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.

A Few Clouds

69°F

21°C

Humidity 47%
Wind Speed NW 17 G 29 mph
Barometer 29.88 in (1010.9 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 19 Jun 2:54 pm EDT
Extended Forecast for

Twin Rocks PA

  • Tonight

    Tonight: Mostly clear, with a low around 54. West wind 6 to 13 mph, with gusts as high as 26 mph.

    Low: 54 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 71. West wind 8 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 71 °F

    Sunny then
    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, mainly before 10pm. Patchy fog before 2am, then patchy fog after 3am. Otherwise, partly cloudy, with a low around 55. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 55 °F

    Chance
    Showers then
    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 75. West wind 5 to 8 mph.

    High: 75 °F

    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Showers, with thunderstorms also possible after 5am. Low around 59. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 59 °F

    Chance
    Showers then
    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm before 8am, then showers between 8am and 11am, then showers and possibly a thunderstorm after 11am. High near 73. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    High: 73 °F

    Showers

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm before 8pm, then showers likely between 8pm and 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.

    Low: 57 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 54. West wind 6 to 13 mph, with gusts as high as 26 mph.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 71. West wind 8 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of showers and thunderstorms, mainly before 10pm. Patchy fog before 2am, then patchy fog after 3am. Otherwise, partly cloudy, with a low around 55. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 75. West wind 5 to 8 mph.
Sunday Night
Showers, with thunderstorms also possible after 5am. Low around 59. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers and possibly a thunderstorm before 8am, then showers between 8am and 11am, then showers and possibly a thunderstorm after 11am. High near 73. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Monday Night
Showers likely and possibly a thunderstorm before 8pm, then showers likely between 8pm and 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.
Tuesday
Partly sunny, with a high near 73.
Tuesday Night
Partly cloudy, with a low around 54.
Wednesday
Mostly sunny, with a high near 74.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 57. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 75. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 57. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 74. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Twin Rocks PA
 40.51°N 78.87°W (Elev. 1831 ft)
Last Update:
2:21 pm EDT Jun 19, 2026
Forecast Valid:
3pm EDT Jun 19, 2026-6pm EDT Jun 26, 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