Half Moon Bay - Princeton Weather Forecast

    • 46
    • 67

    Mostly Sunny

    • 44
    • 66

    Mostly Sunny

    • 46
    • 63

    Mostly Sunny

    • 46
    • 61

    Patchy Fog

    • 51
    • 62

    Chance Rain Showers

    • 51
    • 63

    Chance Rain Showers

Today 11 Dec San Francisco Peninsula Coast

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

Tonight 11 Dec San Francisco Peninsula Coast

Mostly clear. Lows in the mid 40s to lower 50s. Northeast Winds 5 to 15 Mph.

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Half Moon Bay - Princeton Temperature Statistics

December Temperature

Half Moon Bay Airport (0.6 miles)

  • Lowest 1 December, 2025

    41 °F

  • Average December

    51.8 °F

  • Highest 2 December, 2025

    66.2 °F

Climate (2020–Present)

Half Moon Bay Airport (0.6 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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