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

76°F

24°C

Humidity 77%
Wind Speed SW 5 mph
Barometer 30.12 in (1018.6 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 8 Jul 11:54 am EDT
Extended Forecast for

4 Miles W Alum Bank PA

  • This Afternoon

    This Afternoon: Scattered showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 73. Southeast wind around 6 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 73 °F

    Scattered
    Showers

  • Tonight

    Tonight: Isolated showers and thunderstorms before 10pm. Mostly cloudy, with a low around 64. South wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 20%.

    Low: 64 °F

    Isolated
    T-storms then
    Mostly Cloudy

  • Thursday

    Thursday: Scattered showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then scattered showers and thunderstorms after 4pm. Partly sunny, with a high near 76. West wind 5 to 7 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Scattered
    T-storms then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 64. West wind around 7 mph.

    Low: 64 °F

    Partly Cloudy

  • Friday

    Friday: Showers likely, then showers and possibly a thunderstorm after 11am. High near 73. West wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 73 °F

    Showers

  • Friday Night

    Friday Night: Showers and thunderstorms before 11pm, then a chance of showers. Low around 61. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Showers then
    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers after 2pm. Mostly sunny, with a high near 74. Chance of precipitation is 30%.

    High: 74 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

This Afternoon
Scattered showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 73. Southeast wind around 6 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Isolated showers and thunderstorms before 10pm. Mostly cloudy, with a low around 64. South wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 20%.
Thursday
Scattered showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then scattered showers and thunderstorms after 4pm. Partly sunny, with a high near 76. West wind 5 to 7 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Partly cloudy, with a low around 64. West wind around 7 mph.
Friday
Showers likely, then showers and possibly a thunderstorm after 11am. High near 73. West wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and thunderstorms before 11pm, then a chance of showers. Low around 61. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Partly sunny, with a high near 73.
Saturday Night
Partly cloudy, with a low around 59.
Sunday
A chance of showers after 2pm. Mostly sunny, with a high near 74. Chance of precipitation is 30%.
Sunday Night
A chance of showers before 8pm. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 75.
Monday Night
Mostly clear, with a low around 61.
Tuesday
Sunny, with a high near 77.
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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:
8:06 am EDT Jul 8, 2026
Forecast Valid:
12pm EDT Jul 8, 2026-6pm EDT Jul 14, 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