National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Light Snow

22°F

-6°C

Humidity 78%
Wind Speed NW 12 G 20 mph
Barometer 30.04 in (1019.2 mb)
Dewpoint 16°F (-9°C)
Visibility 9.00 mi
Wind Chill10°F (-12°C)
Last update 18 Jan 4:53 am EST
Extended Forecast for

Monessen PA

  • Overnight

    Overnight: A slight chance of snow. Mostly cloudy, with a low around 19. West wind around 6 mph. Chance of precipitation is 20%.

    Low: 19 °F

    Slight Chance
    Snow

  • Sunday

    Sunday: Mostly cloudy, with a high near 27. West wind 6 to 9 mph.

    High: 27 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A slight chance of snow between 2am and 4am. Increasing clouds, with a low around 16. Southwest wind 5 to 9 mph. Chance of precipitation is 20%.

    Low: 16 °F

    Partly Cloudy
    then Slight
    Chance Snow

  • M.L.King Day

    M.L.King Day: A chance of snow, mainly between 7am and 1pm. Mostly cloudy, with a high near 28. Breezy, with a southwest wind 10 to 15 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 28 °F

    Chance Snow
    and Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 6. West wind 11 to 16 mph, with gusts as high as 29 mph.

    Low: 6 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 20.

    High: 20 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 9.

    Low: 9 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of rain and snow after 1pm. Mostly cloudy, with a high near 39. Chance of precipitation is 30%.

    High: 39 °F

    Partly Sunny
    then Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: A chance of rain and snow before 1am, then a chance of snow. Mostly cloudy, with a low around 22. Chance of precipitation is 40%.

    Low: 22 °F

    Chance
    Rain/Snow

Detailed Forecast

Overnight
A slight chance of snow. Mostly cloudy, with a low around 19. West wind around 6 mph. Chance of precipitation is 20%.
Sunday
Mostly cloudy, with a high near 27. West wind 6 to 9 mph.
Sunday Night
A slight chance of snow between 2am and 4am. Increasing clouds, with a low around 16. Southwest wind 5 to 9 mph. Chance of precipitation is 20%.
M.L.King Day
A chance of snow, mainly between 7am and 1pm. Mostly cloudy, with a high near 28. Breezy, with a southwest wind 10 to 15 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Monday Night
Partly cloudy, with a low around 6. West wind 11 to 16 mph, with gusts as high as 29 mph.
Tuesday
Mostly sunny, with a high near 20.
Tuesday Night
Partly cloudy, with a low around 9.
Wednesday
A chance of rain and snow after 1pm. Mostly cloudy, with a high near 39. Chance of precipitation is 30%.
Wednesday Night
A chance of rain and snow before 1am, then a chance of snow. Mostly cloudy, with a low around 22. Chance of precipitation is 40%.
Thursday
A chance of snow before 1pm. Partly sunny, with a high near 31. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 12.
Friday
Partly sunny, with a high near 36.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 23. Chance of precipitation is 40%.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 34. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Monessen PA
 40.16°N 79.88°W (Elev. 801 ft)
Last Update:
4:37 am EST Jan 18, 2026
Forecast Valid:
5am EST Jan 18, 2026-6pm EST Jan 24, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation