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.

Overcast

43°F

6°C

Humidity 86%
Wind Speed W 12 mph
Barometer 29.92 in (1014.5 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 15 May 12:54 am EDT
Extended Forecast for

Johnstown PA

  • Overnight

    Overnight: Cloudy, with a low around 42. West wind around 6 mph.

    Low: 42 °F

    Cloudy

  • Friday

    Friday: Cloudy through mid morning, then gradual clearing, with a high near 66. Northwest wind 6 to 8 mph.

    High: 66 °F

    Gradual
    Clearing

  • Friday Night

    Friday Night: Cloudy during the early evening, then gradual clearing, with a low around 48. Calm wind.

    Low: 48 °F

    Gradual
    Clearing

  • Saturday

    Saturday: Mostly sunny, with a high near 82. Calm wind becoming southwest 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 60. West wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 60 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Overnight
Cloudy, with a low around 42. West wind around 6 mph.
Friday
Cloudy through mid morning, then gradual clearing, with a high near 66. Northwest wind 6 to 8 mph.
Friday Night
Cloudy during the early evening, then gradual clearing, with a low around 48. Calm wind.
Saturday
Mostly sunny, with a high near 82. Calm wind becoming southwest 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 60. West wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Mostly clear, with a low around 61.
Monday
Sunny, with a high near 90.
Monday Night
Mostly clear, with a low around 67.
Tuesday
Mostly sunny and hot, with a high near 92.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 85. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.
Thursday
A chance of showers. Partly sunny, with a high near 74. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Johnstown PA
 40.34°N 78.89°W (Elev. 1299 ft)
Last Update:
1:44 am EDT May 15, 2026
Forecast Valid:
1am EDT May 15, 2026-6pm EDT May 21, 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