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.

Overcast

40°F

4°C

Humidity 46%
Wind Speed SW 7 mph
Barometer 29.55 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 24 Feb 6:35 pm CST
Extended Forecast for

Princeton IL

  • Tonight

    Tonight: A 20 percent chance of rain before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 23. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 23 °F

    Slight Chance
    Rain then
    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 38. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 38 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow, mainly after midnight. Partly cloudy, with a low around 22. Northwest wind around 5 mph becoming east after midnight.

    Low: 22 °F

    Chance Snow

  • Thursday

    Thursday: Mostly sunny, with a high near 45. East wind 5 to 10 mph becoming southwest in the afternoon.

    High: 45 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 28.

    Low: 28 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of snow after noon. Partly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny
    then Chance
    Snow

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 21.

    Low: 21 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of rain before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 23. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 38. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
A 30 percent chance of snow, mainly after midnight. Partly cloudy, with a low around 22. Northwest wind around 5 mph becoming east after midnight.
Thursday
Mostly sunny, with a high near 45. East wind 5 to 10 mph becoming southwest in the afternoon.
Thursday Night
Mostly clear, with a low around 28.
Friday
Sunny, with a high near 61.
Friday Night
Mostly clear, with a low around 30.
Saturday
A 30 percent chance of snow after noon. Partly sunny, with a high near 45.
Saturday Night
Partly cloudy, with a low around 21.
Sunday
A 30 percent chance of snow after noon. Partly sunny, with a high near 35.
Sunday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 21.
Monday
Mostly cloudy, with a high near 36.
Monday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 24.
Tuesday
A chance of rain and snow. Mostly cloudy, with a high near 40. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Princeton IL
 41.37°N 89.46°W (Elev. 709 ft)
Last Update:
5:51 pm CST Feb 24, 2026
Forecast Valid:
7pm CST Feb 24, 2026-6pm CST Mar 3, 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