Heat Across the Center of the Nation; Severe Thunderstorms Across the Great Lakes and Ohio Valley

Heat expands across the Desert Southwest, Plains, Mississippi Valley and Midwest into Monday. Fire weather concerns continue for portions of the Intermountain West. Active monsoonal moisture fuels thunderstorms over the Southwest with possible flash flooding. Tropical cyclone Fausto in the Pacific, should weaken as it approaches Hawaii; Dangerous surf, swells and rip currents are expected. Read More >

Current conditions at

Marshall County Airport (KC75)

Lat: 41.02°NLon: 89.39°WElev: 545ft.

Overcast

86°F

30°C

Humidity 74%
Wind Speed S 5 mph
Barometer 29.90 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 26 Jul 1:15 pm CDT
Extended Forecast for

5 Miles WSW Tiskilwa IL

Heat Advisory July 26, 01:38pm until July 27, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 26, 01:38pm until July 27, 10:00pm

    NOW until 10:00pm Mon

    Heat Advisory

  • This Afternoon

    High: 88 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 3am.  Mostly cloudy, with a low around 75. West wind 5 to 10 mph becoming south after midnight.

    Low: 75 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms after 3pm.  Mostly sunny, with a high near 90. Heat index values as high as 102. Southeast wind 10 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.  Chance of precipitation is 30%.

    High: 90 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 10pm.  Partly cloudy, with a low around 71. West wind around 10 mph becoming north after midnight. Winds could gust as high as 20 mph.

    Low: 71 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 64.

    Low: 64 °F

    Clear

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 88. Heat index values as high as 102. West wind around 5 mph.
Tonight
A 20 percent chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 75. West wind 5 to 10 mph becoming south after midnight.
Monday
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 90. Heat index values as high as 102. Southeast wind 10 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Monday Night
A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 71. West wind around 10 mph becoming north after midnight. Winds could gust as high as 20 mph.
Tuesday
Mostly sunny, with a high near 84.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Sunny, with a high near 83.
Wednesday Night
Clear, with a low around 64.
Thursday
Sunny, with a high near 84.
Thursday Night
Mostly cloudy, with a low around 67.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 82.
Friday Night
A 40 percent chance of showers. Partly cloudy, with a low around 66.
Saturday
A 30 percent chance of showers. Mostly sunny, with a high near 82.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Tiskilwa IL
 41.27°N 89.58°W (Elev. 896 ft)
1:27 pm CDT Jul 26, 2026
1pm CDT Jul 26, 2026-6pm CDT Aug 1, 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