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.

Mostly Cloudy

66°F

19°C

Humidity 96%
Wind Speed SW 6 mph
Barometer 29.80 in (1007.7 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 2 Aug 11:54 pm EDT
Extended Forecast for

Johnstown PA

Flood Watch August 3, 12:42am until August 3, 02:00am
Click here for hazard details and duration
...
  •  
    Flood Watch August 3, 12:42am until August 3, 02:00am

    NOW until 2:00am Mon

    Flood Watch

  • Overnight

    Low: 66 °F

    Chance
    Showers

  • Monday

    Monday: A slight chance of showers before 1pm, then a slight chance of showers after 3pm. Mostly cloudy, with a high near 78. Calm wind becoming northwest 5 to 7 mph in the morning. Chance of precipitation is 20%.

    High: 78 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: Patchy fog between 2am and 3am. Otherwise, partly cloudy, with a low around 61. Calm wind.

    Low: 61 °F

    Partly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 82 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 63. Light southeast wind.

    Low: 63 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Partly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms between 8am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 70%.

    High: 84 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Overnight
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
A slight chance of showers before 1pm, then a slight chance of showers after 3pm. Mostly cloudy, with a high near 78. Calm wind becoming northwest 5 to 7 mph in the morning. Chance of precipitation is 20%.
Monday Night
Patchy fog between 2am and 3am. Otherwise, partly cloudy, with a low around 61. Calm wind.
Tuesday
Mostly sunny, with a high near 82. Calm wind becoming southeast around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 63. Light southeast wind.
Wednesday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms between 8am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 70%.
Thursday Night
Showers likely, mainly before 8pm. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Friday
Showers and possibly a thunderstorm, mainly after 2pm. High near 83. Chance of precipitation is 80%.
Friday Night
Showers and possibly a thunderstorm. Low around 67. Chance of precipitation is 80%.
Saturday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 83. Chance of precipitation is 60%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 40%.
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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:
8:11 pm EDT Aug 2, 2026
Forecast Valid:
12am EDT Aug 3, 2026-6pm EDT Aug 9, 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