Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

75°F

24°C

Humidity 92%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 17 Aug 1:55 am CDT
Extended Forecast for

Valier IL

Heat Advisory August 17, 02:17am until August 19, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 17, 02:17am until August 19, 07:00pm

    NOW until 7:00pm Tue

    Heat Advisory

  • Overnight

    Low: 75 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny and hot, with a high near 99. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 99 °F

    Sunny then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 10pm.  Partly cloudy, with a low around 75. North northwest wind around 5 mph becoming calm  in the evening.

    Low: 75 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Sunny and hot, with a high near 100. Heat index values as high as 108. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 100 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 76. East wind around 5 mph becoming calm  in the evening.

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny and hot, with a high near 99. Calm wind becoming west around 6 mph in the morning.

    High: 99 °F

    Sunny then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 73. West wind around 5 mph becoming calm  in the evening.

    Low: 73 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms.  Partly sunny, with a high near 91. Light north wind increasing to 5 to 10 mph in the morning.

    High: 91 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 75. Calm wind.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 99. Calm wind becoming southwest around 5 mph in the afternoon.
Sunday Night
A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 75. North northwest wind around 5 mph becoming calm in the evening.
Monday
Sunny and hot, with a high near 100. Heat index values as high as 108. Calm wind becoming northeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 76. East wind around 5 mph becoming calm in the evening.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 99. Calm wind becoming west around 6 mph in the morning.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. West wind around 5 mph becoming calm in the evening.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 91. Light north wind increasing to 5 to 10 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 68. North northeast wind 6 to 9 mph.
Thursday
Mostly sunny, with a high near 89. North northeast wind 6 to 10 mph.
Thursday Night
Mostly clear, with a low around 68. North northeast wind 5 to 9 mph becoming light in the evening.
Friday
Sunny, with a high near 91. North northeast wind 3 to 8 mph.
Friday Night
Mostly clear, with a low around 68. North northeast wind around 6 mph becoming calm in the evening.
Saturday
Sunny, with a high near 92. Calm wind becoming north 5 to 7 mph in the afternoon.
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ABOUT THIS FORECAST

 
Point Forecast:
Valier IL
 38.03°N 89.04°W
1:30 am CDT Aug 17, 2025
2am CDT Aug 17, 2025-6pm CDT Aug 23, 2025
 
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Additional Resources

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