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

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Overcast

59°F

15°C

Humidity 78%
Wind Speed E 6 mph
Barometer 30.08 in (1019.0 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 13 Oct 9:53 pm EDT
Extended Forecast for

Monessen PA

  • Tonight

    Tonight: Partly cloudy, with a low around 47. North wind 3 to 5 mph.

    Low: 47 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 72. North wind 5 to 11 mph.

    High: 72 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 46. North wind 5 to 7 mph becoming calm after midnight.

    Low: 46 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 67. Light northwest wind increasing to 5 to 10 mph in the morning.

    High: 67 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 35. Northwest wind 5 to 9 mph becoming calm after midnight.

    Low: 35 °F

    Clear

  • Thursday

    Thursday: Patchy frost before 9am. Otherwise, sunny, with a high near 63.

    High: 63 °F

    Patchy Frost
    then Sunny

  • Thursday Night

    Thursday Night: Areas of frost after 5am. Otherwise, clear, with a low around 34.

    Low: 34 °F

    Clear then
    Areas Frost

  • Friday

    Friday: Areas of frost before 9am. Otherwise, sunny, with a high near 68.

    High: 68 °F

    Areas Frost
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 47. North wind 3 to 5 mph.
Tuesday
Mostly sunny, with a high near 72. North wind 5 to 11 mph.
Tuesday Night
Mostly clear, with a low around 46. North wind 5 to 7 mph becoming calm after midnight.
Wednesday
Mostly sunny, with a high near 67. Light northwest wind increasing to 5 to 10 mph in the morning.
Wednesday Night
Clear, with a low around 35. Northwest wind 5 to 9 mph becoming calm after midnight.
Thursday
Patchy frost before 9am. Otherwise, sunny, with a high near 63.
Thursday Night
Areas of frost after 5am. Otherwise, clear, with a low around 34.
Friday
Areas of frost before 9am. Otherwise, sunny, with a high near 68.
Friday Night
Mostly cloudy, with a low around 45.
Saturday
Mostly sunny, with a high near 77.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 55. Chance of precipitation is 40%.
Sunday
Showers likely. Mostly cloudy, with a high near 71. Chance of precipitation is 70%.
Sunday Night
Showers likely. Mostly cloudy, with a low around 45. Chance of precipitation is 60%.
Monday
A chance of showers. Mostly sunny, with a high near 62. Chance of precipitation is 30%.
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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:
9:28 pm EDT Oct 13, 2025
Forecast Valid:
10pm EDT Oct 13, 2025-6pm EDT Oct 20, 2025
 
Forecast Discussion
 
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Additional Resources

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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