First Slough Weather Forecast

    • 66
    • 93

    Becoming Sunny

    • 63
    • 85

    Mostly Sunny

    • 59
    • 79

    Partly Sunny

    • 59
    • 79

    Mostly Sunny

    • 59
    • 78

    Mostly Sunny

    • 59
    • 79

    Mostly Sunny

Today 21 Jul San Francisco Bay Shoreline

Mostly cloudy in the morning then becoming partly cloudy. A slight chance of Showers. Highs in the 80s to lower 90s. Light Winds. Becoming northwest 10 to 15 Mph in the afternoon.

Tonight 21 Jul San Francisco Bay Shoreline

Mostly cloudy. Lows in the lower 60s. Light Winds.

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First Slough Temperature Statistics

July Temperature

San Carlos Airport (2.5 miles)

  • Lowest 1 July, 2026

    55.4 °F

  • Average July

    62.5 °F

  • Highest 14 July, 2026

    87.8 °F

Climate (2021–2026)

San Carlos Airport (2.5 miles)

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  • Average Low 2021–2026

    51.7 °F

  • Average 2021–2026

    57 °F

  • Average High 2021–2026

    68.3 °F
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