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.

Partly Cloudy

72°F

22°C

Humidity 68%
Wind Speed S 9 mph
Barometer 29.92 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 15 Apr 2:55 am CDT
Extended Forecast for

2 Miles ENE Herrin IL

  • Overnight

    Overnight: Partly cloudy, with a low around 70. South southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 70 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 85. South southwest wind 11 to 18 mph, with gusts as high as 29 mph.

    High: 85 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Low around 66. South southwest wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    Low: 66 °F

    Slight Chance
    T-storms then
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7am. Mostly cloudy, then gradually becoming sunny, with a high near 82. Southwest wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

    High: 82 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 62. South southwest wind 3 to 7 mph. Chance of precipitation is 20%.

    Low: 62 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Light south wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 21 mph.

    High: 88 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 61. South wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    Low: 61 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 74. South southwest wind 14 to 16 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 74 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers, mainly before 1am. Partly cloudy, with a low around 42. West northwest wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 42 °F

    Chance
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 70. South southwest wind around 10 mph, with gusts as high as 20 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 85. South southwest wind 11 to 18 mph, with gusts as high as 29 mph.
Wednesday Night
Showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Low around 66. South southwest wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7am. Mostly cloudy, then gradually becoming sunny, with a high near 82. Southwest wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Thursday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 62. South southwest wind 3 to 7 mph. Chance of precipitation is 20%.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Light south wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 21 mph.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 61. South wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Saturday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 74. South southwest wind 14 to 16 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
A chance of showers, mainly before 1am. Partly cloudy, with a low around 42. West northwest wind 8 to 11 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 65. West northwest wind 8 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 41. Northwest wind 5 to 7 mph becoming light and variable after midnight.
Monday
Sunny, with a high near 71. South southeast wind 5 to 9 mph.
Monday Night
Partly cloudy, with a low around 49. South wind around 6 mph.
Tuesday
Sunny, with a high near 77. South southwest wind 7 to 13 mph, with gusts as high as 20 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Herrin IL
 37.8°N 89°W
Last Update:
1:51 am CDT Apr 15, 2026
Forecast Valid:
3am CDT Apr 15, 2026-6pm CDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation