Mammoth Weather Forecast

    • 29
    • 60

    Mostly Sunny

    • 32
    • 61

    Increasing Clouds

    • 34
    • 67

    Sunny

    • 39
    • 71

    Mostly Sunny

    • 30
    • 58

    Chance Rain

    • 32
    • 56

    Mostly Sunny

    • 34
    • 60

    Partly Sunny

Today 15 Oct Northeast Siskiyou and Northwest Modoc Counties

Sunny. Highs in the mid 50s to lower 60s. West Winds 10 to 15 Mph.

Tonight 15 Oct Northeast Siskiyou and Northwest Modoc Counties

Mostly clear. Lows in the lower to mid 30s. West Winds 5 to 10 Mph.

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Mammoth Temperature Statistics

October Temperature

Klamath Falls International Airport (34.2 miles)

  • Lowest 4 October, 2025

    30.9 °F

  • Average October

    48.6 °F

  • Highest 8 October, 2025

    71.1 °F

Climate (2020–Present)

Klamath Falls International Airport (34.2 miles)

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  • Average Low 2020–2025

    33.9 °F

  • Average 2020–2025

    48.5 °F

  • Average High 2020–2025

    63 °F
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