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

Hazardous Weather Conditions

Current conditions at

Pittsburgh International Airport (KPIT)

Lat: 40.48°NLon: 80.21°WElev: 1203ft.

Partly Cloudy

91°F

33°C

Humidity 50%
Wind Speed SW 9 mph
Barometer 30.03 in (1016.4 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 2 Sep 3:51 pm EDT
Extended Forecast for

Carnegie PA

Heat Advisory September 2, 03:54pm until September 3, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 2, 03:54pm until September 3, 08:00pm

    NOW until 8:00pm Thu

    Heat Advisory

  • This Afternoon

    High: 90 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 72. Southwest wind around 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 72 °F

    Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: A slight chance of showers between 9am and 11am, then a chance of showers and thunderstorms after 11am. Increasing clouds and hot, with a high near 90. Southwest wind 5 to 9 mph becoming northwest in the afternoon. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 90 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 2am, then showers likely and possibly a thunderstorm between 2am and 3am, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 71. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Showers
    Likely

  • Friday

    Friday: Showers, with thunderstorms also possible after 2pm. High near 85. West wind 3 to 8 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 85 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms after 5pm. Mostly sunny and hot, with a high near 90. Heat index values as high as 101. Southwest wind around 8 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 72. Southwest wind around 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A slight chance of showers between 9am and 11am, then a chance of showers and thunderstorms after 11am. Increasing clouds and hot, with a high near 90. Southwest wind 5 to 9 mph becoming northwest in the afternoon. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and thunderstorms likely before 2am, then showers likely and possibly a thunderstorm between 2am and 3am, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 71. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers, with thunderstorms also possible after 2pm. High near 85. West wind 3 to 8 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Mostly sunny, with a high near 81.
Saturday Night
Partly cloudy, with a low around 60.
Sunday
Sunny, with a high near 80.
Sunday Night
Mostly clear, with a low around 61.
Labor Day
Mostly sunny, with a high near 81.
Monday Night
Partly cloudy, with a low around 63.
Tuesday
Mostly sunny, with a high near 82.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Carnegie PA
 40.4°N 80.08°W (Elev. 899 ft)
Last Update:
2:21 pm EDT Sep 2, 2026
Forecast Valid:
3pm EDT Sep 2, 2026-6pm EDT Sep 8, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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