Merriam Lake Weather Forecast

    • 22
    • 32

    Becoming Sunny

    • 26
    • 35

    Mostly Sunny

    • 28
    • 38

    Mostly Sunny

    • 29
    • 40

    Mostly Sunny

    • 27
    • 39

    Mostly Sunny

    • 26
    • 38

    Mostly Sunny

Today 7 Dec Upper San Joaquin River

Not as cool. Mostly sunny. Highs 39 to 53. Southwest Winds up to 10 Mph.

Tonight 7 Dec Upper San Joaquin River

Mostly clear. Near steady temperature in the lower 30s. North Winds up to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Merriam Lake Temperature Statistics

December Temperature

Mammoth Yosemite Airport (22.4 miles)

  • Lowest 4 December, 2025

    10.4 °F

  • Average December

    31.9 °F

  • Highest 2 December, 2025

    59 °F

Climate (2020–Present)

Mammoth Yosemite Airport (22.4 miles)

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  • Average Low 2020–2025

    29.7 °F

  • Average 2020–2025

    46 °F

  • Average High 2020–2025

    60.8 °F
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