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.

Partly Cloudy

48°F

9°C

Humidity 58%
Wind Speed S 9 mph
Barometer 29.95 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 6 Dec 2:45 pm CST
Extended Forecast for

Pittsburg IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 48. South southeast wind 3 to 5 mph.

    High: 48 °F

    Partly Sunny

  • Tonight

    Tonight: A slight chance of drizzle after 4am. Patchy fog between 10pm and midnight. Otherwise, mostly cloudy, with a low around 34. Light south southeast wind.

    Low: 34 °F

    Patchy Fog
    then Slight
    Chance
    Drizzle

  • Sunday

    Sunday: A slight chance of drizzle. Cloudy, with a high near 46. Light and variable wind becoming north northwest 6 to 11 mph in the morning.

    High: 46 °F

    Slight Chance
    Drizzle

  • Sunday Night

    Sunday Night: A slight chance of rain and snow showers before 11pm, then a slight chance of snow showers between 11pm and midnight. Mostly cloudy, with a low around 25. North wind 7 to 11 mph. Chance of precipitation is 20%.

    Low: 25 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 37. North wind 5 to 7 mph becoming calm in the afternoon.

    High: 37 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 25. Calm wind becoming south southwest 5 to 9 mph after midnight.

    Low: 25 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 48. South southwest wind 10 to 16 mph, with gusts as high as 23 mph.

    High: 48 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 41. South southwest wind 15 to 17 mph, with gusts as high as 25 mph.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers after noon. Partly sunny, with a high near 52. Southwest wind 8 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.

    High: 52 °F

    Partly Sunny
    then Slight
    Chance
    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 48. South southeast wind 3 to 5 mph.
Tonight
A slight chance of drizzle after 4am. Patchy fog between 10pm and midnight. Otherwise, mostly cloudy, with a low around 34. Light south southeast wind.
Sunday
A slight chance of drizzle. Cloudy, with a high near 46. Light and variable wind becoming north northwest 6 to 11 mph in the morning.
Sunday Night
A slight chance of rain and snow showers before 11pm, then a slight chance of snow showers between 11pm and midnight. Mostly cloudy, with a low around 25. North wind 7 to 11 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 37. North wind 5 to 7 mph becoming calm in the afternoon.
Monday Night
Mostly clear, with a low around 25. Calm wind becoming south southwest 5 to 9 mph after midnight.
Tuesday
Mostly sunny, with a high near 48. South southwest wind 10 to 16 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly cloudy, with a low around 41. South southwest wind 15 to 17 mph, with gusts as high as 25 mph.
Wednesday
A slight chance of showers after noon. Partly sunny, with a high near 52. Southwest wind 8 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.
Wednesday Night
A slight chance of rain showers before midnight, then a slight chance of rain and snow showers. Mostly cloudy, with a low around 29. Northwest wind 5 to 7 mph becoming east after midnight.
Thursday
A chance of rain and snow showers. Mostly cloudy, with a high near 41. East wind 6 to 10 mph becoming west in the afternoon.
Thursday Night
Mostly cloudy, with a low around 23. West northwest wind 6 to 8 mph.
Friday
Partly sunny, with a high near 31. Northwest wind 8 to 11 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:
3:16 pm CST Dec 6, 2025
Forecast Valid:
3pm CST Dec 6, 2025-6pm CST Dec 12, 2025
 
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Additional Resources

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Chance of Precipitation