Don Castro Reservoir Weather Forecast

    • 50
    • 65

    Decreasing Clouds

    • 50
    • 69

    Mostly Sunny

    • 53
    • 74

    Mostly Sunny

    • 54
    • 77

    Mostly Sunny

    • 52
    • 73

    Partly Sunny

    • 52
    • 71

    Mostly Sunny

Today 15 Oct San Francisco Bay Shoreline

Mostly cloudy in the morning then becoming partly cloudy. Highs in the mid 60s to lower 70s. Southeast Winds around 5 Mph. Becoming northwest in the afternoon.

Tonight 15 Oct San Francisco Bay Shoreline

Mostly clear in the evening then becoming partly cloudy. Lows in the lower 50s. Northwest Winds 5 to 10 Mph.

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Don Castro Reservoir Temperature Statistics

October Temperature

Hayward, Hayward Air Terminal (3.7 miles)

  • Lowest 12 October, 2025

    51.1 °F

  • Average October

    63.9 °F

  • Highest 6 October, 2025

    84 °F

Climate (2020–Present)

Hayward, Hayward Air Terminal (3.7 miles)

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  • Average Low 2020–2025

    52 °F

  • Average 2020–2025

    59.3 °F

  • Average High 2020–2025

    68.9 °F
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