William Cann Neighborhood Park Weather Forecast

    • 55
    • 73

    Decreasing Clouds

    • 55
    • 73

    Partly Sunny

    • 54
    • 67

    Partly Sunny

    • 56
    • 74

    Mostly Sunny

    • 59
    • 81

    Mostly Sunny

    • 58
    • 80

    Mostly Sunny

Today 25 Sep San Francisco Bay Shoreline

Partly cloudy in the morning then becoming sunny. Breezy. Highs in the 70s. West Winds 10 to 15 Mph increasing to 20 to 30 Mph in the afternoon.

Tonight 25 Sep San Francisco Bay Shoreline

Mostly clear in the evening then becoming partly cloudy. Lows in the mid 50s. West Winds 10 to 20 Mph. Becoming southwest 5 to 10 Mph after midnight.

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William Cann Neighborhood Park Temperature Statistics

September Temperature

Hayward, Hayward Air Terminal (6.2 miles)

  • Lowest 7 September, 2026

    55.7 °F

  • Average September

    67.4 °F

  • Highest 9 September, 2026

    99.6 °F

Climate (2021–2026)

Hayward, Hayward Air Terminal (6.2 miles)

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  • Average Low 2021–2026

    52.4 °F

  • Average 2021–2026

    59.8 °F

  • Average High 2021–2026

    69.2 °F
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