Rainbow Lake Weather Forecast

    • 36
    • 58

    Becoming Sunny

    • 34
    • 55

    Mostly Sunny

    • 35
    • 55

    Sunny

    • 38
    • 59

    Sunny

    • 39
    • 60

    Mostly Sunny

    • 39
    • 59

    Partly Sunny

Today 15 Sep Upper San Joaquin River

Sunny. Highs 56 to 70. Southwest Winds up to 15 Mph. Gusts up to 30 Mph in the afternoon.

Tonight 15 Sep Upper San Joaquin River

Clear. Lows 35 to 47. South Winds up to 10 Mph with Gusts to around 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rainbow Lake Temperature Statistics

September Temperature

Mammoth Yosemite Airport (14.9 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 (14.9 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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