Mount Helena Park Weather Forecast

    • 59
    • 90

    Mostly Cloudy

    • 57
    • 83

    Clearing Late

    • 61
    • 87

    Mostly Sunny

    • 62
    • 93

    Mostly Sunny

    • 60
    • 92

    Mostly Sunny

    • 55
    • 85

    Mostly Sunny

    • 53
    • 80

    Mostly Sunny

Today 16 Aug Upper Blackfoot and MacDonald Pass

Sunny. Haze and Areas of smoke through the day. A 20 percent chance of Thunderstorms in the afternoon. Highs 75 to 85. Southwest Winds 5 to 15 Mph.

Tonight 16 Aug Upper Blackfoot and MacDonald Pass

Mostly cloudy. A 30 percent chance of Thunderstorms in the evening. Haze through the night. Areas of smoke after midnight. Lows 50 to 55. West Winds up to 10 Mph.

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Mount Helena Park Temperature Statistics

August Temperature

Helena Regional Airport (3.1 miles)

  • Lowest 7 August, 2025

    49.6 °F

  • Average August

    69.7 °F

  • Highest 12 August, 2025

    95.6 °F

Climate (2020–Present)

Helena Regional Airport (3.1 miles)

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  • Average Low 2020–2025

    36 °F

  • Average 2020–2025

    47.5 °F

  • Average High 2020–2025

    59.4 °F
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