Union City Weather Forecast

    • 44
    • 70

    Mostly Sunny

    • 45
    • 72

    Becoming Sunny

    • 51
    • 72

    Mostly Cloudy

    • 47
    • 69

    Partly Sunny

    • 48
    • 67

    Partly Sunny

    • 47
    • 65

    Mostly Cloudy

    • 43
    • 61

    Chance Rain

Today 3 Feb San Francisco Bay Shoreline

Sunny. Highs in the mid 60s to lower 70s. Northeast Winds around 5 Mph.

Tonight 3 Feb San Francisco Bay Shoreline

Clear. Lows in the 40s. Northeast Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Union City Temperature Statistics

February Temperature

Hayward, Hayward Air Terminal (6.2 miles)

  • Lowest 1 February, 2026

    46.9 °F

  • Average February

    53.8 °F

  • Highest 1 February, 2026

    63 °F

Climate (2021–Present)

Hayward, Hayward Air Terminal (6.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    52.1 °F

  • Average 2021–2026

    59.3 °F

  • Average High 2021–2026

    68.8 °F
Get WillyWeather+ to remove ads