Deer Lake Weather Forecast

    • 15
    • 28

    Becoming Sunny

    • 12
    • 29

    Mostly Sunny

    • 11
    • 26

    Partly Sunny

    • 7
    • 21

    Mostly Sunny

    • 11
    • 21

    Mostly Sunny

    • 18
    • 25

    Chance Snow

Today 20 Jan Western Lemhi County

Mostly cloudy until late afternoon then clearing. Highs in the 30s.

Tonight 20 Jan Western Lemhi County

Mostly clear. Lows 12 to 19.

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Deer Lake Temperature Statistics

January Temperature

Salmon, Lemhi County Airport (30.4 miles)

  • Lowest 18 January, 2026

    12 °F

  • Average January

    27.3 °F

  • Highest 4 January, 2026

    48 °F

Climate (2021–Present)

Salmon, Lemhi County Airport (30.4 miles)

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  • Average Low 2021–2026

    32.7 °F

  • Average 2021–2026

    45.8 °F

  • Average High 2021–2026

    58.7 °F
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