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.

Fair

78°F

26°C

Humidity 67%
Wind Speed Vrbl 3 mph
Barometer 30.16 in (1020.7 mb)
Dewpoint 66°F (19°C)
Visibility 8.00 mi
Heat Index80°F (27°C)
Last update 16 Aug 9:53 am EDT
Extended Forecast for

Irwin PA

  • Today

    Today: Sunny and hot, with a high near 91. Calm wind.

    High: 91 °F

    Hot

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, mostly clear, with a low around 66. Calm wind.

    Low: 66 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 11am. Partly sunny, with a high near 88. West wind 3 to 7 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of thunderstorms before 8pm. Partly cloudy, with a low around 67. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 86. Northeast wind 3 to 5 mph.

    High: 86 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 40%.

    High: 89 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 60%.

    High: 83 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny and hot, with a high near 91. Calm wind.
Tonight
Patchy fog after 3am. Otherwise, mostly clear, with a low around 66. Calm wind.
Sunday
A chance of showers, with thunderstorms also possible after 11am. Partly sunny, with a high near 88. West wind 3 to 7 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 67. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
Mostly sunny, with a high near 86. Northeast wind 3 to 5 mph.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 40%.
Tuesday Night
A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 61.
Friday
Mostly sunny, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Irwin PA
 40.32°N 79.68°W (Elev. 1099 ft)
Last Update:
7:05 am EDT Aug 16, 2025
Forecast Valid:
10am EDT Aug 16, 2025-6pm EDT Aug 22, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation