Union City Weather Forecast

    • 51
    • 73

    Mostly Sunny

    • 51
    • 72

    Partly Sunny

    • 53
    • 65

    Mostly Cloudy

    • 49
    • 64

    Partly Sunny

    • 50
    • 69

    Mostly Sunny

    • 52
    • 73

    Partly Sunny

Today 22 May San Francisco Bay Shoreline

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

Tonight 22 May San Francisco Bay Shoreline

Mostly clear. Lows in the lower 50s. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Union City Temperature Statistics

May Temperature

Hayward, Hayward Air Terminal (6.2 miles)

  • Lowest 6 May, 2024

    46.7 °F
  • Average May

    62.2 °F
  • Highest 9 May, 2024

    87.7 °F

Climate (2019–Present)

Hayward, Hayward Air Terminal (6.2 miles)

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  • Average Low 2019–2024

    51.8 °F
  • Average 2019–2024

    58.9 °F
  • Average High 2019–2024

    68.5 °F
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