Johnstown Weather Forecast

    • 69
    • 95

    Chance Thunderstorms

    • 64
    • 83

    Rain Showers Likely

    • 64
    • 84

    Slight Chance Thunderstorms

    • 65
    • 88

    Slight Chance Thunderstorms

    • 67
    • 94

    Slight Chance Thunderstorms

    • 69
    • 95

    Slight Chance Thunderstorms

Today 22 Jul Brown

Mostly sunny. Highs in the mid 90s. South Winds 10 to 20 Mph. Highest heat index Readings 100 to 104 in the afternoon.

Tonight 22 Jul Brown

Partly cloudy. A slight chance of Showers and Thunderstorms in the Evening, then a chance of Showers and Thunderstorms after midnight. Lows in the upper 60s. South Winds 10 to 15 Mph. Chance of precipitation 30 percent. Highest heat index Readings 100 to 102 in the evening.

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Johnstown Temperature Statistics

July Temperature

Ainsworth Regional Airport (2.5 miles)

  • Lowest 17 July, 2025

    52.2 °F

  • Average July

    73.1 °F

  • Highest 14 July, 2025

    96.8 °F

Climate (2020–Present)

Ainsworth Regional Airport (2.5 miles)

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  • Average Low 2020–2025

    37.4 °F

  • Average 2020–2025

    49.2 °F

  • Average High 2020–2025

    61.7 °F
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