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.

Mostly Cloudy

76°F

24°C

Humidity 67%
Wind Speed N 8 mph
Barometer 30.14 in (1020.1 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 28 Aug 1:53 pm EDT
Extended Forecast for

Monessen PA

  • This Afternoon

    This Afternoon: A slight chance of showers after 3pm. Mostly sunny, with a high near 81. North wind around 7 mph. Chance of precipitation is 20%.

    High: 81 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, mostly clear, with a low around 55. Northeast wind around 5 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, sunny, with a high near 84. Calm wind.

    High: 84 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 87. Light and variable wind becoming west 5 to 8 mph in the morning.

    High: 87 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 89.

    High: 89 °F

    Partly Sunny

  • Monday Night

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

    Low: 70 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 92.

    High: 92 °F

    Hot

Detailed Forecast

This Afternoon
A slight chance of showers after 3pm. Mostly sunny, with a high near 81. North wind around 7 mph. Chance of precipitation is 20%.
Tonight
Patchy fog after 2am. Otherwise, mostly clear, with a low around 55. Northeast wind around 5 mph becoming calm in the evening.
Saturday
Patchy fog before 9am. Otherwise, sunny, with a high near 84. Calm wind.
Saturday Night
Partly cloudy, with a low around 63. Calm wind.
Sunday
Mostly sunny, with a high near 87. Light and variable wind becoming west 5 to 8 mph in the morning.
Sunday Night
Partly cloudy, with a low around 68.
Monday
Partly sunny, with a high near 89.
Monday Night
Partly cloudy, with a low around 70.
Tuesday
Mostly sunny and hot, with a high near 92.
Tuesday Night
Partly cloudy, with a low around 72.
Wednesday
A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 91. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 50%.
Thursday
A chance of showers. Partly sunny, with a high near 88. 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:
2:21 pm EDT Aug 28, 2026
Forecast Valid:
2pm EDT Aug 28, 2026-6pm EDT Sep 3, 2026
 
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