Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Hazardous Weather Conditions

Current conditions at

Marshall County Airport (KC75)

Lat: 41.02°NLon: 89.39°WElev: 545ft.

Partly Cloudy

80°F

27°C

Humidity 61%
Wind Speed SW 6 mph
Barometer 30.03 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 21 Aug 2:15 pm CDT
Extended Forecast for

Tiskilwa IL

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly after 3pm.  Mostly sunny, with a high near 82. Southwest wind around 10 mph.

    High: 82 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 10pm.  Partly cloudy, with a low around 63. Southwest wind around 5 mph becoming northwest in the evening.  Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 63 °F

    Showers
    Likely then
    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 81. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 58. Northwest wind 5 to 10 mph.

    Low: 58 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 80.

    High: 80 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 82. Southwest wind around 10 mph.
Tonight
Showers and thunderstorms likely, mainly before 10pm. Partly cloudy, with a low around 63. Southwest wind around 5 mph becoming northwest in the evening. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Sunny, with a high near 81. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Clear, with a low around 58. Northwest wind 5 to 10 mph.
Sunday
Sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 57.
Monday
Mostly sunny, with a high near 78.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Partly sunny, with a high near 80.
Tuesday Night
Mostly cloudy, with a low around 65.
Wednesday
Mostly sunny, with a high near 83.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
Tiskilwa IL
 41.29°N 89.5°W (Elev. 535 ft)
2:10 pm CDT Aug 21, 2026
2pm CDT Aug 21, 2026-6pm CDT Aug 27, 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