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

Hazardous Weather Conditions

Current conditions at

Marshall County Airport (KC75)

Lat: 41.02°NLon: 89.39°WElev: 545ft.

Fair

94°F

34°C

Humidity 43%
Wind Speed SW 6 mph
Barometer 29.96 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 1 Sep 2:35 pm CDT
Extended Forecast for

Granville IL

Heat Advisory until September 3, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until September 3, 07:00pm

    NOW until 7:00pm Thu

    Heat Advisory

  • This Afternoon

    High: 93 °F

    Mostly Sunny

  • Tonight

    Tonight: Clear, with a low around 73. South wind around 5 mph.

    Low: 73 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 92. Heat index values as high as 101. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 92 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 75. Southwest wind 5 to 10 mph.

    Low: 75 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Mostly sunny, with a high near 90. Chance of precipitation is 40%.

    High: 90 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy
    then Chance
    T-storms

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 93. Heat index values as high as 101. Southwest wind around 10 mph.
Tonight
Clear, with a low around 73. South wind around 5 mph.
Wednesday
Sunny, with a high near 92. Heat index values as high as 101. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 75. Southwest wind 5 to 10 mph.
Thursday
Sunny, with a high near 92.
Thursday Night
Mostly clear, with a low around 75.
Friday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Mostly sunny, with a high near 90. Chance of precipitation is 40%.
Friday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72.
Saturday
Mostly sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Mostly sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 67.
Labor Day
Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Granville IL
 41.26°N 89.24°W (Elev. 699 ft)
Last Update:
2:51 pm CDT Sep 1, 2026
Forecast Valid:
2pm CDT Sep 1, 2026-6pm CDT Sep 7, 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