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 Fog/Mist

69°F

21°C

Humidity 96%
Wind Speed W 7 mph
Barometer 29.95 in (1012.7 mb)
Dewpoint 68°F (20°C)
Visibility 5.00 mi
Last update 16 Aug 11:54 pm EDT
Extended Forecast for

Portage PA

  • Overnight

    Overnight: A chance of showers and thunderstorms. Patchy fog after 1am. Otherwise, cloudy, with a low around 68. West wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Chance
    Showers and
    Patchy Fog

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 11am. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 77. West wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Chance
    Showers and
    Patchy Fog
    then Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 58. Northwest wind 3 to 7 mph.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 74. Light northwest wind increasing to 5 to 10 mph in the morning.

    High: 74 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59. Light west wind.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 76. Chance of precipitation is 30%.

    High: 76 °F

    Sunny then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.

    Low: 61 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers before 2pm. Mostly cloudy, with a high near 72. Chance of precipitation is 50%.

    High: 72 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

Detailed Forecast

Overnight
A chance of showers and thunderstorms. Patchy fog after 1am. Otherwise, cloudy, with a low around 68. West wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
A chance of showers, with thunderstorms also possible after 11am. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 77. West wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
Partly cloudy, with a low around 58. Northwest wind 3 to 7 mph.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 74. Light northwest wind increasing to 5 to 10 mph in the morning.
Tuesday Night
Mostly clear, with a low around 59. Light west wind.
Wednesday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 76. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
Thursday
A chance of showers before 2pm. Mostly cloudy, with a high near 72. Chance of precipitation is 50%.
Thursday Night
Partly cloudy, with a low around 55.
Friday
Mostly sunny, with a high near 72.
Friday Night
Partly cloudy, with a low around 57.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 73. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.
Sunday
A chance of showers. Partly sunny, with a high near 73. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portage PA
 40.38°N 78.66°W (Elev. 2096 ft)
Last Update:
10:11 pm EDT Aug 16, 2026
Forecast Valid:
12am EDT Aug 17, 2026-6pm EDT Aug 23, 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