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

66°F

19°C

Humidity 94%
Wind Speed Calm
Barometer 30.04 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 20 Jun 6:15 am CDT
Extended Forecast for

Logan IL

  • Today

    Today: Mostly sunny, with a high near 88. Light and variable wind.

    High: 88 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 67. Calm wind.

    Low: 67 °F

    Mostly Clear

  • Sunday

    Sunday: Showers and thunderstorms likely before 4pm, then showers likely after 5pm. Partly sunny, with a high near 87. Breezy, with a south wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 60%.

    High: 87 °F

    Showers
    Likely and
    Breezy

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 69. South southwest wind 10 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.

    Low: 69 °F

    T-storms then
    Showers

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 81. Northwest wind 8 to 10 mph.

    High: 81 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63. North wind 5 to 8 mph becoming calm in the evening.

    Low: 63 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. Light north northeast wind.

    High: 82 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 84. Light and variable wind.

    High: 84 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 88. Light and variable wind.
Tonight
Mostly clear, with a low around 67. Calm wind.
Sunday
Showers and thunderstorms likely before 4pm, then showers likely after 5pm. Partly sunny, with a high near 87. Breezy, with a south wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 60%.
Sunday Night
Showers and possibly a thunderstorm. Low around 69. South southwest wind 10 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.
Monday
A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 81. Northwest wind 8 to 10 mph.
Monday Night
Partly cloudy, with a low around 63. North wind 5 to 8 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 82. Light north northeast wind.
Tuesday Night
Mostly clear, with a low around 63. Calm wind.
Wednesday
Sunny, with a high near 84. Light and variable wind.
Wednesday Night
Mostly clear, with a low around 64. Light and variable wind.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. Calm wind becoming west around 5 mph in the afternoon.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 64. Light north wind.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. Calm wind becoming south southwest around 5 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Logan IL
 37.93°N 88.85°W
Last Update:
5:26 am CDT Jun 20, 2026
Forecast Valid:
6am CDT Jun 20, 2026-6pm CDT Jun 26, 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