Extreme Heat and Severe Thunderstorms Today

Extreme heat continues today from the central Plains to the lower Mississippi River Valley, over southeast Montana, and from southern California into the Southwest Deserts. Extreme Heat Warnings remain in effect. Severe thunderstorms capable of strong to severe wind gusts and large hail are possible across the Great Lakes into the Ohio Valley today into tonight. Read More >

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fog/Mist

79°F

26°C

Humidity 100%
Wind Speed S 7 mph
Barometer 29.85 in
Dewpoint 79°F (26°C)
Visibility 2.00 mi
Heat Index84°F (29°C)
Last update 27 Jul 7:59 am CDT
Extended Forecast for

3 Miles NNW Marseilles IL

Extreme Heat Warning July 27, 10:27am until July 27, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 27, 10:27am until July 27, 09:00pm

    NOW until 9:00pm Mon

    Extreme Heat Warning

  • Today

    High: 94 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 11pm.  Partly cloudy, with a low around 71. West southwest wind 5 to 15 mph becoming north northeast 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 81. North northeast wind 10 to 15 mph.

    High: 81 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 61. North northeast wind 5 to 10 mph.

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 82. North northeast wind around 5 mph, with gusts as high as 15 mph.

    High: 82 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 63.

    Low: 63 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 94. Heat index values as high as 112. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 11pm. Partly cloudy, with a low around 71. West southwest wind 5 to 15 mph becoming north northeast after midnight. Winds could gust as high as 20 mph.
Tuesday
Mostly sunny, with a high near 81. North northeast wind 10 to 15 mph.
Tuesday Night
Mostly clear, with a low around 61. North northeast wind 5 to 10 mph.
Wednesday
Sunny, with a high near 82. North northeast wind around 5 mph, with gusts as high as 15 mph.
Wednesday Night
Clear, with a low around 63.
Thursday
Sunny, with a high near 84.
Thursday Night
Partly cloudy, with a low around 68.
Friday
A chance of showers. Mostly cloudy, with a high near 83.
Friday Night
A chance of showers. Mostly cloudy, with a low around 67.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 83.
Saturday Night
Partly cloudy, with a low around 66.
Sunday
Mostly sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Marseilles IL
 41.37°N 88.7°W
9:31 am CDT Jul 27, 2026
10am CDT Jul 27, 2026-6pm CDT Aug 2, 2026
 
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Additional Resources

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Hourly Weather Forecast

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