Mammoth Weather Forecast

    • 24
    • 44

    Mostly Cloudy

    • 22
    • 48

    Partly Sunny

    • 26
    • 51

    Mostly Sunny

    • 29
    • 55

    Mostly Sunny

    • 29
    • 56

    Mostly Sunny

    • 27
    • 56

    Mostly Sunny

    • 28
    • 55

    Sunny

Today 10 Jan Northeast Siskiyou and Northwest Modoc Counties

Mostly cloudy. Highs in the lower to mid 40s. East Winds around 5 Mph shifting to the southwest late this afternoon.

Tonight 10 Jan Northeast Siskiyou and Northwest Modoc Counties

Mostly cloudy. Lows in the mid 20s. South Winds around 5 Mph shifting to the southeast after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mammoth Temperature Statistics

January Temperature

Klamath Falls International Airport (34.2 miles)

  • Lowest 8 January, 2026

    19.9 °F

  • Average January

    36.8 °F

  • Highest 1 January, 2026

    46.9 °F

Climate (2021–Present)

Klamath Falls International Airport (34.2 miles)

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  • Average Low 2021–2026

    34 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    63.2 °F
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