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

Johnstown - Cambria County Airport (KJST)

Lat: 40.31°NLon: 78.83°WElev: 2274ft.

Mostly Cloudy

75°F

24°C

Humidity 64%
Wind Speed Vrbl 3 mph
Barometer 30.06 in (1016.7 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 25 Jul 3:54 pm EDT
Extended Forecast for

South Fork PA

  • This Afternoon

    This Afternoon: A chance of showers, with thunderstorms also possible after 5pm. Partly sunny, with a high near 79. Southeast wind around 6 mph. Chance of precipitation is 30%.

    High: 79 °F

    Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 60. Light south wind. Chance of precipitation is 30%.

    Low: 60 °F

    Chance
    Showers and
    Patchy Fog
    then Patchy
    Fog

  • Sunday

    Sunday: Areas of fog before 10am. Otherwise, mostly sunny, with a high near 81. Calm wind becoming northwest 5 to 7 mph in the afternoon.

    High: 81 °F

    Areas Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 3am, then a slight chance of showers between 3am and 5am. Partly cloudy, with a low around 62. Calm wind. Chance of precipitation is 20%.

    Low: 62 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 81. Calm wind becoming west 5 to 8 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Showers and thunderstorms likely before 2am, then showers and possibly a thunderstorm between 2am and 5am, then showers after 5am. Low around 64. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Showers
    Likely then
    Showers

  • Tuesday

    Tuesday: Showers, with thunderstorms also possible after 11am. High near 79. Chance of precipitation is 90%.

    High: 79 °F

    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.

    Low: 61 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 76. Chance of precipitation is 50%.

    High: 76 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
A chance of showers, with thunderstorms also possible after 5pm. Partly sunny, with a high near 79. Southeast wind around 6 mph. Chance of precipitation is 30%.
Tonight
A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 60. Light south wind. Chance of precipitation is 30%.
Sunday
Areas of fog before 10am. Otherwise, mostly sunny, with a high near 81. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Sunday Night
A slight chance of showers and thunderstorms before 3am, then a slight chance of showers between 3am and 5am. Partly cloudy, with a low around 62. Calm wind. Chance of precipitation is 20%.
Monday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 81. Calm wind becoming west 5 to 8 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
Showers and thunderstorms likely before 2am, then showers and possibly a thunderstorm between 2am and 5am, then showers after 5am. Low around 64. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers, with thunderstorms also possible after 11am. High near 79. Chance of precipitation is 90%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
Wednesday
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 76. Chance of precipitation is 50%.
Wednesday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 58. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 80.
Friday Night
Partly cloudy, with a low around 61.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Fork PA
 40.35°N 78.78°W (Elev. 1683 ft)
Last Update:
2:21 pm EDT Jul 25, 2026
Forecast Valid:
4pm EDT Jul 25, 2026-6pm EDT Aug 1, 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