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.

Overcast

21°F

-6°C

Humidity 88%
Wind Speed Calm
Barometer 30.10 in (1023.0 mb)
Dewpoint 18°F (-8°C)
Visibility 8.00 mi
Last update 4 Jan 9:54 pm EST
Extended Forecast for

3 Miles SE Portage PA

  • Tonight

    Tonight: Mostly cloudy, with a low around 18. West wind 5 to 7 mph becoming light and variable.

    Low: 18 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 37. South wind around 8 mph becoming southwest in the afternoon.

    High: 37 °F

    Partly Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 30. West wind around 8 mph.

    Low: 30 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Rain likely, mainly after 1pm. Mostly cloudy, with a high near 44. South wind 7 to 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 44 °F

    Cloudy then
    Rain Likely

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 1am. Cloudy, with a low around 36. South wind 11 to 18 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Rain Likely

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 40.

    High: 40 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Rain likely, mainly after 1am. Cloudy, with a low around 38. Chance of precipitation is 60%.

    Low: 38 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly cloudy, with a low around 18. West wind 5 to 7 mph becoming light and variable.
Monday
Partly sunny, with a high near 37. South wind around 8 mph becoming southwest in the afternoon.
Monday Night
Increasing clouds, with a low around 30. West wind around 8 mph.
Tuesday
Rain likely, mainly after 1pm. Mostly cloudy, with a high near 44. South wind 7 to 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Rain likely, mainly before 1am. Cloudy, with a low around 36. South wind 11 to 18 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Mostly cloudy, with a high near 40.
Wednesday Night
Mostly cloudy, with a low around 31.
Thursday
Partly sunny, with a high near 47.
Thursday Night
Rain likely, mainly after 1am. Cloudy, with a low around 38. Chance of precipitation is 60%.
Friday
Rain likely. Mostly cloudy, with a high near 47. Chance of precipitation is 70%.
Friday Night
Rain likely. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.
Saturday
A chance of rain. Mostly cloudy, with a high near 44. Chance of precipitation is 40%.
Saturday Night
A chance of rain and snow. Mostly cloudy, with a low around 24. Chance of precipitation is 30%.
Sunday
A chance of snow. Mostly cloudy, with a high near 28. Breezy. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Portage PA
 40.36°N 78.63°W (Elev. 2326 ft)
Last Update:
10:06 pm EST Jan 4, 2026
Forecast Valid:
10pm EST Jan 4, 2026-6pm EST Jan 11, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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