Millbrae Weather Forecast

    • 56
    • 76

    Mostly Sunny

    • 56
    • 72

    Mostly Sunny

    • 57
    • 71

    Partly Sunny

    • 56
    • 76

    Mostly Sunny

    • 56
    • 76

    Mostly Sunny

    • 57
    • 72

    Partly Sunny

Today 14 Sep San Francisco Bay Shoreline

Partly cloudy in the morning then becoming sunny. Highs in the mid 70s to lower 80s. South Winds up to 5 Mph increasing to west 10 to 20 Mph in the afternoon.

Tonight 14 Sep San Francisco Bay Shoreline

Mostly clear in the evening then becoming partly cloudy. Lows in the upper 50s. Southwest Winds 10 to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Millbrae Temperature Statistics

September Temperature

San Francisco, San Francisco International Airport (1.9 miles)

  • Lowest 7 September, 2026

    56.6 °F

  • Average September

    69.3 °F

  • Highest 9 September, 2026

    94.6 °F

Climate (2021–2026)

San Francisco, San Francisco International Airport (1.9 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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