Mammoth Weather Forecast

    • 25
    • 53

    Mostly Sunny

    • 26
    • 56

    Mostly Sunny

    • 27
    • 55

    Mostly Sunny

    • 28
    • 55

    Sunny

    • 28
    • 55

    Mostly Sunny

    • 29
    • 55

    Mostly Sunny

    • 31
    • 54

    Mostly Sunny

Today 13 Jan Northeast Siskiyou and Northwest Modoc Counties

Sunny. Patchy fog early this morning. Highs in the mid 40s to mid 50s. Southeast Winds around 5 Mph shifting to the west this afternoon.

Tonight 13 Jan Northeast Siskiyou and Northwest Modoc Counties

Mostly clear. Patchy fog. Lows in the mid 20s to lower 30s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mammoth Temperature Statistics

January Temperature

Klamath Falls International Airport (34.2 miles)

  • Lowest 9 January, 2026

    17.1 °F

  • Average January

    34.4 °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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