Upper Crystal Springs Reservoir Weather Forecast

    • 56
    • 91

    Sunny

    • 52
    • 68

    Increasing Clouds

    • 50
    • 60

    Mostly Cloudy

    • 52
    • 65

    Chance Rain Showers

    • 54
    • 68

    Chance Rain Showers

    • 53
    • 64

    Partly Sunny

    • 50
    • 63

    Mostly Sunny

Today 17 Oct San Francisco Bay Shoreline

Sunny. Highs in the mid 80s to lower 90s. Northwest Winds 5 to 15 Mph.

Tonight 17 Oct San Francisco Bay Shoreline

Clear. Lows in the mid 50s. West Winds 5 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Upper Crystal Springs Reservoir Temperature Statistics

October Temperature

San Carlos Airport (4.3 miles)

  • Lowest 11 October, 2026

    48.2 °F

  • Average October

    62 °F

  • Highest 6 October, 2026

    89.6 °F

Climate (2021–2026)

San Carlos Airport (4.3 miles)

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  • Average Low 2021–2026

    51.8 °F

  • Average 2021–2026

    57 °F

  • Average High 2021–2026

    68.3 °F
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