Thompson Falls Weather Forecast

    • 46
    • 87

    Mostly Sunny

    • 47
    • 88

    Mostly Sunny

    • 45
    • 86

    Partly Sunny

    • 47
    • 84

    Partly Sunny

    • 42
    • 73

    Slight Chance Rain

    • 45
    • 79

    Mostly Sunny

Today 17 Sep Lower Clark Fork Region

Mostly sunny. Patchy fog early in the morning. Highs in the upper 70s to mid 80s.

Tonight 17 Sep Lower Clark Fork Region

Mostly clear. Lows in the mid 40s to lower 50s.

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Thompson Falls Temperature Statistics

September Temperature

Mullan Pass, Mullan Pass Vor (18 miles)

  • Lowest 14 September, 2025

    44.1 °F

  • Average September

    62.3 °F

  • Highest 2 September, 2025

    84 °F

Climate (2020–Present)

Mullan Pass, Mullan Pass Vor (18 miles)

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  • Average Low 2020–2025

    33.7 °F

  • Average 2020–2025

    39.7 °F

  • Average High 2020–2025

    46.1 °F
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