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.

Partly Cloudy

65°F

18°C

Humidity 56%
Wind Speed W 5 mph
Barometer 29.93 in (1013.2 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 20 Jun 12:53 am EDT
Extended Forecast for

Irwin PA

  • Overnight

    Overnight: Partly cloudy, with a low around 55. Southwest wind around 6 mph.

    Low: 55 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 76. West wind 7 to 14 mph. Chance of precipitation is 20%.

    High: 76 °F

    Sunny then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 56. West wind 5 to 7 mph becoming light and variable.

    Low: 56 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 79. West wind 5 to 8 mph.

    High: 79 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers, then showers and possibly a thunderstorm after 2am. Low around 60. Calm wind becoming east 5 to 9 mph after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 60 °F

    Chance
    Showers then
    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    High: 77 °F

    Showers

  • Monday Night

    Monday Night: A chance of showers before 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 40%.

    Low: 57 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 55. Southwest wind around 6 mph.
Saturday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 76. West wind 7 to 14 mph. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 56. West wind 5 to 7 mph becoming light and variable.
Sunday
Mostly sunny, with a high near 79. West wind 5 to 8 mph.
Sunday Night
A chance of showers, then showers and possibly a thunderstorm after 2am. Low around 60. Calm wind becoming east 5 to 9 mph after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Monday Night
A chance of showers before 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 40%.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Partly cloudy, with a low around 58.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 80. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 50%.
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ABOUT THIS FORECAST

 
Point Forecast:
Irwin PA
 40.32°N 79.68°W (Elev. 1099 ft)
Last Update:
12:41 am EDT Jun 20, 2026
Forecast Valid:
1am EDT Jun 20, 2026-6pm EDT Jun 26, 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