Half Moon Bay Airport Weather Forecast

    • 48
    • 69

    Mostly Sunny

    • 46
    • 67

    Partly Sunny

    • 47
    • 60

    Partly Sunny

    • 51
    • 61

    Mostly Cloudy

    • 53
    • 63

    Rain Likely

    • 50
    • 60

    Chance Rain

Today 12 Dec San Francisco Peninsula Coast

Sunny. Highs in the upper 60s. Northeast Winds 10 to 20 Mph.

Tonight 12 Dec San Francisco Peninsula Coast

Mostly clear. Lows in the mid 40s. Southeast Winds 5 to 10 Mph.

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  • Temperature Real-Time

Half Moon Bay Airport Temperature Statistics

December Temperature

Half Moon Bay Airport (0 miles)

  • Lowest 1 December, 2025

    41 °F

  • Average December

    52.2 °F

  • Highest 10 December, 2025

    69.8 °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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