Lost Lake Weather Forecast

    • 38
    • 50

    Increasing Clouds

    • 42
    • 55

    Partly Sunny

    • 42
    • 54

    Breezy

    • 36
    • 56

    Rain/Snow Likely

    • 35
    • 44

    Rain/Snow Likely

    • 36
    • 48

    Slight Chance Rain/Snow

Today 22 May Lower Clark Fork Region

Mostly sunny until late afternoon then becoming mostly cloudy. Highs in the mid 60s to lower 70s.

Tonight 22 May Lower Clark Fork Region

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

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lost Lake Temperature Statistics

May Temperature

Mullan Pass, Mullan Pass Vor (34.8 miles)

  • Lowest 17 May, 2026

    26.1 °F

  • Average May

    43.9 °F

  • Highest 12 May, 2026

    68 °F

Climate (2021–Present)

Mullan Pass, Mullan Pass Vor (34.8 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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