First Slough Weather Forecast

    • 46
    • 67

    Mostly Cloudy

    • 45
    • 66

    Decreasing Clouds

    • 43
    • 66

    Mostly Sunny

    • 46
    • 66

    Partly Sunny

    • 47
    • 66

    Partly Sunny

    • 46
    • 64

    Partly Sunny

    • 47
    • 61

    Partly Sunny

Today 17 Jan San Francisco Bay Shoreline

Partly cloudy. Highs in the mid 60s. Northeast Winds 5 to 10 Mph.

Tonight 17 Jan San Francisco Bay Shoreline

Mostly cloudy. Patchy fog after midnight. Lows in the 40s. North Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

First Slough Temperature Statistics

January Temperature

San Carlos Airport (2.5 miles)

  • Lowest 10 January, 2026

    37.4 °F

  • Average January

    50.8 °F

  • Highest 3 January, 2026

    64.4 °F

Climate (2021–Present)

San Carlos Airport (2.5 miles)

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  • Average Low 2021–2026

    51.4 °F

  • Average 2021–2026

    56.6 °F

  • Average High 2021–2026

    68.1 °F
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