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

46°F

8°C

Humidity 51%
Wind Speed SW 6 mph
Barometer 29.93 in (1014.3 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 8 May 12:53 am EDT
Extended Forecast for

Monessen PA

  • Overnight

    Overnight: Mostly clear, with a low around 40. Calm wind.

    Low: 40 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers after 2pm. Partly sunny, with a high near 64. West wind 9 to 14 mph. Chance of precipitation is 20%.

    High: 64 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Showers likely, mainly after 4am. Mostly cloudy, with a low around 48. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 48 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Saturday

    Saturday: Showers and thunderstorms, mainly before 3pm. High near 69. South wind 8 to 13 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 69 °F

    Showers then
    Chance
    Showers

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 50. Southwest wind around 6 mph. Chance of precipitation is 20%.

    Low: 50 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: A chance of showers, mainly after 2pm. Partly sunny, with a high near 70. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    High: 70 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers. Mostly cloudy, with a low around 45. Chance of precipitation is 50%.

    Low: 45 °F

    Chance
    Showers

  • Monday

    Monday: Partly sunny, with a high near 61.

    High: 61 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 40. Calm wind.
Friday
A slight chance of showers after 2pm. Partly sunny, with a high near 64. West wind 9 to 14 mph. Chance of precipitation is 20%.
Friday Night
Showers likely, mainly after 4am. Mostly cloudy, with a low around 48. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Showers and thunderstorms, mainly before 3pm. High near 69. South wind 8 to 13 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 50. Southwest wind around 6 mph. Chance of precipitation is 20%.
Sunday
A chance of showers, mainly after 2pm. Partly sunny, with a high near 70. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 45. Chance of precipitation is 50%.
Monday
Partly sunny, with a high near 61.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Sunny, with a high near 63.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Wednesday
Showers likely. Mostly cloudy, with a high near 65. Chance of precipitation is 70%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 46. Chance of precipitation is 40%.
Thursday
Partly sunny, with a high near 68.
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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:
1:11 am EDT May 8, 2026
Forecast Valid:
1am EDT May 8, 2026-6pm EDT May 14, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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