Merriam Lake Weather Forecast

    • 34
    • 51

    Decreasing Clouds

    • 35
    • 48

    Sunny

    • 38
    • 53

    Sunny

    • 38
    • 54

    Sunny

    • 39
    • 55

    Mostly Sunny

    • 43
    • 55

    Mostly Sunny

    • 44
    • 58

    Mostly Sunny

Today 3 Jul Upper San Joaquin River

Sunny. Highs 59 to 75. South Winds up to 10 Mph shifting to the southwest in the afternoon. Gusts up to 30 Mph.

Tonight 3 Jul Upper San Joaquin River

Colder. Partly cloudy early in the evening then becoming clear. Lows 37 to 49. Southwest Winds 5 to 15 Mph with Gusts to around 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Merriam Lake Temperature Statistics

July Temperature

Mammoth Yosemite Airport (22.4 miles)

  • Lowest 1 July, 2025

    42.8 °F

  • Average July

    64.5 °F

  • Highest 1 July, 2025

    80.6 °F

Climate (2020–Present)

Mammoth Yosemite Airport (22.4 miles)

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  • Average Low 2020–2025

    29.8 °F

  • Average 2020–2025

    46.4 °F

  • Average High 2020–2025

    61.2 °F
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