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.

Light Rain

26°C

79°F

Humidity 67%
Wind Speed S 11 km/h
Barometer 1016.8 mb (30.08 in)
Dewpoint 19°C (67°F)
Visibility 16 km
Heat Index27°C (81°F)
Last update 12 Jul 8:54 pm EDT
Extended Forecast for

Johnstown PA

  • Tonight

    Tonight: A chance of showers and thunderstorms between 3am and 5am, then a slight chance of showers. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 21. South wind 3 to 8 km/h. Chance of precipitation is 30%. New rainfall amounts of less than 1 mm, except higher amounts possible in thunderstorms.

    Low: 21 °C

    Slight Chance
    T-storms then
    Chance
    Showers and
    Patchy Fog

  • Sunday

    Sunday: Showers and thunderstorms, mainly after 2pm. Patchy fog between 7am and 8am. High near 30. Calm wind becoming southwest 5 to 10 km/h in the afternoon. Chance of precipitation is 80%. New rainfall amounts between 5 and 7.5 mm possible.

    High: 30 °C

    Chance
    T-storms and
    Patchy Fog
    then T-storms

  • Sunday Night

    Sunday Night: Showers and thunderstorms, mainly before 8pm. Low around 19. Calm wind. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 cm possible.

    Low: 19 °C

    T-storms then
    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 29. West wind 3 to 8 km/h.

    High: 29 °C

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 18. Calm wind.

    Low: 18 °C

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 31.

    High: 31 °C

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 20.

    Low: 20 °C

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 31. Chance of precipitation is 40%.

    High: 31 °C

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 21. Chance of precipitation is 40%.

    Low: 21 °C

    Chance
    T-storms

Detailed Forecast

Tonight
A chance of showers and thunderstorms between 3am and 5am, then a slight chance of showers. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 21. South wind 3 to 8 km/h. Chance of precipitation is 30%. New rainfall amounts of less than 1 mm, except higher amounts possible in thunderstorms.
Sunday
Showers and thunderstorms, mainly after 2pm. Patchy fog between 7am and 8am. High near 30. Calm wind becoming southwest 5 to 10 km/h in the afternoon. Chance of precipitation is 80%. New rainfall amounts between 5 and 7.5 mm possible.
Sunday Night
Showers and thunderstorms, mainly before 8pm. Low around 19. Calm wind. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 cm possible.
Monday
Mostly sunny, with a high near 29. West wind 3 to 8 km/h.
Monday Night
Mostly clear, with a low around 18. Calm wind.
Tuesday
Sunny, with a high near 31.
Tuesday Night
Partly cloudy, with a low around 20.
Wednesday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 31. Chance of precipitation is 40%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 21. Chance of precipitation is 40%.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 30. Chance of precipitation is 70%.
Thursday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 21. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 29. Chance of precipitation is 60%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 19. Chance of precipitation is 60%.
Saturday
A chance of showers. Partly sunny, with a high near 28. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Johnstown PA
 40.32°N 78.93°W (Elev. 1670 m)
Last Update:
7:38 pm EDT Jul 12, 2025
Forecast Valid:
9pm EDT Jul 12, 2025-6pm EDT Jul 19, 2025
 
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