Excessive Rainfall Potential for the Southeast; Heat Expands for Center of the Nation; Critical Fire Weather for Pacific Northwest

Flash flooding threatens areas from the Tennessee Valley to the Carolinas as storms repeat along a stalled front. Monsoonal storms may trigger flooding in the Southwest. Dangerous heat expands across the Desert Southwest, Plains, mid-Mississippi Valley and Southern Tier. Critical fire weather for interior Pacific Northwest. Cooler, drier air brings brief relief to the Great Lakes and Northeast. Read More >

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Overcast

75°F

24°C

Humidity 78%
Wind Speed SE 5 mph
Barometer 29.99 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 25 Jul 1:38 pm CDT
Extended Forecast for

3 Miles S Princeton IL

Extreme Heat Watch July 26, 09:00pm until July 27, 10:00pm
Extreme Heat Warning July 26, 11:00am until July 26, 09:00pm
Click here for hazard details and duration
Extreme Heat Watch
Extreme Heat Warning
  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 83. South wind around 5 mph.

    High: 83 °F

    Mostly Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 70. South wind around 5 mph becoming calm  in the evening.

    Low: 70 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 10am.  Partly sunny, with a high near 92. Heat index values as high as 103. Light south wind increasing to 5 to 10 mph in the morning.

    High: 92 °F

    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 10pm.  Partly cloudy, with a low around 75. Southwest wind 5 to 10 mph.

    Low: 75 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 83. South wind around 5 mph.
Tonight
Partly cloudy, with a low around 70. South wind around 5 mph becoming calm in the evening.
Sunday
A 20 percent chance of showers and thunderstorms after 10am. Partly sunny, with a high near 92. Heat index values as high as 103. Light south wind increasing to 5 to 10 mph in the morning.
Sunday Night
A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 75. Southwest wind 5 to 10 mph.
Monday
Mostly sunny, with a high near 93.
Monday Night
Mostly clear, with a low around 72.
Tuesday
Mostly sunny, with a high near 88.
Tuesday Night
Mostly clear, with a low around 64.
Wednesday
Sunny, with a high near 85.
Wednesday Night
Mostly clear, with a low around 64.
Thursday
Mostly sunny, with a high near 86.
Thursday Night
Partly cloudy, with a low around 66.
Friday
Mostly sunny, with a high near 86.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Princeton IL
 41.33°N 89.46°W (Elev. 682 ft)
2:01 pm CDT Jul 25, 2026
2pm CDT Jul 25, 2026-6pm CDT Jul 31, 2026
 
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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