Plains Weather Forecast

    • 36
    • 74

    Increasing Clouds

    • 41
    • 71

    Rain

    • 29
    • 57

    Rain Likely

    • 28
    • 58

    Mostly Cloudy

    • 25
    • 55

    Slight Chance Snow

    • 26
    • 53

    Slight Chance Rain/Snow

Today 21 Oct Lower Clark Fork Region

Mostly cloudy with a 20 percent chance of rain and snow. Highs in the mid 40s to lower 50s.

Tonight 21 Oct Lower Clark Fork Region

Mostly clear. Lows in the upper 30s to mid 40s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Plains Temperature Statistics

October Temperature

Mullan Pass, Mullan Pass Vor (36.7 miles)

  • Lowest 11 October, 2026

    24.1 °F

  • Average October

    45.1 °F

  • Highest 4 October, 2026

    69.1 °F

Climate (2021–2026)

Mullan Pass, Mullan Pass Vor (36.7 miles)

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  • Average Low 2021–2026

    33.8 °F

  • Average 2021–2026

    39.8 °F

  • Average High 2021–2026

    46.1 °F
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