Siah Lake Weather Forecast

    • 29
    • 43

    Decreasing Clouds

    • 28
    • 47

    Mostly Cloudy

    • 29
    • 44

    Partly Sunny

    • 30
    • 41

    Mostly Cloudy

    • 36
    • 46

    Rain Likely

    • 31
    • 45

    Snow

    • 25
    • 35

    Snow Likely

Today 14 Oct Southern Clearwater Mountains

Partly cloudy. Slight chance of rain and snow in the Morning, then Areas of rain in the afternoon. Widespread frost in the morning. Patchy fog early in the morning. Chance of precipitation 30 percent. Highs in the mid 40s to upper 50s.

Tonight 14 Oct Southern Clearwater Mountains

Mostly cloudy early in the evening then clearing. Patchy fog through the night. Patchy frost in the Evening, then widespread frost after midnight. Lows in the 20s to upper 30s.

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Siah Lake Temperature Statistics

October Temperature

Missoula, Missoula International Airport (31.7 miles)

  • Lowest 6 October, 2025

    27 °F

  • Average October

    50.2 °F

  • Highest 10 October, 2025

    81 °F

Climate (2020–Present)

Missoula, Missoula International Airport (31.7 miles)

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  • Average Low 2020–2025

    35.6 °F

  • Average 2020–2025

    47.1 °F

  • Average High 2020–2025

    59.3 °F
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