Plains Airport Weather Forecast

    • 25
    • 39

    Chance Snow

    • 30
    • 39

    Rain/Snow

    • 26
    • 42

    Chance Rain/Snow

    • 29
    • 41

    Chance Rain/Snow

    • 28
    • 43

    Chance Rain/Snow

    • 29
    • 41

    Chance Rain/Snow

Today 20 Dec Lower Clark Fork Region

Mostly cloudy with a 50 percent chance of snow. Highs in the 30s. Southwest Winds to 15 Mph.

Tonight 20 Dec Lower Clark Fork Region

Mostly cloudy with a 20 percent chance of snow in the Evening, then partly cloudy after midnight. Lows in the 20s.

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Plains Airport Temperature Statistics

December Temperature

Mullan Pass, Mullan Pass Vor (35.4 miles)

  • Lowest 1 December, 2025

    15.1 °F

  • Average December

    30.1 °F

  • Highest 14 December, 2025

    43 °F

Climate (2020–Present)

Mullan Pass, Mullan Pass Vor (35.4 miles)

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  • Average Low 2020–2025

    33.8 °F

  • Average 2020–2025

    39.8 °F

  • Average High 2020–2025

    46.2 °F
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