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.

Mostly Cloudy

46°F

8°C

Humidity 62%
Wind Speed N 14 mph
Barometer 29.99 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 12 Nov 4:45 pm CST
Extended Forecast for

Pittsburg IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 57. North northwest wind around 14 mph, with gusts as high as 28 mph.

    High: 57 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 33. North northwest wind 7 to 13 mph, with gusts as high as 21 mph.

    Low: 33 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 48. North northwest wind 9 to 14 mph, with gusts as high as 20 mph.

    High: 48 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 27. North northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 27 °F

    Gradual
    Clearing

  • Saturday

    Saturday: Sunny, with a high near 50. North northwest wind around 5 mph becoming calm in the afternoon.

    High: 50 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 26. Calm wind.

    Low: 26 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 53. Light and variable wind.

    High: 53 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 29. Calm wind.

    Low: 29 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 55. Calm wind becoming east around 5 mph.

    High: 55 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 57. North northwest wind around 14 mph, with gusts as high as 28 mph.
Tonight
Mostly clear, with a low around 33. North northwest wind 7 to 13 mph, with gusts as high as 21 mph.
Friday
Partly sunny, with a high near 48. North northwest wind 9 to 14 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 27. North northwest wind 5 to 7 mph becoming calm in the evening.
Saturday
Sunny, with a high near 50. North northwest wind around 5 mph becoming calm in the afternoon.
Saturday Night
Clear, with a low around 26. Calm wind.
Sunday
Sunny, with a high near 53. Light and variable wind.
Sunday Night
Mostly clear, with a low around 29. Calm wind.
Monday
Sunny, with a high near 55. Calm wind becoming east around 5 mph.
Monday Night
Mostly clear, with a low around 29. Calm wind.
Tuesday
Sunny, with a high near 58. Calm wind becoming east southeast around 5 mph.
Tuesday Night
Clear, with a low around 30. Calm wind.
Wednesday
Sunny, with a high near 63. Calm wind becoming south around 6 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Pittsburg IL
 37.78°N 88.86°W
Last Update:
3:20 pm CST Nov 12, 2026
Forecast Valid:
4pm CST Nov 12, 2026-6pm CST Nov 18, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation