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

Hazardous Weather Conditions

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fair

59°F

15°C

Humidity 97%
Wind Speed SW 9 mph
Barometer 29.77 in
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 10 Mar 4:30 am CDT
Extended Forecast for

Princeton IL

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Patchy fog before 10am. Otherwise, partly sunny, with a high near 69. Southwest wind 5 to 10 mph becoming southeast in the afternoon.

    High: 69 °F

    Patchy Fog
    then Chance
    T-storms

  • Tonight

    Tonight: Showers and possibly a thunderstorm. Low around 40. East wind 5 to 10 mph becoming west after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 40 °F

    T-storms then
    Showers

  • Wednesday

    Wednesday: Rain before 4pm, then a chance of rain and snow. Some thunder is also possible. Temperature falling to around 40 by 8am. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 43 °F⇓

    Showers then
    Rain/Snow and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming clear, with a low around 26. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 26 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of rain after 1am. Mostly cloudy, with a low around 40. Breezy.

    Low: 40 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Rain

  • Friday

    Friday: Partly sunny, with a high near 51. Breezy.

    High: 51 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 54.

    High: 54 °F

    Mostly Cloudy

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Patchy fog before 10am. Otherwise, partly sunny, with a high near 69. Southwest wind 5 to 10 mph becoming southeast in the afternoon.
Tonight
Showers and possibly a thunderstorm. Low around 40. East wind 5 to 10 mph becoming west after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Rain before 4pm, then a chance of rain and snow. Some thunder is also possible. Temperature falling to around 40 by 8am. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday Night
Mostly cloudy, then gradually becoming clear, with a low around 26. Northwest wind 5 to 15 mph, with gusts as high as 25 mph.
Thursday
Mostly sunny, with a high near 49.
Thursday Night
A 40 percent chance of rain after 1am. Mostly cloudy, with a low around 40. Breezy.
Friday
Partly sunny, with a high near 51. Breezy.
Friday Night
Mostly cloudy, with a low around 31.
Saturday
Mostly cloudy, with a high near 54.
Saturday Night
A 40 percent chance of rain after 1am. Cloudy, with a low around 37.
Sunday
Rain and snow likely. Cloudy, with a high near 47. Breezy. Chance of precipitation is 70%.
Sunday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 17. Blustery.
Monday
Partly sunny, with a high near 29.
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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:
4:36 am CDT Mar 10, 2026
Forecast Valid:
4am CDT Mar 10, 2026-6pm CDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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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