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

Pittsburgh International Airport (KPIT)

Lat: 40.48°NLon: 80.21°WElev: 1203ft.

Mostly Cloudy

64°F

18°C

Humidity 46%
Wind Speed E 9 mph
Barometer 30.19 in (1023.1 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 21 May 5:51 pm EDT
Extended Forecast for

Carnegie PA

  • Tonight

    Tonight: Mostly cloudy, with a low around 53. East wind around 9 mph.

    Low: 53 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of showers after 4pm. Mostly cloudy, with a high near 67. East wind 10 to 14 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 67 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers, with thunderstorms also possible after 2am. Low around 51. East wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 51 °F

    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 65. East wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 65 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 55. Southeast wind 7 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 55 °F

    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 8am. Mostly cloudy, with a high near 80. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.

    Low: 61 °F

    Showers
    Likely

  • Memorial Day

    Memorial Day: A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 76. Chance of precipitation is 50%.

    High: 76 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of thunderstorms before 8pm. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.

    Low: 61 °F

    Chance
    T-storms then
    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 53. East wind around 9 mph.
Friday
A chance of showers after 4pm. Mostly cloudy, with a high near 67. East wind 10 to 14 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Showers, with thunderstorms also possible after 2am. Low around 51. East wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
Showers and possibly a thunderstorm. High near 65. East wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday Night
Showers and possibly a thunderstorm. Low around 55. Southeast wind 7 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers, with thunderstorms also possible after 8am. Mostly cloudy, with a high near 80. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.
Memorial Day
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 76. Chance of precipitation is 50%.
Monday Night
A chance of thunderstorms before 8pm. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.
Tuesday
A chance of showers after 8am. Mostly cloudy, with a high near 82. Chance of precipitation is 40%.
Tuesday Night
Mostly cloudy, with a low around 62.
Wednesday
A chance of showers. Partly sunny, with a high near 81. Chance of precipitation is 40%.
Wednesday Night
Mostly cloudy, with a low around 61.
Thursday
Mostly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Carnegie PA
 40.4°N 80.08°W (Elev. 899 ft)
Last Update:
2:21 pm EDT May 21, 2026
Forecast Valid:
6pm EDT May 21, 2026-6pm EDT May 28, 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