Half Moon Bay - Princeton Weather Forecast

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    Rain Showers

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    Rain Showers

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    Slight Chance Rain Showers

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    Partly Sunny

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    Slight Chance Rain

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    Slight Chance Rain

Today 20 Oct San Francisco Peninsula Coast

Mostly cloudy. Highs in the lower 60s. Southeast Winds around 5 Mph. Becoming west in the afternoon.

Tonight 20 Oct San Francisco Peninsula Coast

Showers likely after midnight. Lows in the upper 40s to mid 50s. Northwest Winds around 5 Mph in the evening becoming light.

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Half Moon Bay - Princeton Temperature Statistics

October Temperature

Half Moon Bay Airport (0.6 miles)

  • Lowest 13 October, 2026

    44.6 °F

  • Average October

    60.7 °F

  • Highest 15 October, 2026

    86 °F

Climate (2021–2026)

Half Moon Bay Airport (0.6 miles)

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  • Average Low 2021–2026

    48.8 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    61.2 °F
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