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.

Partly Cloudy

76°F

24°C

Humidity 67%
Wind Speed SW 12 mph
Barometer 29.99 in (1015.3 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 19 Aug 6:53 pm EDT
Extended Forecast for

Cheswick PA

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 4am, then a chance of showers between 4am and 5am, then a chance of showers and thunderstorms after 5am. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 63. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Slight Chance
    T-storms then
    Chance
    Showers and
    Patchy Fog

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 11am, then a chance of showers and thunderstorms, mainly between 11am and 5pm. Patchy fog before noon. High near 79. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 79 °F

    Showers and
    Patchy Fog
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers between 8pm and 2am. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 57. Northeast wind 3 to 5 mph. Chance of precipitation is 20%.

    Low: 57 °F

    Slight Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: A slight chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 82. East wind 3 to 6 mph. Chance of precipitation is 20%.

    High: 82 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 61. East wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Partly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.

    Low: 61 °F

    Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers after 8am. Partly sunny, with a high near 79. Chance of precipitation is 30%.

    High: 79 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 4am, then a chance of showers between 4am and 5am, then a chance of showers and thunderstorms after 5am. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 63. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and possibly a thunderstorm before 11am, then a chance of showers and thunderstorms, mainly between 11am and 5pm. Patchy fog before noon. High near 79. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
A slight chance of showers between 8pm and 2am. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 57. Northeast wind 3 to 5 mph. Chance of precipitation is 20%.
Friday
A slight chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 82. East wind 3 to 6 mph. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 61. East wind around 5 mph becoming calm in the evening.
Saturday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
Sunday
A chance of showers after 8am. Partly sunny, with a high near 79. Chance of precipitation is 30%.
Sunday Night
Mostly clear, with a low around 56.
Monday
Sunny, with a high near 78.
Monday Night
Partly cloudy, with a low around 56.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Partly cloudy, with a low around 59.
Wednesday
Partly sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Cheswick PA
 40.55°N 79.79°W (Elev. 1066 ft)
Last Update:
7:01 pm EDT Aug 19, 2026
Forecast Valid:
7pm EDT Aug 19, 2026-6pm EDT Aug 26, 2026
 
Forecast Discussion
 
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Additional Resources

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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