Mammoth Weather Forecast

    • 40
    • 70

    Patchy Smoke

    • 49
    • 60

    Rain Likely

    • 38
    • 62

    Chance Rain

    • 37
    • 64

    Mostly Sunny

    • 38
    • 68

    Mostly Sunny

    • 40
    • 71

    Partly Sunny

Today 1 Sep Northeast Siskiyou and Northwest Modoc Counties

Sunny in the Morning, then mostly cloudy with a chance of rain in the afternoon. Patchy smoke through the day. Highs around 70. South Winds 10 to 15 Mph shifting to the southwest 15 to 20 Mph with Gusts to around 35 Mph late in the afternoon.

Tonight 1 Sep Northeast Siskiyou and Northwest Modoc Counties

Mostly cloudy with a 30 percent chance of rain. Lows in the lower to mid 40s. Southwest Winds 10 to 20 Mph with Gusts to around 35 Mph decreasing to 5 to 10 Mph well after midnight.

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Mammoth Temperature Statistics

September Temperature

Klamath Falls International Airport (34.2 miles)

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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

    63.4 °F
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