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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Overcast

68°F

20°C

Humidity 84%
Wind Speed E 5 mph
Barometer 30.01 in (1016.1 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 19 Sep 7:53 pm EDT
Extended Forecast for

Pittsburgh PA

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Low around 67. South wind 3 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Slight Chance
    T-storms then
    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm, mainly before 5pm, then a chance of showers and thunderstorms after 5pm. High near 78. Southwest wind 7 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 78 °F

    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 3am, then a slight chance of showers between 3am and 4am. Mostly cloudy, with a low around 57. North wind around 8 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 57 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A chance of showers, mainly between 7am and 2pm. Mostly cloudy, with a high near 70. Northeast wind 9 to 11 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 70 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Showers likely, mainly after 2am. Cloudy, with a low around 57. East wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 57 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely. Cloudy, with a high near 67. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    High: 67 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely. Cloudy, with a low around 55. Chance of precipitation is 70%.

    Low: 55 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers. Mostly cloudy, with a high near 64. Chance of precipitation is 50%.

    High: 64 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 2am. Cloudy, with a low around 53. Chance of precipitation is 60%.

    Low: 53 °F

    Showers
    Likely

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Low around 67. South wind 3 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers and possibly a thunderstorm, mainly before 5pm, then a chance of showers and thunderstorms after 5pm. High near 78. Southwest wind 7 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A chance of showers and thunderstorms before 3am, then a slight chance of showers between 3am and 4am. Mostly cloudy, with a low around 57. North wind around 8 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A chance of showers, mainly between 7am and 2pm. Mostly cloudy, with a high near 70. Northeast wind 9 to 11 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Showers likely, mainly after 2am. Cloudy, with a low around 57. East wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
Showers likely. Cloudy, with a high near 67. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Showers likely. Cloudy, with a low around 55. Chance of precipitation is 70%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 64. Chance of precipitation is 50%.
Wednesday Night
Showers likely, mainly after 2am. Cloudy, with a low around 53. Chance of precipitation is 60%.
Thursday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.
Thursday Night
Mostly cloudy, with a low around 52.
Friday
Mostly sunny, with a high near 70.
Friday Night
Partly cloudy, with a low around 51.
Saturday
Mostly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Pittsburgh PA
 40.44°N 80.01°W (Elev. 850 ft)
Last Update:
6:41 pm EDT Sep 19, 2026
Forecast Valid:
8pm EDT Sep 19, 2026-6pm EDT Sep 26, 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