Westborough Weather Forecast

    • 49
    • 63

    Increasing Clouds

    • 51
    • 63

    Partly Sunny

    • 50
    • 63

    Mostly Cloudy

    • 49
    • 60

    Mostly Cloudy

    • 50
    • 60

    Partly Sunny

    • 50
    • 61

    Mostly Sunny

Today 21 May San Francisco Bay Shoreline

Sunny. Highs in the lower 70s to mid 80s. West Winds up to 5 Mph. Becoming northwest 5 to 15 Mph in the afternoon.

Tonight 21 May San Francisco Bay Shoreline

Mostly clear. Lows in the lower 50s. West Winds 10 to 15 Mph decreasing to up to 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Westborough Temperature Statistics

May Temperature

San Francisco, San Francisco International Airport (5 miles)

  • Lowest 11 May, 2026

    50.6 °F

  • Average May

    59.9 °F

  • Highest 18 May, 2026

    79 °F

Climate (2021–Present)

San Francisco, San Francisco International Airport (5 miles)

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  • Average Low 2021–2026

    52.5 °F

  • Average 2021–2026

    58.6 °F

  • Average High 2021–2026

    66.7 °F
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