San Mateo Weather Forecast

    • 65
    • 87

    Increasing Clouds

    • 65
    • 92

    Partly Sunny

    • 61
    • 85

    Mostly Sunny

    • 58
    • 78

    Mostly Sunny

    • 57
    • 76

    Mostly Sunny

    • 57
    • 78

    Mostly Sunny

Today 8 Sep San Francisco Bay Shoreline

Sunny in the morning then becoming partly cloudy. Highs in the 80s. Light Winds. Becoming northwest 5 to 10 Mph in the afternoon.

Tonight 8 Sep San Francisco Bay Shoreline

Mostly cloudy. Lows in the upper 60s. Northwest Winds 5 to 10 Mph in the evening. Becoming light.

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San Mateo Temperature Statistics

September Temperature

San Francisco, San Francisco International Airport (4.3 miles)

  • Lowest 4 September, 2026

    58.6 °F

  • Average September

    66.2 °F

  • Highest 2 September, 2026

    73.7 °F

Climate (2021–2026)

San Francisco, San Francisco International Airport (4.3 miles)

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  • Average Low 2021–2026

    52.5 °F

  • Average 2021–2026

    58.7 °F

  • Average High 2021–2026

    66.8 °F
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