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

82°F

28°C

Humidity 85%
Wind Speed Calm
Barometer 30.07 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 15 Aug 8:15 pm CDT
Extended Forecast for

Speer IL

Severe T-storm Watch until August 15, 11:00pm
Heat Advisory August 16, 12:00pm until August 17, 08:00pm
Click here for hazard details and duration
...
Heat Advisory
  •  
    Severe T-storm Watch until August 15, 11:00pm

    NOW until 11:00pm Fri

    Severe T-storm Watch

  • Tonight

    Low: 74 °F

    Severe
    Thunderstorms

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 95. Heat index values as high as 105. South southwest wind 5 to 7 mph.

    High: 95 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74. West southwest wind around 6 mph becoming calm in the evening.

    Low: 74 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 96. Heat index values as high as 103. Calm wind becoming south southwest around 6 mph in the morning.

    High: 96 °F

    Hot

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 73. South southeast wind 3 to 5 mph.

    Low: 73 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny and hot, with a high near 95. Southwest wind 5 to 8 mph.

    High: 95 °F

    Hot

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southwest wind 3 to 5 mph.

    Low: 73 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 90. Chance of precipitation is 30%.

    High: 90 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Tonight
A 50 percent chance of showers and thunderstorms, mainly before 1am. Some of the storms could be severe. Partly cloudy, with a low around 74. South wind 5 to 7 mph.
Saturday
Mostly sunny and hot, with a high near 95. Heat index values as high as 105. South southwest wind 5 to 7 mph.
Saturday Night
Mostly clear, with a low around 74. West southwest wind around 6 mph becoming calm in the evening.
Sunday
Sunny and hot, with a high near 96. Heat index values as high as 103. Calm wind becoming south southwest around 6 mph in the morning.
Sunday Night
Partly cloudy, with a low around 73. South southeast wind 3 to 5 mph.
Monday
Mostly sunny and hot, with a high near 95. Southwest wind 5 to 8 mph.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southwest wind 3 to 5 mph.
Tuesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 90. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 69.
Wednesday
Mostly sunny, with a high near 83.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 63.
Friday
Sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Speer IL
 41.01°N 89.69°W (Elev. 666 ft)
Last Update:
7:40 pm CDT Aug 15, 2025
Forecast Valid:
8pm CDT Aug 15, 2025-6pm CDT Aug 22, 2025
 
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