Union City Weather Forecast

    • 58
    • 74

    Increasing Clouds

    • 57
    • 72

    Partly Sunny

    • 56
    • 72

    Partly Sunny

    • 57
    • 77

    Mostly Sunny

    • 59
    • 81

    Partly Sunny

    • 60
    • 81

    Partly Sunny

Today 2 Aug San Francisco Bay Shoreline

Sunny. Highs in the 60s to upper 70s. West Winds 5 to 10 Mph increasing to 10 to 20 Mph in the afternoon.

Tonight 2 Aug San Francisco Bay Shoreline

Mostly clear in the evening then becoming mostly cloudy. Lows in the upper 50s. West Winds 10 to 20 Mph.

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Union City Temperature Statistics

August Temperature

Hayward, Hayward Air Terminal (6.2 miles)

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  • Average August

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Climate (2020–Present)

Hayward, Hayward Air Terminal (6.2 miles)

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  • Average Low 2020–2025

    52.1 °F

  • Average 2020–2025

    59.4 °F

  • Average High 2020–2025

    69.1 °F
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