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.

Overcast

67°F

19°C

Humidity 97%
Wind Speed NW 6 mph
Barometer 29.78 in (1007.8 mb)
Dewpoint 66°F (19°C)
Visibility 8.00 mi
Last update 3 Aug 2:53 am EDT
Extended Forecast for

Grindstone PA

  • Overnight

    Overnight: Scattered showers, mainly before 5am. Mostly cloudy, with a low around 67. Calm wind becoming west around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 67 °F

    Scattered
    Showers

  • Monday

    Monday: Cloudy through mid morning, then gradual clearing, with a high near 79. North wind 5 to 7 mph.

    High: 79 °F

    Gradual
    Clearing

  • Monday Night

    Monday Night: Patchy fog after midnight. Otherwise, mostly clear, with a low around 57. Light north wind.

    Low: 57 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Areas of fog before 10am. Otherwise, mostly sunny, with a high near 84. Light northeast wind.

    High: 84 °F

    Areas Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 65. Light and variable wind.

    Low: 65 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Scattered showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. 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 before 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.

    Low: 68 °F

    Scattered
    T-storms

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm, mainly after 2pm. Mostly cloudy, with a high near 84. Chance of precipitation is 70%.

    High: 84 °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

Detailed Forecast

Overnight
Scattered showers, mainly before 5am. Mostly cloudy, with a low around 67. Calm wind becoming west around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Cloudy through mid morning, then gradual clearing, with a high near 79. North wind 5 to 7 mph.
Monday Night
Patchy fog after midnight. Otherwise, mostly clear, with a low around 57. Light north wind.
Tuesday
Areas of fog before 10am. Otherwise, mostly sunny, with a high near 84. Light northeast wind.
Tuesday Night
Partly cloudy, with a low around 65. Light and variable wind.
Wednesday
Scattered showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. 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 before 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.
Thursday
Showers likely and possibly a thunderstorm, mainly after 2pm. Mostly cloudy, with a high near 84. 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 likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 70%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Saturday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 83. Chance of precipitation is 60%.
Saturday Night
Showers and thunderstorms likely. 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 84. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Grindstone PA
 40.02°N 79.84°W (Elev. 879 ft)
Last Update:
2:21 am EDT Aug 3, 2026
Forecast Valid:
2am EDT Aug 3, 2026-6pm EDT Aug 9, 2026
 
Forecast Discussion
 
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Additional Resources

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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