National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Fair

76°F

24°C

Humidity 72%
Wind Speed NW 3 mph
Barometer 29.99 in (1015.2 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 13 Aug 6:53 pm EDT
Extended Forecast for

Arnold PA

  • Tonight

    Tonight: Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 65. Northwest wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: A chance of showers and thunderstorms, mainly after 5pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 83. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    Chance
    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers after 3am. Patchy fog between midnight and 1am. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 63. Light northeast wind. Chance of precipitation is 20%.

    Low: 63 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: A slight chance of showers after 2pm. Mostly sunny, with a high near 85. East wind 3 to 5 mph. Chance of precipitation is 20%.

    High: 85 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 68. Light south wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 68 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 86. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 86 °F

    Showers
    Likely then
    T-storms

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Low around 68. Chance of precipitation is 80%.

    Low: 68 °F

    T-storms then
    Chance
    T-storms

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 50%.

    High: 83 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of thunderstorms before 8pm. Patchy fog after 3am. Otherwise, partly cloudy, with a low around 61. Chance of precipitation is 30%.

    Low: 61 °F

    Chance
    T-storms then
    Patchy Fog

Detailed Forecast

Tonight
Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 65. Northwest wind around 5 mph becoming calm in the evening.
Friday
A chance of showers and thunderstorms, mainly after 5pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 83. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers after 3am. Patchy fog between midnight and 1am. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 63. Light northeast wind. Chance of precipitation is 20%.
Saturday
A slight chance of showers after 2pm. Mostly sunny, with a high near 85. East wind 3 to 5 mph. Chance of precipitation is 20%.
Saturday Night
A chance of showers before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 68. Light south wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Showers and possibly a thunderstorm. High near 86. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Low around 68. Chance of precipitation is 80%.
Monday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 50%.
Monday Night
A chance of thunderstorms before 8pm. Patchy fog after 3am. Otherwise, partly cloudy, with a low around 61. Chance of precipitation is 30%.
Tuesday
Areas of fog before 9am. Otherwise, sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Arnold PA
 40.57°N 79.76°W (Elev. 860 ft)
Last Update:
2:21 pm EDT Aug 13, 2026
Forecast Valid:
6pm EDT Aug 13, 2026-6pm EDT Aug 20, 2026
 
Forecast Discussion
 
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Additional Resources

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