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

Pittsburgh/Butler Regional Airport (KBTP)

Lat: 40.78°NLon: 79.96°WElev: 1248ft.

Fair

64°F

18°C

Humidity 45%
Wind Speed NW 8 mph
Barometer 30.07 in (1018.7 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 15 May 1:56 pm EDT
Extended Forecast for

Portersville PA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 67. Calm wind becoming west around 6 mph.

    High: 67 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 48. Calm wind becoming south around 5 mph after midnight.

    Low: 48 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 3pm. Increasing clouds, with a high near 79. Southwest wind 7 to 13 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely before 1am, then a chance of showers. Mostly cloudy, with a low around 60. Southwest wind 5 to 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 60 °F

    Showers
    Likely then
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 83. Calm wind becoming southwest 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: 83 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

  • Monday

    Monday: Sunny and hot, with a high near 92.

    High: 92 °F

    Hot

  • Monday Night

    Monday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Chance of precipitation is 40%.

    High: 88 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
Partly sunny, with a high near 67. Calm wind becoming west around 6 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 48. Calm wind becoming south around 5 mph after midnight.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after 3pm. Increasing clouds, with a high near 79. Southwest wind 7 to 13 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and thunderstorms likely before 1am, then a chance of showers. Mostly cloudy, with a low around 60. Southwest wind 5 to 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 83. Calm wind becoming southwest 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.
Sunday Night
Partly cloudy, with a low around 63.
Monday
Sunny and hot, with a high near 92.
Monday Night
Partly cloudy, with a low around 68.
Tuesday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Chance of precipitation is 40%.
Tuesday Night
A chance of showers and thunderstorms, then showers likely after 8pm. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Wednesday
Showers likely. Mostly cloudy, with a high near 75. Chance of precipitation is 70%.
Wednesday Night
Mostly cloudy, with a low around 51.
Thursday
Partly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portersville PA
 40.91°N 80.15°W (Elev. 1309 ft)
Last Update:
2:21 pm EDT May 15, 2026
Forecast Valid:
2pm EDT May 15, 2026-6pm EDT May 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation