Mammoth Weather Forecast

    • 47
    • 85

    Sunny

    • 47
    • 87

    Sunny

    • 46
    • 87

    Sunny

    • 41
    • 82

    Mostly Sunny

    • 31
    • 65

    Mostly Sunny

    • 28
    • 58

    Mostly Sunny

Today 6 Oct Northeast Siskiyou and Northwest Modoc Counties

Sunny. Highs in the lower to mid 80s. Southeast Winds around 5 Mph shifting to the northeast this afternoon.

Tonight 6 Oct Northeast Siskiyou and Northwest Modoc Counties

Clear. Lows in the lower to mid 50s. North Winds around 5 Mph shifting to the southwest after midnight.

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Mammoth Temperature Statistics

October Temperature

Klamath Falls International Airport (34.2 miles)

  • Lowest 2 October, 2026

    37.7 °F

  • Average October

    60 °F

  • Highest 3 October, 2026

    82.9 °F

Climate (2021–2026)

Klamath Falls International Airport (34.2 miles)

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  • Average Low 2021–2026

    33.9 °F

  • Average 2021–2026

    48.6 °F

  • Average High 2021–2026

    63.3 °F
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