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.

Fair

68°F

20°C

Humidity 96%
Wind Speed N 3 mph
Barometer 30.00 in (1015.5 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 27 Aug 10:53 pm EDT
Extended Forecast for

Monessen PA

  • Tonight

    Tonight: Patchy dense fog. Otherwise, partly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Patchy Dense
    Fog

  • Friday

    Friday: Areas of dense fog before 10am. Otherwise, mostly sunny, with a high near 82. Calm wind becoming north around 5 mph in the afternoon.

    High: 82 °F

    Areas Dense
    Fog then
    Mostly Sunny

  • Friday Night

    Friday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 59. Light north wind.

    Low: 59 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 83. Calm wind.

    High: 83 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62. Calm wind.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 70.

    Low: 70 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Patchy dense fog. Otherwise, partly cloudy, with a low around 64. Calm wind.
Friday
Areas of dense fog before 10am. Otherwise, mostly sunny, with a high near 82. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 59. Light north wind.
Saturday
Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 83. Calm wind.
Saturday Night
Mostly clear, with a low around 62. Calm wind.
Sunday
Mostly sunny, with a high near 86.
Sunday Night
Partly cloudy, with a low around 67.
Monday
Mostly sunny, with a high near 89.
Monday Night
Mostly cloudy, with a low around 70.
Tuesday
Partly sunny and hot, with a high near 90.
Tuesday Night
Mostly cloudy, with a low around 71.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 40%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 50%.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Monessen PA
 40.16°N 79.88°W (Elev. 801 ft)
Last Update:
9:29 pm EDT Aug 27, 2026
Forecast Valid:
11pm EDT Aug 27, 2026-6pm EDT Sep 3, 2026
 
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Additional Resources

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Chance of Precipitation