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

65°F

18°C

Humidity 76%
Wind Speed SW 7 mph
Barometer 30.30 in (1025.4 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 8 Sep 9:54 am EDT
Extended Forecast for

4 Miles W Alum Bank PA

  • Today

    Today: Partly sunny, with a high near 76. West wind around 6 mph.

    High: 76 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 61. Calm wind becoming southwest around 5 mph after midnight.

    Low: 61 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. Southwest wind 7 to 13 mph, with gusts as high as 24 mph.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm after 2am. Increasing clouds, with a low around 65. Southwest wind 10 to 16 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Mostly Cloudy
    then Showers
    Likely

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 8am, then showers likely between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 70. West wind 11 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 70 °F

    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Low around 56. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 56 °F

    Showers then
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 72. Chance of precipitation is 50%.

    High: 72 °F

    Partly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
Partly sunny, with a high near 76. West wind around 6 mph.
Tonight
Partly cloudy, with a low around 61. Calm wind becoming southwest around 5 mph after midnight.
Wednesday
Mostly sunny, with a high near 77. Southwest wind 7 to 13 mph, with gusts as high as 24 mph.
Wednesday Night
Showers likely and possibly a thunderstorm after 2am. Increasing clouds, with a low around 65. Southwest wind 10 to 16 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers likely and possibly a thunderstorm before 8am, then showers likely between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 70. West wind 11 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Low around 56. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Mostly sunny, with a high near 69.
Friday Night
Partly cloudy, with a low around 55.
Saturday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 72. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.
Sunday
A chance of showers. Partly sunny, with a high near 74. Chance of precipitation is 30%.
Sunday Night
A chance of showers. Partly cloudy, with a low around 59. Chance of precipitation is 30%.
Monday
A chance of showers. Partly sunny, with a high near 73. Chance of precipitation is 30%.
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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:
8:05 am EDT Sep 8, 2026
Forecast Valid:
10am EDT Sep 8, 2026-6pm EDT Sep 14, 2026
 
Forecast Discussion
 
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Additional Resources

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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