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.

Mostly Cloudy

27°F

-3°C

Humidity 59%
Wind Speed NW 3 mph
Barometer 30.44 in
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Last update 4 Feb 11:01 am CST
Extended Forecast for

Princeton IL

  • Today

    Today: Sunny, with a high near 28. Northwest wind around 5 mph.

    High: 28 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 15. Northwest wind around 5 mph becoming southwest after midnight.

    Low: 15 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A chance of snow with scattered flurries before noon, then scattered flurries between noon and 1pm. Cloudy, with a high near 36. Southwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 36 °F

    Chance Snow
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: A slight chance of freezing rain between midnight and 3am, then a slight chance of snow after 3am. Mostly cloudy, with a low around 28. West wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 28 °F

    Mostly Cloudy
    then Slight
    Chance Wintry
    Mix

  • Friday

    Friday: Partly sunny, with a high near 42.

    High: 42 °F

    Partly Sunny

  • Friday Night

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

    Low: 18 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 38.

    High: 38 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 28. Northwest wind around 5 mph.
Tonight
Increasing clouds, with a low around 15. Northwest wind around 5 mph becoming southwest after midnight.
Thursday
A chance of snow with scattered flurries before noon, then scattered flurries between noon and 1pm. Cloudy, with a high near 36. Southwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Thursday Night
A slight chance of freezing rain between midnight and 3am, then a slight chance of snow after 3am. Mostly cloudy, with a low around 28. West wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Friday
Partly sunny, with a high near 42.
Friday Night
Partly cloudy, with a low around 18.
Saturday
Mostly sunny, with a high near 34.
Saturday Night
Mostly cloudy, with a low around 26.
Sunday
Partly sunny, with a high near 38.
Sunday Night
Partly cloudy, with a low around 24.
Monday
Mostly sunny, with a high near 46.
Monday Night
Partly cloudy, with a low around 32.
Tuesday
Partly sunny, with a high near 51.
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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 4, 2026
Forecast Valid:
11am CST Feb 4, 2026-6pm CST Feb 10, 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