National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

Johnstown - Cambria County Airport (KJST)

Lat: 40.31°NLon: 78.83°WElev: 2274ft.

A Few Clouds

55°F

13°C

Humidity 49%
Wind Speed S 7 mph
Barometer 29.78 in (1008.0 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 22 Mar 5:54 am EDT
Extended Forecast for

Johnstown PA

  • Today

    Today: A slight chance of showers and thunderstorms between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could be severe. Increasing clouds, with a high near 76. South wind 5 to 11 mph becoming west in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Sunny then
    Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 1am, then showers likely. Some of the storms could be severe. Low around 38. Northwest wind 3 to 6 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 38 °F

    Severe
    Thunderstorms
    then Showers

  • Monday

    Monday: Cloudy, then gradually becoming mostly sunny, with a high near 46. Northwest wind 8 to 10 mph, with gusts as high as 22 mph.

    High: 46 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 25. Northwest wind 5 to 7 mph becoming calm after midnight.

    Low: 25 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 49. Light and variable wind.

    High: 49 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers. Mostly cloudy, with a low around 42. Chance of precipitation is 40%.

    Low: 42 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers. Mostly cloudy, with a high near 65. Chance of precipitation is 50%.

    High: 65 °F

    Chance
    Showers

Detailed Forecast

Today
A slight chance of showers and thunderstorms between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could be severe. Increasing clouds, with a high near 76. South wind 5 to 11 mph becoming west in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm before 1am, then showers likely. Some of the storms could be severe. Low around 38. Northwest wind 3 to 6 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
Cloudy, then gradually becoming mostly sunny, with a high near 46. Northwest wind 8 to 10 mph, with gusts as high as 22 mph.
Monday Night
Partly cloudy, with a low around 25. Northwest wind 5 to 7 mph becoming calm after midnight.
Tuesday
Sunny, with a high near 49. Light and variable wind.
Tuesday Night
Partly cloudy, with a low around 33.
Wednesday
Partly sunny, with a high near 57.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 42. Chance of precipitation is 40%.
Thursday
A chance of showers. Mostly cloudy, with a high near 65. Chance of precipitation is 50%.
Thursday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 37. Chance of precipitation is 70%.
Friday
A chance of showers. Partly sunny, with a high near 47. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Sunny, with a high near 46.
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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:
2:41 am EDT Mar 22, 2026
Forecast Valid:
6am EDT Mar 22, 2026-6pm EDT Mar 28, 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