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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Sunday could bring areas of flooding to parts of the upper Midwest, central Great Lakes, southern New England and Virginia/North Carolina tidewater region. Read More >

Hazardous Weather Conditions

Current conditions at

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Fog/Mist

68°F

20°C

Humidity 100%
Wind Speed N 6 mph
Barometer 30.14 in (1020.4 mb)
Dewpoint 68°F (20°C)
Visibility 1.25 mi
Last update 18 Sep 3:53 am EDT
Extended Forecast for

Pittsburgh PA

  • Today

    Today: Cloudy, then gradually becoming mostly sunny, with a high near 78. Calm wind becoming north 5 to 7 mph in the morning.

    High: 78 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Partly cloudy, with a low around 58. Northeast wind around 6 mph.

    Low: 58 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 78. East wind around 6 mph.

    High: 78 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Showers likely, with thunderstorms also possible after 5am. Mostly cloudy, with a low around 65. East wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm before 8am, then showers between 8am and 11am, then showers and possibly a thunderstorm after 11am. High near 77. South wind 5 to 7 mph becoming west in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 77 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Cloudy, with a low around 61. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Chance
    Showers

  • Monday

    Monday: A chance of showers after 2pm. Mostly cloudy, with a high near 71. Chance of precipitation is 40%.

    High: 71 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Cloudy, with a low around 59. Chance of precipitation is 70%.

    Low: 59 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely. Cloudy, with a high near 68. Chance of precipitation is 70%.

    High: 68 °F

    Showers
    Likely

Detailed Forecast

Today
Cloudy, then gradually becoming mostly sunny, with a high near 78. Calm wind becoming north 5 to 7 mph in the morning.
Tonight
Partly cloudy, with a low around 58. Northeast wind around 6 mph.
Saturday
Partly sunny, with a high near 78. East wind around 6 mph.
Saturday Night
Showers likely, with thunderstorms also possible after 5am. Mostly cloudy, with a low around 65. East wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers likely and possibly a thunderstorm before 8am, then showers between 8am and 11am, then showers and possibly a thunderstorm after 11am. High near 77. South wind 5 to 7 mph becoming west in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A chance of showers and thunderstorms. Cloudy, with a low around 61. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
A chance of showers after 2pm. Mostly cloudy, with a high near 71. Chance of precipitation is 40%.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Cloudy, with a low around 59. Chance of precipitation is 70%.
Tuesday
Showers likely. Cloudy, with a high near 68. Chance of precipitation is 70%.
Tuesday Night
Showers likely. Cloudy, with a low around 56. Chance of precipitation is 70%.
Wednesday
Showers likely. Mostly cloudy, with a high near 67. Chance of precipitation is 60%.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.
Thursday
A chance of showers. Mostly cloudy, with a high near 69. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Pittsburgh PA
 40.46°N 79.98°W (Elev. 791 ft)
Last Update:
2:22 am EDT Sep 18, 2026
Forecast Valid:
4am EDT Sep 18, 2026-6pm EDT Sep 24, 2026
 
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