Westborough Weather Forecast

    • 55
    • 66

    Partly Sunny

    • 56
    • 69

    Increasing Clouds

    • 56
    • 67

    Mostly Cloudy

    • 57
    • 66

    Mostly Cloudy

    • 57
    • 70

    Partly Sunny

    • 57
    • 70

    Partly Sunny

    • 57
    • 67

    Mostly Cloudy

Today 13 Sep San Francisco Bay Shoreline

Sunny, breezy. Highs in the upper 60s to mid 70s. West Winds 20 to 30 Mph.

Tonight 13 Sep San Francisco Bay Shoreline

Mostly clear. Breezy. Lows in the mid 50s. West Winds 20 to 30 Mph. Becoming southeast 5 to 10 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Westborough Temperature Statistics

September Temperature

San Francisco, San Francisco International Airport (5 miles)

  • Lowest 7 September, 2026

    56.6 °F

  • Average September

    69.3 °F

  • Highest 9 September, 2026

    94.6 °F

Climate (2021–2026)

San Francisco, San Francisco International Airport (5 miles)

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  • Average Low 2021–2026

    52.5 °F

  • Average 2021–2026

    58.7 °F

  • Average High 2021–2026

    66.8 °F
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