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.

Partly Cloudy

68°F

20°C

Humidity 68%
Wind Speed S 3 mph
Barometer 30.21 in (1021.3 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 16 Aug 4:54 am EDT
Extended Forecast for

4 Miles W Alum Bank PA

  • Today

    Today: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 81. Light south wind. Chance of precipitation is 20%.

    High: 81 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 65. Light south wind.

    Low: 65 °F

    Mostly Clear

  • Sunday

    Sunday: A slight chance of showers, then a chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 80. West wind 5 to 8 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 80 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 64. Northwest wind around 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Monday

    Monday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 76. East wind around 6 mph. Chance of precipitation is 20%.

    High: 76 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 74. Chance of precipitation is 50%.

    High: 74 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.

    Low: 63 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 72. Chance of precipitation is 60%.

    High: 72 °F

    Showers
    Likely

Detailed Forecast

Today
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 81. Light south wind. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 65. Light south wind.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 80. West wind 5 to 8 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 64. Northwest wind around 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 76. East wind around 6 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 64.
Tuesday
A chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 74. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 72. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.
Thursday
A chance of showers. Partly sunny, with a high near 71. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Partly cloudy, with a low around 58. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 73.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Alum Bank PA
 40.21°N 78.71°W (Elev. 2595 ft)
Last Update:
2:03 am EDT Aug 16, 2025
Forecast Valid:
5am EDT Aug 16, 2025-6pm EDT Aug 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