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.

Fog/Mist

49°F

9°C

Humidity 100%
Wind Speed SE 3 mph
Barometer 30.12 in (1020.9 mb)
Dewpoint 49°F (9°C)
Visibility 5.00 mi
Last update 4 Mar 9:54 pm EST
Extended Forecast for

3 Miles SE Portage PA

  • Tonight

    Tonight: Showers, with thunderstorms also possible after 4am. Areas of dense fog. Low around 43. South wind around 6 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 43 °F

    Showers and
    Areas Dense
    Fog

  • Thursday

    Thursday: Rain and thunderstorms before 1pm, then rain between 1pm and 4pm, then showers and possibly a thunderstorm after 4pm. Areas of fog before 10am. High near 55. South wind around 7 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 55 °F

    Showers and
    Areas Fog

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 7pm, then rain and possibly a thunderstorm between 7pm and 1am, then rain likely after 1am. Low around 49. South wind around 9 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 49 °F

    Showers

  • Friday

    Friday: A chance of showers. Mostly cloudy, with a high near 58. Southwest wind 8 to 10 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 58 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers, mainly before 1am. Mostly cloudy, with a low around 50. South wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Chance
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 69. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 69 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 44. Chance of precipitation is 70%.

    Low: 44 °F

    Showers
    Likely

  • Sunday

    Sunday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers, with thunderstorms also possible after 4am. Areas of dense fog. Low around 43. South wind around 6 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Rain and thunderstorms before 1pm, then rain between 1pm and 4pm, then showers and possibly a thunderstorm after 4pm. Areas of fog before 10am. High near 55. South wind around 7 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Showers and possibly a thunderstorm before 7pm, then rain and possibly a thunderstorm between 7pm and 1am, then rain likely after 1am. Low around 49. South wind around 9 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday
A chance of showers. Mostly cloudy, with a high near 58. Southwest wind 8 to 10 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A chance of showers, mainly before 1am. Mostly cloudy, with a low around 50. South wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 69. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 44. Chance of precipitation is 70%.
Sunday
Mostly sunny, with a high near 55.
Sunday Night
Partly cloudy, with a low around 42.
Monday
Sunny, with a high near 61.
Monday Night
Partly cloudy, with a low around 51.
Tuesday
A chance of showers. Partly sunny, with a high near 69. Chance of precipitation is 40%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 57. Chance of precipitation is 40%.
Wednesday
Showers likely. Mostly cloudy, with a high near 70. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Portage PA
 40.36°N 78.63°W (Elev. 2326 ft)
Last Update:
9:52 pm EST Mar 4, 2026
Forecast Valid:
10pm EST Mar 4, 2026-6pm EDT Mar 11, 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