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

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

62°F

17°C

Humidity 67%
Wind Speed SW 3 mph
Barometer 29.93 in
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 18 May 2:55 am CDT
Extended Forecast for

2 Miles ENE Herrin IL

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 59. Calm wind.

    Low: 59 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 77. Light and variable wind.

    High: 77 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Increasing clouds, with a low around 62. Calm wind becoming east southeast around 6 mph after midnight. Chance of precipitation is 60%.

    Low: 62 °F

    Partly Cloudy
    then Showers
    Likely

  • Monday

    Monday: Showers before 7am, then showers and possibly a thunderstorm between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. High near 81. East southeast wind 6 to 10 mph. Chance of precipitation is 90%.

    High: 81 °F

    Showers

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm before 10pm, then showers and thunderstorms likely between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 68. Southeast wind 7 to 9 mph. Chance of precipitation is 90%.

    Low: 68 °F

    T-storms

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. Some of the storms could be severe. High near 82. South southeast wind 10 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 90%.

    High: 82 °F

    Severe
    Thunderstorms

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms before 1am. Some of the storms could be severe. Mostly clear, with a low around 58. West wind 7 to 10 mph, with gusts as high as 18 mph.

    Low: 58 °F

    Severe
    Thunderstorms

  • Wednesday

    Wednesday: A slight chance of showers after 1pm. Mostly sunny, with a high near 68. West wind 10 to 16 mph, with gusts as high as 26 mph.

    High: 68 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers before 1am. Partly cloudy, with a low around 51. Northwest wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 51 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 59. Calm wind.
Sunday
Partly sunny, with a high near 77. Light and variable wind.
Sunday Night
Showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Increasing clouds, with a low around 62. Calm wind becoming east southeast around 6 mph after midnight. Chance of precipitation is 60%.
Monday
Showers before 7am, then showers and possibly a thunderstorm between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. High near 81. East southeast wind 6 to 10 mph. Chance of precipitation is 90%.
Monday Night
Showers likely and possibly a thunderstorm before 10pm, then showers and thunderstorms likely between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 68. Southeast wind 7 to 9 mph. Chance of precipitation is 90%.
Tuesday
Showers and possibly a thunderstorm. Some of the storms could be severe. High near 82. South southeast wind 10 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 90%.
Tuesday Night
A 40 percent chance of showers and thunderstorms before 1am. Some of the storms could be severe. Mostly clear, with a low around 58. West wind 7 to 10 mph, with gusts as high as 18 mph.
Wednesday
A slight chance of showers after 1pm. Mostly sunny, with a high near 68. West wind 10 to 16 mph, with gusts as high as 26 mph.
Wednesday Night
A slight chance of showers before 1am. Partly cloudy, with a low around 51. Northwest wind 8 to 11 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 67. Northwest wind 9 to 13 mph, with gusts as high as 21 mph.
Thursday Night
Mostly clear, with a low around 48. North northwest wind 5 to 7 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 70. Northwest wind 5 to 7 mph.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 52. Light and variable wind.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 73. South wind 3 to 7 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:
2:32 am CDT May 18, 2025
Forecast Valid:
3am CDT May 18, 2025-6pm CDT May 24, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation