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.

Light Rain Fog/Mist

63°F

17°C

Humidity 97%
Wind Speed NW 13 mph
Barometer 29.88 in (1010.5 mb)
Dewpoint 62°F (17°C)
Visibility 2.50 mi
Last update 3 Aug 7:54 am EDT
Extended Forecast for

South Fork PA

  • Today

    Today: Cloudy, then gradually becoming mostly sunny, with a high near 77. Northwest wind 6 to 9 mph.

    High: 77 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Patchy fog after 1am. Otherwise, mostly clear, with a low around 56. Northwest wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Areas of fog before 9am. Otherwise, sunny, with a high near 81. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 81 °F

    Areas Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 63. Light southeast wind.

    Low: 63 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 82. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Partly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 66. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm, mainly after 2pm. High near 83. Chance of precipitation is 80%.

    High: 83 °F

    Chance
    Showers then
    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 8pm. Low around 66. Chance of precipitation is 80%.

    Low: 66 °F

    Showers then
    Partly Cloudy

  • Friday

    Friday: Showers likely and possibly a thunderstorm, mainly after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 60%.

    High: 82 °F

    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

Today
Cloudy, then gradually becoming mostly sunny, with a high near 77. Northwest wind 6 to 9 mph.
Tonight
Patchy fog after 1am. Otherwise, mostly clear, with a low around 56. Northwest wind around 5 mph becoming calm in the evening.
Tuesday
Areas of fog before 9am. Otherwise, sunny, with a high near 81. Calm wind becoming southeast around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 63. Light southeast wind.
Wednesday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 82. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 66. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and possibly a thunderstorm, mainly after 2pm. High near 83. Chance of precipitation is 80%.
Thursday Night
Showers and possibly a thunderstorm before 8pm. Low around 66. Chance of precipitation is 80%.
Friday
Showers likely and possibly a thunderstorm, mainly after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 60%.
Friday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 81. Chance of precipitation is 50%.
Saturday Night
A chance of thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Fork PA
 40.37°N 78.77°W (Elev. 1542 ft)
Last Update:
8:06 am EDT Aug 3, 2026
Forecast Valid:
8am 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