Mammoth Mountain Ski Area Weather Forecast

    • 48
    • 63

    Patchy Smoke

    • 44
    • 56

    Chance Rain Showers

    • 46
    • 58

    Mostly Sunny

    • 49
    • 64

    Mostly Sunny

    • 47
    • 63

    Mostly Sunny

    • 44
    • 58

    Mostly Sunny

    • 42
    • 58

    Mostly Sunny

Today 20 Sep Mono

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

Tonight 20 Sep Mono

Mostly cloudy. Patchy smoke. Lows 38 to 48. Southeast Winds around 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mammoth Mountain Ski Area Temperature Statistics

September Temperature

Mammoth Yosemite Airport (10.6 miles)

  • Lowest 18 September, 2026

    28.4 °F

  • Average September

    59.1 °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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