Jackson Lake Weather Forecast

    • 42
    • 67

    Mostly Sunny

    • 44
    • 78

    Mostly Sunny

    • 50
    • 80

    Mostly Sunny

    • 51
    • 85

    Partly Sunny

    • 52
    • 81

    Mostly Cloudy

    • 49
    • 76

    Chance Thunderstorms

    • 46
    • 75

    Chance Thunderstorms

Today 16 Jul Meagher County Valleys

Warmer. Mostly cloudy early in the morning then becoming partly cloudy. A 20 percent chance of rain Showers. Highs 60 to 70. East Winds 5 to 15 Mph.

Tonight 16 Jul Meagher County Valleys

Mostly clear. Patchy fog after midnight. Lows 40 to 45. East Winds 5 to 15 Mph.

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Jackson Lake Temperature Statistics

July Temperature

Helena Regional Airport (43.5 miles)

  • Lowest 5 July, 2025

    49.6 °F

  • Average July

    73.4 °F

  • Highest 8 July, 2025

    97.6 °F

Climate (2020–Present)

Helena Regional Airport (43.5 miles)

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  • Average Low 2020–2025

    36.1 °F

  • Average 2020–2025

    47.5 °F

  • Average High 2020–2025

    59.4 °F
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