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.

Mostly Cloudy

67°F

19°C

Humidity 84%
Wind Speed NW 7 mph
Barometer 29.93 in (1013.1 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 3 Aug 9:53 am EDT
Extended Forecast for

Irwin PA

  • Today

    Today: Cloudy, then gradually becoming mostly sunny, with a high near 80. Northwest wind 8 to 10 mph.

    High: 80 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Patchy fog between 4am and 5am. Otherwise, mostly clear, with a low around 57. North wind around 6 mph becoming calm after midnight.

    Low: 57 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 9am. Otherwise, sunny, with a high near 84. Light east wind.

    High: 84 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 65. East wind around 5 mph becoming calm after midnight.

    Low: 65 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Scattered showers and thunderstorms after 2pm. Partly sunny, with a high near 86. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Mostly Sunny
    then
    Scattered
    T-storms

  • Wednesday Night

    Wednesday Night: Scattered showers and thunderstorms, mainly before 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Scattered
    T-storms

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm, mainly after 2pm. Mostly cloudy, with a high near 85. Chance of precipitation is 70%.

    High: 85 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.

    Low: 68 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 84. Chance of precipitation is 80%.

    High: 84 °F

    Chance
    Showers then
    Showers

Detailed Forecast

Today
Cloudy, then gradually becoming mostly sunny, with a high near 80. Northwest wind 8 to 10 mph.
Tonight
Patchy fog between 4am and 5am. Otherwise, mostly clear, with a low around 57. North wind around 6 mph becoming calm after midnight.
Tuesday
Patchy fog before 9am. Otherwise, sunny, with a high near 84. Light east wind.
Tuesday Night
Partly cloudy, with a low around 65. East wind around 5 mph becoming calm after midnight.
Wednesday
Scattered showers and thunderstorms after 2pm. Partly sunny, with a high near 86. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Scattered showers and thunderstorms, mainly before 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers likely and possibly a thunderstorm, mainly after 2pm. Mostly cloudy, with a high near 85. Chance of precipitation is 70%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.
Friday
A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 84. Chance of precipitation is 80%.
Friday Night
Showers and possibly a thunderstorm before 8pm, then showers likely. Low around 67. Chance of precipitation is 80%.
Saturday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Irwin PA
 40.32°N 79.68°W (Elev. 1099 ft)
Last Update:
6:51 am EDT Aug 3, 2026
Forecast Valid:
10am EDT Aug 3, 2026-6pm EDT Aug 9, 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