National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Johnstown - Cambria County Airport (KJST)

Lat: 40.31°NLon: 78.83°WElev: 2274ft.

Thunderstorm in Vicinity

74°F

23°C

Humidity 69%
Wind Speed SE 10 G 20 mph
Barometer 29.91 in (1011.7 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 22 Aug 4:54 pm EDT
Extended Forecast for

Cassandra PA

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms, mainly after 5pm. Some of the storms could be severe. Mostly sunny, with a high near 73. South wind around 7 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 73 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and thunderstorms before 2am, then a slight chance of showers between 2am and 5am. Some of the storms could be severe. Patchy fog after 2am. Low around 59. South wind 6 to 9 mph becoming southwest after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 59 °F

    Severe
    Thunderstorms
    then Chance
    T-storms and
    Patchy Fog

  • Sunday

    Sunday: A chance of showers and thunderstorms before 5pm, then a slight chance of showers. Mostly cloudy, then gradually becoming sunny, with a high near 68. West wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 68 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers, mainly before 4am. Partly cloudy, with a low around 54. West wind 7 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 54 °F

    Mostly Clear
    then Chance
    Showers

  • Monday

    Monday: A chance of showers, mainly before 7am. Mostly sunny, with a high near 66. West wind 9 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.

    High: 66 °F

    Chance
    Showers then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms, mainly after 5pm. Some of the storms could be severe. Mostly sunny, with a high near 73. South wind around 7 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms before 2am, then a slight chance of showers between 2am and 5am. Some of the storms could be severe. Patchy fog after 2am. Low around 59. South wind 6 to 9 mph becoming southwest after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
A chance of showers and thunderstorms before 5pm, then a slight chance of showers. Mostly cloudy, then gradually becoming sunny, with a high near 68. West wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A chance of showers, mainly before 4am. Partly cloudy, with a low around 54. West wind 7 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Monday
A chance of showers, mainly before 7am. Mostly sunny, with a high near 66. West wind 9 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.
Monday Night
Mostly clear, with a low around 53.
Tuesday
Mostly sunny, with a high near 71.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Mostly sunny, with a high near 75.
Wednesday Night
Mostly cloudy, with a low around 61.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 76. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 40%.
Friday
A chance of showers. Partly sunny, with a high near 75. Chance of precipitation is 40%.
Friday Night
A chance of showers. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Cassandra PA
 40.4°N 78.62°W (Elev. 2211 ft)
Last Update:
2:39 pm EDT Aug 22, 2026
Forecast Valid:
4pm EDT Aug 22, 2026-6pm EDT Aug 29, 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