Merriam Lake Weather Forecast

    • 23
    • 30

    Increasing Clouds

    • 23
    • 28

    Snow

    • 18
    • 25

    Snow

    • 16
    • 23

    Snow

    • 11
    • 19

    Snow

    • 10
    • 18

    Chance Snow

Today 30 Dec Upper San Joaquin River

Not as cool. Partly sunny. Highs 36 to 50. Northeast Winds 5 to 10 Mph with Gusts to around 25 Mph shifting to the north in the afternoon.

Tonight 30 Dec Upper San Joaquin River

Mostly cloudy. Near steady temperature in the mid 30s. East Winds up to 10 Mph. Gusts up to 25 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 28 December, 2025

    1.4 °F

  • Average December

    37.2 °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

    29.7 °F

  • Average 2020–2025

    46 °F

  • Average High 2020–2025

    60.9 °F
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