Merriam Lake Weather Forecast

    • 21
    • 33

    Mostly Sunny

    • 21
    • 33

    Partly Sunny

    • 26
    • 30

    Mostly Sunny

    • 26
    • 36

    Partly Sunny

    • 27
    • 33

    Partly Sunny

    • 24
    • 30

    Chance Snow

    • 23
    • 27

    Chance Snow

Today 15 Dec Upper San Joaquin River

Sunny. Highs 40 to 56. North Winds up to 10 Mph.

Tonight 15 Dec Upper San Joaquin River

Mostly clear. Near steady temperature in the mid 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

    35.3 °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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