Hayward Weather Forecast

    • 50
    • 55

    Rain

    • 51
    • 61

    Rain Likely

    • 56
    • 61

    Rain

    • 53
    • 61

    Rain

    • 49
    • 58

    Rain Likely

    • 47
    • 58

    Rain Likely

    • 44
    • 57

    Slight Chance Rain

Today 31 Dec San Francisco Bay Shoreline

Rain. Highs in the mid 50s. East Winds 5 to 10 Mph.

Tonight 31 Dec San Francisco Bay Shoreline

Rain. Lows around 50. Northeast Winds 5 to 10 Mph.

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Hayward Temperature Statistics

December Temperature

Hayward, Hayward Air Terminal (1.9 miles)

  • Lowest 28 December, 2025

    39.9 °F

  • Average December

    51.9 °F

  • Highest 3 December, 2025

    64.9 °F

Climate (2021–Present)

Hayward, Hayward Air Terminal (1.9 miles)

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  • Average Low 2021–2025

    52.1 °F

  • Average 2021–2025

    59.3 °F

  • Average High 2021–2025

    68.8 °F
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