Mammoth Weather Forecast

    • 57
    • 91

    Sunny

    • 54
    • 90

    Sunny

    • 53
    • 89

    Sunny

    • 53
    • 86

    Partly Sunny

    • 52
    • 82

    Mostly Sunny

    • 51
    • 83

    Mostly Sunny

    • 52
    • 86

    Mostly Sunny

Today 17 Jul Northeast Siskiyou and Northwest Modoc Counties

Sunny. Haze through the day. Isolated Thunderstorms this afternoon. Highs in the mid 80s to lower 90s. South Winds 5 to 10 Mph shifting to the west 10 to 15 Mph late this afternoon.

Tonight 17 Jul Northeast Siskiyou and Northwest Modoc Counties

Mostly clear. A 10 percent chance of Thunderstorms early this evening. Patchy smoke early this evening. Haze through the night. Lows in the mid 50s to lower 60s. West Winds 5 to 10 Mph shifting to the southwest well after midnight.

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Mammoth Temperature Statistics

July Temperature

Klamath Falls International Airport (34.2 miles)

  • Lowest 5 July, 2025

    45.6 °F

  • Average July

    71.3 °F

  • Highest 13 July, 2025

    97 °F

Climate (2020–Present)

Klamath Falls International Airport (34.2 miles)

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  • Average Low 2020–2025

    33.8 °F

  • Average 2020–2025

    48.6 °F

  • Average High 2020–2025

    63.2 °F
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