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

54°F

12°C

Humidity 100%
Wind Speed NW 6 mph
Barometer 30.00 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 11 Oct 6:45 am CDT
Extended Forecast for

Pittsburg IL

  • Today

    Today: Sunny, with a high near 84. West northwest wind 3 to 7 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 60. Light south southwest wind.

    Low: 60 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 90. Southwest wind 5 to 13 mph, with gusts as high as 18 mph.

    High: 90 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 65. Southwest wind around 8 mph.

    Low: 65 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92. Southwest wind 7 to 11 mph.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69. Southwest wind around 6 mph.

    Low: 69 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 86. West southwest wind 3 to 8 mph. Chance of precipitation is 60%.

    High: 86 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Northeast wind 3 to 6 mph.

    Low: 64 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. East wind 8 to 11 mph becoming south southwest in the afternoon.

    High: 82 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 84. West northwest wind 3 to 7 mph.
Tonight
Mostly clear, with a low around 60. Light south southwest wind.
Columbus Day
Sunny, with a high near 90. Southwest wind 5 to 13 mph, with gusts as high as 18 mph.
Monday Night
Clear, with a low around 65. Southwest wind around 8 mph.
Tuesday
Sunny, with a high near 92. Southwest wind 7 to 11 mph.
Tuesday Night
Mostly clear, with a low around 69. Southwest wind around 6 mph.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 86. West southwest wind 3 to 8 mph. Chance of precipitation is 60%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Northeast wind 3 to 6 mph.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82. East wind 8 to 11 mph becoming south southwest in the afternoon.
Thursday Night
A chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 56. South southwest wind 6 to 10 mph becoming west after midnight.
Friday
A slight chance of showers. Partly sunny, with a high near 70. Northwest wind 14 to 18 mph, with gusts as high as 23 mph.
Friday Night
Partly cloudy, with a low around 43. Breezy, with a north northwest wind 10 to 20 mph.
Saturday
Mostly sunny, with a high near 61. North wind 11 to 15 mph, with gusts as high as 20 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Pittsburg IL
 37.78°N 88.86°W
Last Update:
4:56 am CDT Oct 11, 2026
Forecast Valid:
7am CDT Oct 11, 2026-6pm CDT Oct 17, 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