Mammoth Mountain Ski Area Weather Forecast

    • 45
    • 66

    Sunny

    • 43
    • 64

    Sunny

    • 41
    • 60

    Mostly Sunny

    • 42
    • 58

    Sunny

    • 44
    • 63

    Sunny

    • 45
    • 65

    Mostly Sunny

Today 14 Sep Mono

Sunny. Highs 69 to 79. Light Winds becoming east around 10 Mph in the afternoon.

Tonight 14 Sep Mono

Clear. Lows 34 to 44. North Winds around 10 Mph in the evening becoming light.

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Mammoth Mountain Ski Area Temperature Statistics

September Temperature

Mammoth Yosemite Airport (10.6 miles)

  • Lowest 5 September, 2026

    33.8 °F

  • Average September

    60.6 °F

  • Highest 9 September, 2026

    84.2 °F

Climate (2021–2026)

Mammoth Yosemite Airport (10.6 miles)

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  • Average Low 2021–2026

    29.4 °F

  • Average 2021–2026

    45.7 °F

  • Average High 2021–2026

    60.5 °F
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