National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

75°F

24°C

Humidity 47%
Wind Speed S 14 mph
Barometer 29.97 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 23 Apr 10:47 am CDT
Extended Forecast for

Herrin ILSimilar City Names

  • Today

    Today: Mostly sunny, with a high near 82. South wind 11 to 17 mph, with gusts as high as 25 mph.

    High: 82 °F

    Mostly Sunny

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Increasing clouds, with a low around 64. South wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 64 °F

    Mostly Clear
    then Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7am. High near 74. South southwest wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.

    High: 74 °F

    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 55. West southwest wind around 6 mph becoming light and variable in the evening.

    Low: 55 °F

    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 78. Northeast wind 5 to 7 mph.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 54. Northeast wind around 6 mph.

    Low: 54 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 77. East southeast wind 6 to 8 mph.

    High: 77 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. East southeast wind 7 to 10 mph, with gusts as high as 18 mph.

    Low: 62 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday

    Monday: Showers and possibly a thunderstorm. Partly sunny, with a high near 79. Breezy, with a south wind 13 to 21 mph, with gusts as high as 29 mph.

    High: 79 °F

    Showers and
    Breezy

Detailed Forecast

Today
Mostly sunny, with a high near 82. South wind 11 to 17 mph, with gusts as high as 25 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Increasing clouds, with a low around 64. South wind 11 to 14 mph, with gusts as high as 22 mph.
Friday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7am. High near 74. South southwest wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.
Friday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 55. West southwest wind around 6 mph becoming light and variable in the evening.
Saturday
Sunny, with a high near 78. Northeast wind 5 to 7 mph.
Saturday Night
Partly cloudy, with a low around 54. Northeast wind around 6 mph.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 77. East southeast wind 6 to 8 mph.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. East southeast wind 7 to 10 mph, with gusts as high as 18 mph.
Monday
Showers and possibly a thunderstorm. Partly sunny, with a high near 79. Breezy, with a south wind 13 to 21 mph, with gusts as high as 29 mph.
Monday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 56. South southwest wind 7 to 16 mph becoming west after midnight. Winds could gust as high as 23 mph.
Tuesday
Sunny, with a high near 74. West northwest wind 7 to 9 mph.
Tuesday Night
Mostly clear, with a low around 51. Light north wind.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 73. Light and variable wind becoming south 5 to 7 mph in the morning.
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ABOUT THIS FORECAST

 
Point Forecast:
Herrin ILSimilar City Names
 37.8°N 89.03°W
Last Update:
9:17 am CDT Apr 23, 2026
Forecast Valid:
11am CDT Apr 23, 2026-6pm CDT Apr 29, 2026
 
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Additional Resources

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