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.

Fair

20°F

-7°C

Humidity 34%
Wind Speed W 13 mph
Barometer 30.02 in (1020.7 mb)
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Wind Chill7°F (-14°C)
Last update 15 Dec 10:54 pm EST
Extended Forecast for

South Fork PA

  • Tonight

    Tonight: Mostly clear, with a low around 10. West wind 3 to 5 mph.

    Low: 10 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 33. West wind 5 to 7 mph.

    High: 33 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a temperature rising to around 34 by 4am. Southwest wind 6 to 11 mph, with gusts as high as 26 mph.

    Low: 26 °F⇑

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 39. West wind 11 to 14 mph, with gusts as high as 29 mph.

    High: 39 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 25. West wind 5 to 7 mph becoming calm.

    Low: 25 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers after 1pm. Partly sunny, with a high near 46. Chance of precipitation is 30%.

    High: 46 °F

    Partly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Rain showers before 1am, then rain and snow showers likely. Low around 25. Breezy. Chance of precipitation is 100%.

    Low: 25 °F

    Showers then
    Rain/Snow and
    Breezy

  • Friday

    Friday: Mostly cloudy, with a high near 33. Breezy.

    High: 33 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 18.

    Low: 18 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 10. West wind 3 to 5 mph.
Tuesday
Mostly sunny, with a high near 33. West wind 5 to 7 mph.
Tuesday Night
Partly cloudy, with a temperature rising to around 34 by 4am. Southwest wind 6 to 11 mph, with gusts as high as 26 mph.
Wednesday
Mostly cloudy, with a high near 39. West wind 11 to 14 mph, with gusts as high as 29 mph.
Wednesday Night
Mostly cloudy, with a low around 25. West wind 5 to 7 mph becoming calm.
Thursday
A chance of showers after 1pm. Partly sunny, with a high near 46. Chance of precipitation is 30%.
Thursday Night
Rain showers before 1am, then rain and snow showers likely. Low around 25. Breezy. Chance of precipitation is 100%.
Friday
Mostly cloudy, with a high near 33. Breezy.
Friday Night
Mostly cloudy, with a low around 18.
Saturday
Mostly cloudy, with a high near 40.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 31. Chance of precipitation is 30%.
Sunday
Partly sunny, with a high near 39.
Sunday Night
A chance of snow showers. Mostly cloudy, with a low around 25. Chance of precipitation is 30%.
Monday
A chance of rain and snow showers. Mostly cloudy, with a high near 37. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Fork PA
 40.37°N 78.8°W (Elev. 1572 ft)
Last Update:
11:15 pm EST Dec 15, 2025
Forecast Valid:
11pm EST Dec 15, 2025-6pm EST Dec 22, 2025
 
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