Johnstown Weather Forecast

    • 62
    • 82

    Chance Thunderstorms

    • 68
    • 90

    Mostly Sunny

    • 67
    • 88

    Partly Sunny

    • 49
    • 78

    Rain Showers

    • 49
    • 68

    Chance Rain Showers

    • 52
    • 66

    Chance Rain Showers

Today 17 May Cambria

Partly sunny. A chance of Showers and Thunderstorms this afternoon. Very warm with Highs in the lower 80s. West Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

Tonight 17 May Cambria

Partly cloudy with a chance of Showers and Thunderstorms in the Evening, then mostly clear after midnight. Lows in the lower 60s. Southwest Winds around 5 Mph. Chance of rain 30 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Johnstown Temperature Statistics

May Temperature

Johnstown - Cambria County Airport (4.3 miles)

  • Lowest 3 May, 2026

    29.6 °F

  • Average May

    49.6 °F

  • Highest 5 May, 2026

    72.6 °F

Climate (2021–Present)

Johnstown - Cambria County Airport (4.3 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    42.8 °F

  • Average 2021–2026

    50.6 °F

  • Average High 2021–2026

    58.7 °F
Get WillyWeather+ to remove ads