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

64°F

18°C

Humidity 75%
Wind Speed NW 9 mph
Barometer 29.92 in (1012.8 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 30 Jul 1:53 am EDT
Extended Forecast for

Monessen PA

  • Overnight

    Overnight: Clear, with a low around 56. Light northwest wind.

    Low: 56 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 83. Calm wind becoming northwest 5 to 9 mph in the morning.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 56. Northwest wind around 6 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Areas of fog before 8am. Otherwise, sunny, with a high near 86. Calm wind.

    High: 86 °F

    Areas Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 86.

    High: 86 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 66. Chance of precipitation is 70%.

    Low: 66 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 81. Chance of precipitation is 80%.

    High: 81 °F

    Showers

  • Sunday Night

    Sunday Night: Showers likely before 8pm. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.

    Low: 64 °F

    Showers
    Likely then
    Mostly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 56. Light northwest wind.
Thursday
Sunny, with a high near 83. Calm wind becoming northwest 5 to 9 mph in the morning.
Thursday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 56. Northwest wind around 6 mph becoming calm in the evening.
Friday
Areas of fog before 8am. Otherwise, sunny, with a high near 86. Calm wind.
Friday Night
Mostly cloudy, with a low around 63. Calm wind.
Saturday
Mostly cloudy, with a high near 86.
Saturday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 66. Chance of precipitation is 70%.
Sunday
Showers and possibly a thunderstorm. High near 81. Chance of precipitation is 80%.
Sunday Night
Showers likely before 8pm. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 84.
Monday Night
Mostly clear, with a low around 64.
Tuesday
Sunny, with a high near 87.
Tuesday Night
Partly cloudy, with a low around 67.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 87. 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:
2:21 am EDT Jul 30, 2026
Forecast Valid:
2am EDT Jul 30, 2026-6pm EDT Aug 5, 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