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Hazardous Weather Conditions

Current conditions at

Marshall County Airport (KC75)

Lat: 41.02°NLon: 89.39°WElev: 545ft.

Fair

75°F

24°C

Humidity 81%
Wind Speed Calm
Barometer 29.90 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 4 Sep 2:55 am CDT
Extended Forecast for

Spring Valley IL

Extreme Heat Warning September 4, 03:14am until September 4, 07:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 4, 03:14am until September 4, 07:00pm

    NOW until 7:00pm Fri

    Extreme Heat Warning

  • Overnight

    Low: 75 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 93. Heat index values as high as 101. West wind around 5 mph.

    High: 93 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 73. Southwest wind around 5 mph becoming calm.

    Low: 73 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 92. Heat index values as high as 100. Calm wind becoming north around 5 mph in the afternoon.

    High: 92 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 75. Southwest wind around 5 mph.
Friday
Sunny, with a high near 93. Heat index values as high as 101. West wind around 5 mph.
Friday Night
A 20 percent chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 73. Southwest wind around 5 mph becoming calm.
Saturday
Sunny, with a high near 92. Heat index values as high as 100. Calm wind becoming north around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 68.
Sunday
Mostly sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 64.
Labor Day
Mostly sunny, with a high near 84.
Monday Night
Partly cloudy, with a low around 65.
Tuesday
Mostly sunny, with a high near 90.
Tuesday Night
Partly cloudy, with a low around 74.
Wednesday
Mostly sunny, with a high near 92.
Wednesday Night
A 40 percent chance of showers. Partly cloudy, with a low around 70.
Thursday
Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Spring Valley IL
 41.32°N 89.2°W (Elev. 538 ft)
Last Update:
2:36 am CDT Sep 4, 2026
Forecast Valid:
3am CDT Sep 4, 2026-6pm CDT Sep 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