Half Moon Bay Airport Weather Forecast

    • 49
    • 61

    Mostly Sunny

    • 50
    • 63

    Mostly Sunny

    • 50
    • 63

    Mostly Sunny

    • 48
    • 63

    Mostly Sunny

    • 49
    • 61

    Partly Sunny

    • 50
    • 60

    Mostly Cloudy

Today 9 Dec San Francisco Peninsula Coast

Sunny. Highs in the lower to mid 60s. North Winds 5 to 10 Mph.

Tonight 9 Dec San Francisco Peninsula Coast

Mostly clear. Lows in the upper 40s. Northeast Winds around 5 Mph.

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Half Moon Bay Airport Temperature Statistics

December Temperature

Half Moon Bay Airport (0 miles)

  • Lowest 1 December, 2025

    41 °F

  • Average December

    52.1 °F

  • Highest 2 December, 2025

    66.2 °F

Climate (2020–Present)

Half Moon Bay Airport (0 miles)

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  • Average Low 2020–2025

    48 °F

  • Average 2020–2025

    54.5 °F

  • Average High 2020–2025

    60.4 °F
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