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

84°F

29°C

Humidity 48%
Wind Speed N 3 mph
Barometer 30.10 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 7 Jul 2:32 pm CDT
Extended Forecast for

Princeton IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 85. Calm wind.

    High: 85 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 64. Calm wind.

    Low: 64 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 87 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 68. South wind around 5 mph.

    Low: 68 °F

    Partly Cloudy

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 86. Chance of precipitation is 60%.

    High: 86 °F

    Partly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 67 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 83. Chance of precipitation is 40%.

    High: 83 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 65.

    Low: 65 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers after 1pm. Partly sunny, with a high near 84.

    High: 84 °F

    Partly Sunny
    then Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 85. Calm wind.
Tonight
Clear, with a low around 64. Calm wind.
Wednesday
Sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 68. South wind around 5 mph.
Thursday
Showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 86. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 83. Chance of precipitation is 40%.
Friday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 65.
Saturday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 84.
Saturday Night
Partly cloudy, with a low around 65.
Sunday
Sunny, with a high near 86.
Sunday Night
Clear, with a low around 66.
Monday
Sunny, with a high near 88.
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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:
1:46 pm CDT Jul 7, 2026
Forecast Valid:
3pm CDT Jul 7, 2026-6pm CDT Jul 13, 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