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.

81°F

27°C

Humidity 74%
Wind Speed W 8 mph
Barometer 30.14 in (1018.8 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 2 Sep 1:54 pm EDT
Extended Forecast for

Johnstown PA

  • This Afternoon

    This Afternoon: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. West wind around 6 mph. Chance of precipitation is 20%.

    High: 86 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms between 7pm and 2am, then a slight chance of showers. Partly cloudy, with a low around 69. Light south wind. Chance of precipitation is 30%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 69 °F

    Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Some of the storms could be severe. Partly sunny, with a high near 86. Light and variable wind becoming west 5 to 8 mph in the morning. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Slight Chance
    Showers then
    Severe
    Thunderstorms

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Some of the storms could be severe. Mostly cloudy, with a low around 68. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Severe
    Thunderstorms
    then Chance
    Showers

  • Friday

    Friday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 82. Light west wind increasing to 5 to 9 mph in the morning. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 82 °F

    Chance
    Showers then
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 8pm, then a slight chance of showers between 8pm and 2am. Low around 61. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Showers then
    Slight Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

Detailed Forecast

This Afternoon
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. West wind around 6 mph. Chance of precipitation is 20%.
Tonight
A chance of showers and thunderstorms between 7pm and 2am, then a slight chance of showers. Partly cloudy, with a low around 69. Light south wind. Chance of precipitation is 30%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Some of the storms could be severe. Partly sunny, with a high near 86. Light and variable wind becoming west 5 to 8 mph in the morning. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Some of the storms could be severe. Mostly cloudy, with a low around 68. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 82. Light west wind increasing to 5 to 9 mph in the morning. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers and possibly a thunderstorm before 8pm, then a slight chance of showers between 8pm and 2am. Low around 61. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Mostly sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 54.
Sunday
Sunny, with a high near 76.
Sunday Night
Partly cloudy, with a low around 54.
Labor Day
Mostly sunny, with a high near 78.
Monday Night
Mostly cloudy, with a low around 58.
Tuesday
Partly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Johnstown PA
 40.32°N 78.93°W (Elev. 1670 ft)
Last Update:
12:56 pm EDT Sep 2, 2026
Forecast Valid:
2pm EDT Sep 2, 2026-6pm EDT Sep 8, 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