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.

Fair

65°F

18°C

Humidity 84%
Wind Speed SW 8 mph
Barometer 30.10 in (1018.4 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 20 May 2:54 am EDT
Extended Forecast for

Portage PA

  • Overnight

    Overnight: A chance of showers, mainly before 5am. Mostly cloudy, with a low around 64. Southwest wind around 7 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 64 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2pm. High near 74. West wind 7 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Cloudy, with a low around 50. North wind 3 to 6 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 50 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely, mainly before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 63. Northeast wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 48. East wind around 6 mph.

    Low: 48 °F

    Mostly Cloudy

  • Friday

    Friday: Rain, mainly after 2pm. High near 57. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 57 °F

    Chance Rain
    then Rain

  • Friday Night

    Friday Night: Rain. Low around 47. Chance of precipitation is 90%.

    Low: 47 °F

    Rain

  • Saturday

    Saturday: Rain. High near 56. Chance of precipitation is 100%.

    High: 56 °F

    Rain

  • Saturday Night

    Saturday Night: Showers, mainly before 2am. Low around 51. Chance of precipitation is 80%.

    Low: 51 °F

    Showers

Detailed Forecast

Overnight
A chance of showers, mainly before 5am. Mostly cloudy, with a low around 64. Southwest wind around 7 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2pm. High near 74. West wind 7 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms. Cloudy, with a low around 50. North wind 3 to 6 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers likely, mainly before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 63. Northeast wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Mostly cloudy, with a low around 48. East wind around 6 mph.
Friday
Rain, mainly after 2pm. High near 57. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Rain. Low around 47. Chance of precipitation is 90%.
Saturday
Rain. High near 56. Chance of precipitation is 100%.
Saturday Night
Showers, mainly before 2am. Low around 51. Chance of precipitation is 80%.
Sunday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.
Sunday Night
Showers likely. Mostly cloudy, with a low around 58. Chance of precipitation is 70%.
Memorial Day
Showers likely. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 40%.
Tuesday
A chance of showers. Mostly cloudy, with a high near 76. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portage PA
 40.39°N 78.68°W (Elev. 1621 ft)
Last Update:
2:51 am EDT May 20, 2026
Forecast Valid:
3am EDT May 20, 2026-6pm EDT May 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation