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

56°F

13°C

Humidity 55%
Wind Speed NA
Barometer 30.06 in (1018.7 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 15 May 10:53 am EDT
Extended Forecast for

Monessen PA

  • Today

    Today: Sunny early, then becoming mostly cloudy, with a high near 68. West wind 5 to 7 mph.

    High: 68 °F

    Mostly Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 49. Light and variable wind.

    Low: 49 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Increasing clouds, with a high near 80. Southwest wind 6 to 14 mph. Chance of precipitation is 40%.

    High: 80 °F

    Sunny then
    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely, then showers after 11pm. Low around 61. Southwest wind 6 to 8 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Showers

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 2pm. High near 81. Southwest wind around 6 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Showers then
    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Tuesday

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

    High: 92 °F

    Hot

Detailed Forecast

Today
Sunny early, then becoming mostly cloudy, with a high near 68. West wind 5 to 7 mph.
Tonight
Partly cloudy, with a low around 49. Light and variable wind.
Saturday
A slight chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Increasing clouds, with a high near 80. Southwest wind 6 to 14 mph. Chance of precipitation is 40%.
Saturday Night
Showers and thunderstorms likely, then showers after 11pm. Low around 61. Southwest wind 6 to 8 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers, with thunderstorms also possible after 2pm. High near 81. Southwest wind around 6 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Mostly clear, with a low around 64.
Monday
Sunny, with a high near 89.
Monday Night
Mostly clear, with a low around 66.
Tuesday
Mostly sunny and hot, with a high near 92.
Tuesday Night
A chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.
Wednesday
Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 58. Chance of precipitation is 80%.
Thursday
A chance of showers. Partly sunny, with a high near 74. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Monessen PA
 40.14°N 79.88°W (Elev. 1086 ft)
Last Update:
6:52 am EDT May 15, 2026
Forecast Valid:
11am EDT May 15, 2026-6pm EDT May 21, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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