Plains Airport Weather Forecast

    • 46
    • 80

    Mostly Sunny

    • 50
    • 88

    Chance Rain Showers

    • 45
    • 71

    Rain Likely

    • 50
    • 74

    Chance Rain Showers

    • 52
    • 82

    Chance Rain

    • 50
    • 78

    Rain Showers Likely

    • 45
    • 71

    Chance Rain

Today 24 May Lower Clark Fork Region

Mostly sunny. Highs in the 70s. West Winds to 15 Mph in the afternoon.

Tonight 24 May Lower Clark Fork Region

Mostly clear. Lows in the 40s. West Winds to 15 Mph in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Plains Airport Temperature Statistics

May Temperature

Mullan Pass, Mullan Pass Vor (35.4 miles)

  • Lowest 17 May, 2026

    26.1 °F

  • Average May

    44 °F

  • Highest 12 May, 2026

    68 °F

Climate (2021–Present)

Mullan Pass, Mullan Pass Vor (35.4 miles)

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  • Average Low 2021–2026

    34.1 °F

  • Average 2021–2026

    40 °F

  • Average High 2021–2026

    46.4 °F
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