Highup Lake Weather Forecast

    • 35
    • 43

    Rain Showers Likely

    • 37
    • 52

    Decreasing Clouds

    • 40
    • 56

    Mostly Sunny

    • 41
    • 57

    Partly Sunny

    • 41
    • 57

    Partly Sunny

    • 42
    • 60

    Partly Sunny

    • 39
    • 59

    Partly Sunny

Today 19 Sep Northwest Beaverhead County

Partly sunny with a 20 percent chance of rain. Highs 55 to 65.

Tonight 19 Sep Northwest Beaverhead County

Mostly cloudy with a 50 percent chance of rain early in the Evening, then mostly cloudy in the late evening and overnight. Patchy fog after midnight. Lows 33 to 39. North Winds up to 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Highup Lake Temperature Statistics

September Temperature

Salmon, Lemhi County Airport (14.3 miles)

  • Lowest 15 September, 2026

    35.1 °F

  • Average September

    58 °F

  • Highest 10 September, 2026

    82.9 °F

Climate (2021–2026)

Salmon, Lemhi County Airport (14.3 miles)

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  • Average Low 2021–2026

    33.1 °F

  • Average 2021–2026

    46 °F

  • Average High 2021–2026

    59.1 °F
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