San Mateo Weather Forecast

    • 46
    • 58

    Rain Showers Likely

    • 40
    • 56

    Partly Sunny

    • 40
    • 56

    Mostly Sunny

    • 41
    • 58

    Mostly Sunny

    • 42
    • 59

    Mostly Sunny

    • 45
    • 59

    Slight Chance Rain Showers

Today 26 Dec San Francisco Bay Shoreline

Mostly cloudy. A chance of Showers. A slight chance of Thunderstorms in the afternoon. Some Thunderstorms may produce heavy rainfall in the afternoon. Highs in the upper 50s. South Winds 10 to 20 Mph.

Tonight 26 Dec San Francisco Bay Shoreline

Mostly cloudy in the evening then becoming partly cloudy. A slight chance of Thunderstorms in the evening. A chance of Showers. Some Thunderstorms may produce heavy rainfall in the evening. Lows in the upper 40s. South Winds 5 to 15 Mph.

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San Mateo Temperature Statistics

December Temperature

San Francisco, San Francisco International Airport (4.3 miles)

  • Lowest 15 December, 2025

    44.1 °F

  • Average December

    52.1 °F

  • Highest 19 December, 2025

    64 °F

Climate (2020–Present)

San Francisco, San Francisco International Airport (4.3 miles)

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  • Average Low 2020–2025

    52.4 °F

  • Average 2020–2025

    58.3 °F

  • Average High 2020–2025

    66.5 °F
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