Booster Park Weather Forecast

    • 56
    • 78

    Increasing Clouds

    • 56
    • 71

    Mostly Cloudy

    • 55
    • 73

    Partly Sunny

    • 57
    • 75

    Mostly Sunny

    • 62
    • 83

    Mostly Sunny

    • 62
    • 87

    Mostly Sunny

    • 58
    • 80

    Partly Sunny

Today 19 Sep San Francisco Bay Shoreline

Sunny. Highs in the 70s to lower 80s. West Winds up to 5 Mph increasing to 10 to 20 Mph in the afternoon.

Tonight 19 Sep San Francisco Bay Shoreline

Partly cloudy in the evening then becoming mostly cloudy. Lows in the upper 50s. West Winds 10 to 20 Mph. Becoming 5 to 10 Mph after midnight.

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  • Temperature Real-Time

Booster Park Temperature Statistics

September Temperature

San Jose, San Jose International Airport (8.1 miles)

  • Lowest 5 September, 2026

    54.6 °F

  • Average September

    70.7 °F

  • Highest 9 September, 2026

    97.6 °F

Climate (2021–2026)

San Jose, San Jose International Airport (8.1 miles)

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  • Average Low 2021–2026

    52.3 °F

  • Average 2021–2026

    62.1 °F

  • Average High 2021–2026

    72.8 °F
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