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.

Fog/Mist

72°F

22°C

Humidity 94%
Wind Speed N 3 mph
Barometer 30.03 in (1016.5 mb)
Dewpoint 70°F (21°C)
Visibility 6.00 mi
Last update 14 Aug 9:53 am EDT
Extended Forecast for

Arnold PA

  • Today

    Today: Mostly sunny, with a high near 87. Calm wind becoming north around 5 mph in the afternoon.

    High: 87 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, mostly clear, with a low around 63. Light northeast wind.

    Low: 63 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Areas of fog before 9am. Otherwise, sunny and hot, with a high near 90. Calm wind.

    High: 90 °F

    Areas Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 66. Calm wind.

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 91. Calm wind.

    High: 91 °F

    Hot

  • Saturday Night

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

    Low: 66 °F

    Mostly Clear

  • Sunday

    Sunday: A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 92. Chance of precipitation is 30%.

    High: 92 °F

    Sunny then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny and hot, with a high near 90.

    High: 90 °F

    Hot

Detailed Forecast

Today
Mostly sunny, with a high near 87. Calm wind becoming north around 5 mph in the afternoon.
Tonight
Patchy fog after 3am. Otherwise, mostly clear, with a low around 63. Light northeast wind.
Friday
Areas of fog before 9am. Otherwise, sunny and hot, with a high near 90. Calm wind.
Friday Night
Mostly clear, with a low around 66. Calm wind.
Saturday
Sunny and hot, with a high near 91. Calm wind.
Saturday Night
Mostly clear, with a low around 66.
Sunday
A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 92. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 30%.
Monday
Mostly sunny and hot, with a high near 90.
Monday Night
Partly cloudy, with a low around 65.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 40%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 40%.
Wednesday
A chance of showers. Partly sunny, with a high near 84. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Arnold PA
 40.57°N 79.76°W (Elev. 860 ft)
Last Update:
10:05 am EDT Aug 14, 2025
Forecast Valid:
10am EDT Aug 14, 2025-6pm EDT Aug 20, 2025
 
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