Portola Weather Forecast

    • 54
    • 64

    Partly Sunny

    • 55
    • 71

    Mostly Sunny

    • 57
    • 79

    Mostly Sunny

    • 57
    • 79

    Partly Sunny

    • 58
    • 71

    Partly Sunny

    • 57
    • 70

    Partly Sunny

Today 27 Sep San Francisco

Mostly cloudy in the morning then becoming partly cloudy. A slight chance of drizzle. Highs in the upper 50s to mid 60s. West Winds 10 to 20 Mph.

Tonight 27 Sep San Francisco

Partly cloudy in the evening then becoming mostly cloudy. A slight chance of drizzle. Lows in the mid 50s. West Winds 10 to 20 Mph.

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  • Temperature Real-Time

Portola Temperature Statistics

September Temperature

San Francisco, San Francisco International Airport (7.5 miles)

  • Lowest 23 September, 2026

    55.7 °F

  • Average September

    66.9 °F

  • Highest 9 September, 2026

    94.6 °F

Climate (2021–2026)

San Francisco, San Francisco International Airport (7.5 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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