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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Pittsburg IL

  • Overnight

    Overnight: Clear, with a low around 23. Light northwest wind.

    Low: 23 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 40. Light and variable wind becoming north northwest 5 to 7 mph.

    High: 40 °F

    Sunny

  • Friday Night

    Friday Night: A 30 percent chance of snow showers, mainly after 5am. Mostly cloudy, with a steady temperature around 32. Calm wind becoming southeast around 6 mph after midnight.

    Low: 32 °F

    Mostly Cloudy
    then Chance
    Snow Showers

  • Saturday

    Saturday: Snow likely, possibly mixed with rain and sleet before 9am, then rain likely, possibly mixed with snow between 9am and 11am, then rain after 11am. High near 40. Southeast wind 7 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.

    High: 40 °F

    Wintry Mix
    then Rain

  • Saturday Night

    Saturday Night: Rain, mainly before midnight. Low around 27. South wind 11 to 15 mph becoming west northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%.

    Low: 27 °F

    Rain then
    Chance Rain

  • Sunday

    Sunday: Mostly cloudy, with a high near 34. West northwest wind 10 to 15 mph, with gusts as high as 22 mph.

    High: 34 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 21. North northwest wind 5 to 8 mph becoming northeast after midnight.

    Low: 21 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 33. East northeast wind around 6 mph.

    High: 33 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A chance of snow. Mostly cloudy, with a low around 22. Light north northeast wind.

    Low: 22 °F

    Chance Snow

Detailed Forecast

Overnight
Clear, with a low around 23. Light northwest wind.
Friday
Sunny, with a high near 40. Light and variable wind becoming north northwest 5 to 7 mph.
Friday Night
A 30 percent chance of snow showers, mainly after 5am. Mostly cloudy, with a steady temperature around 32. Calm wind becoming southeast around 6 mph after midnight.
Saturday
Snow likely, possibly mixed with rain and sleet before 9am, then rain likely, possibly mixed with snow between 9am and 11am, then rain after 11am. High near 40. Southeast wind 7 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 100%.
Saturday Night
Rain, mainly before midnight. Low around 27. South wind 11 to 15 mph becoming west northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%.
Sunday
Mostly cloudy, with a high near 34. West northwest wind 10 to 15 mph, with gusts as high as 22 mph.
Sunday Night
Mostly cloudy, with a low around 21. North northwest wind 5 to 8 mph becoming northeast after midnight.
Monday
Mostly cloudy, with a high near 33. East northeast wind around 6 mph.
Monday Night
A chance of snow. Mostly cloudy, with a low around 22. Light north northeast wind.
Tuesday
Partly sunny, with a high near 34. North northwest wind 3 to 6 mph.
Tuesday Night
Partly cloudy, with a low around 20. Calm wind.
Wednesday
Mostly sunny, with a high near 41. Calm wind becoming south southwest 5 to 8 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 26. Calm wind becoming west northwest around 5 mph after midnight.
Thursday
Partly sunny, with a high near 38. Northwest wind 5 to 7 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:
3:31 am CST Nov 28, 2025
Forecast Valid:
3am CST Nov 28, 2025-6pm CST Dec 4, 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