Half Moon Bay Weather Forecast

    • 49
    • 60

    Slight Chance Rain Showers

    • 49
    • 61

    Mostly Cloudy

    • 44
    • 59

    Chance Rain

    • 43
    • 58

    Mostly Sunny

    • 43
    • 60

    Mostly Sunny

    • 45
    • 60

    Mostly Sunny

Today 18 Jan San Francisco Peninsula Coast

Mostly cloudy. A slight chance of Showers in the afternoon. Highs in the upper 50s. South Winds 10 to 20 Mph.

Tonight 18 Jan San Francisco Peninsula Coast

Mostly cloudy. A slight chance of Showers. Lows in the lower 50s. Southeast Winds 10 to 20 Mph.

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Half Moon Bay Temperature Statistics

January Temperature

Half Moon Bay Airport (5 miles)

  • Lowest 11 January, 2019

    44.6 °F
  • Average January

    53.6 °F
  • Highest 11 January, 2019

    60.8 °F

Climate (2010–Present)

Half Moon Bay Airport (5 miles)

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  • Average Low 2010–Present

    48.6 °F
  • Average 2010–Present

    55 °F
  • Average High 2010–Present

    60.9 °F
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