Merriam Lake Weather Forecast

    • 26
    • 38

    Increasing Clouds

    • 27
    • 36

    Becoming Sunny

    • 26
    • 40

    Mostly Sunny

    • 27
    • 40

    Chance Snow

    • 26
    • 30

    Chance Snow

    • 24
    • 28

    Chance Snow

    • 23
    • 29

    Chance Snow

Today 16 Dec Upper San Joaquin River

Not as cool. Mostly sunny. Highs 43 to 59. West Winds up to 10 Mph.

Tonight 16 Dec Upper San Joaquin River

Partly cloudy. A 20 percent chance of rain late in the night. Lows 31 to 41. West Winds up to 15 Mph. Gusts up to 30 Mph increasing to 40 Mph after midnight.

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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

    35.2 °F

  • Highest 11 December, 2025

    66.2 °F

Climate (2020–Present)

Mammoth Yosemite Airport (22.4 miles)

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  • Average Low 2020–2025

    29.6 °F

  • Average 2020–2025

    46 °F

  • Average High 2020–2025

    60.8 °F
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