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

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fog

79°F

26°C

Humidity 100%
Wind Speed S 3 mph
Barometer 29.84 in
Dewpoint 79°F (26°C)
Visibility 0.25 mi
Heat Index84°F (29°C)
Last update 27 Jul 3:17 am CDT
Extended Forecast for

Dalzell IL

Extreme Heat Warning July 27, 03:35am until July 27, 10:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 27, 03:35am until July 27, 10:00pm

    NOW until 10:00pm Mon

    Extreme Heat Warning

  • Overnight

    Low: 75 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms after 3pm.  Partly sunny, with a high near 90. Heat index values as high as 103. South wind 5 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 40%.

    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: Sunny, with a high near 84. North wind around 10 mph.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 63.

    Low: 63 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 75. South wind around 5 mph.
Monday
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 90. Heat index values as high as 103. South wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
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
Sunny, with a high near 84. North wind around 10 mph.
Tuesday Night
Mostly clear, with a low around 63.
Wednesday
Sunny, with a high near 84.
Wednesday Night
Clear, with a low around 63.
Thursday
Sunny, with a high near 85.
Thursday Night
Mostly cloudy, with a low around 67.
Friday
A 50 percent chance of showers after 1pm. Mostly cloudy, with a high near 83.
Friday Night
A 50 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.
Saturday Night
Mostly clear, with a low around 65.
Sunday
Sunny, with a high near 84.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Dalzell IL
 41.37°N 89.17°W (Elev. 650 ft)
1:32 am CDT Jul 27, 2026
3am CDT Jul 27, 2026-6pm CDT Aug 2, 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