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.

Light Drizzle

41°F

5°C

Humidity 95%
Wind Speed Calm
Barometer 30.10 in
Dewpoint 40°F (4°C)
Visibility 3.00 mi
Last update 3 Mar 5:35 am CST
Extended Forecast for

2 Miles ESE Herrin IL

  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms. Cloudy, with a steady temperature around 43. Light east wind.

    Low: 43 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 70. Light and variable wind becoming south southwest 5 to 10 mph in the morning. Chance of precipitation is 60%.

    High: 70 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 56. South wind around 6 mph becoming east in the evening. Chance of precipitation is 70%.

    Low: 56 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 71. South southwest wind 6 to 10 mph. Chance of precipitation is 90%.

    High: 71 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 58. South wind 6 to 9 mph. Chance of precipitation is 80%.

    Low: 58 °F

    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 71. Southwest wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 71 °F

    Showers

  • Thursday Night

    Thursday Night: A chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 59. South wind 5 to 7 mph. Chance of precipitation is 50%.

    Low: 59 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday

    Friday: A slight chance of showers and thunderstorms. Partly sunny, with a high near 79. South southwest wind 8 to 16 mph, with gusts as high as 25 mph.

    High: 79 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 62. South wind around 11 mph, with gusts as high as 21 mph.

    Low: 62 °F

    Showers
    Likely

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms. Cloudy, with a steady temperature around 43. Light east wind.
Tuesday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 70. Light and variable wind becoming south southwest 5 to 10 mph in the morning. Chance of precipitation is 60%.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 56. South wind around 6 mph becoming east in the evening. Chance of precipitation is 70%.
Wednesday
Showers and possibly a thunderstorm. High near 71. South southwest wind 6 to 10 mph. Chance of precipitation is 90%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 58. South wind 6 to 9 mph. Chance of precipitation is 80%.
Thursday
Showers and possibly a thunderstorm. High near 71. Southwest wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Thursday Night
A chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 59. South wind 5 to 7 mph. Chance of precipitation is 50%.
Friday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 79. South southwest wind 8 to 16 mph, with gusts as high as 25 mph.
Friday Night
A slight chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 62. South wind around 11 mph, with gusts as high as 21 mph.
Saturday
Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Cloudy, with a high near 71. South southwest wind 7 to 13 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 48. West northwest wind around 6 mph becoming calm in the evening.
Sunday
A slight chance of showers. Mostly cloudy, with a high near 67. Calm wind becoming south southwest 5 to 8 mph in the morning.
Sunday Night
A slight chance of showers. Mostly cloudy, with a low around 53. South southwest wind around 6 mph.
Monday
A chance of showers. Sunny, with a high near 74. West southwest wind 6 to 10 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE Herrin IL
 37.8°N 89°W
Last Update:
3:41 am CST Mar 3, 2026
Forecast Valid:
5am CST Mar 3, 2026-6pm CDT Mar 9, 2026
 
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