest wind 5 to 15 mph increasing to 15 to 25 mph in the afternoon. Winds could gust as high as 40 mph.
Friday Night
Mostly clear, with a low around 29. West wind 5 to 15 mph becoming north after midnight. Winds could gust as high as 25 mph.
Saturday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 41.
Saturday Night
Partly cloudy, with a low around 18.
Sunday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 33.
Sunday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 19.
Monday
Mostly cloudy, with a high near 36.
Monday Night
A chance of snow and freezing rain after midnight. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.
Tuesday
A chance of rain or freezing rain. Cloudy, with a high near 42. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 25.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Princeton IL
 41.37°N 89.46°W (Elev. 709 ft)
Last Update:
10:57 am CST Feb 26, 2026
Forecast Valid:
11am CST Feb 26, 2026-6pm CST Mar 4, 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