Half Moon Bay Airport Weather Forecast

    • 57
    • 63

    Mostly Cloudy

    • 59
    • 68

    Partly Sunny

    • 61
    • 70

    Mostly Cloudy

    • 64
    • 72

    Mostly Cloudy

    • 62
    • 70

    Mostly Cloudy

    • 60
    • 66

    Mostly Cloudy

Today 6 Sep San Francisco Peninsula Coast

Mostly cloudy in the morning then becoming partly cloudy. Highs in the mid 60s. West Winds 5 to 15 Mph.

Tonight 6 Sep San Francisco Peninsula Coast

Mostly cloudy. Lows in the mid 50s. Northwest Winds 5 to 15 Mph.

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Half Moon Bay Airport Temperature Statistics

September Temperature

Half Moon Bay Airport (0 miles)

  • Lowest 2 September, 2026

    55.4 °F

  • Average September

    61.6 °F

  • Highest 1 September, 2026

    66.2 °F

Climate (2021–2026)

Half Moon Bay Airport (0 miles)

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  • Average Low 2021–2026

    48.7 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    61.1 °F
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