Harrison Lake Weather Forecast

    • 43
    • 60

    Becoming Sunny

    • 47
    • 66

    Mostly Sunny

    • 46
    • 69

    Chance Rain Showers

    • 38
    • 61

    Chance Thunderstorms

    • 30
    • 46

    Snow Showers Likely

    • 30
    • 39

    Snow Showers Likely

    • 35
    • 49

    Chance Snow Showers

Today 17 Jun Northwest Beaverhead County

Sunny. Highs 65 to 70. Northwest Winds up to 10 Mph.

Tonight 17 Jun Northwest Beaverhead County

Mostly clear. Lows 40 to 45. West Winds up to 10 Mph.

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Harrison Lake Temperature Statistics

June Temperature

Dillon, Dillon Airport (31.7 miles)

  • Lowest 3 June, 2025

    33.7 °F

  • Average June

    59.3 °F

  • Highest 9 June, 2025

    85.6 °F

Climate (2020–Present)

Dillon, Dillon Airport (31.7 miles)

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  • Average Low 2020–2025

    30.6 °F

  • Average 2020–2025

    42.8 °F

  • Average High 2020–2025

    55.7 °F
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