Westborough Weather Forecast

    • 53
    • 65

    Partly Sunny

    • 54
    • 63

    Partly Sunny

    • 53
    • 58

    Partly Sunny

    • 54
    • 65

    Mostly Sunny

    • 56
    • 71

    Mostly Sunny

    • 55
    • 70

    Partly Sunny

Today 25 Sep San Francisco Bay Shoreline

Partly cloudy in the morning then becoming sunny. Breezy. Highs in the 70s. West Winds 10 to 15 Mph increasing to 20 to 30 Mph in the afternoon.

Tonight 25 Sep San Francisco Bay Shoreline

Mostly clear in the evening then becoming partly cloudy. Lows in the mid 50s. West Winds 10 to 20 Mph. Becoming southwest 5 to 10 Mph after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Westborough Temperature Statistics

September Temperature

San Francisco, San Francisco International Airport (5 miles)

  • Lowest 23 September, 2026

    55 °F

  • Average September

    66.8 °F

  • Highest 9 September, 2026

    94.6 °F

Climate (2021–2026)

San Francisco, San Francisco International Airport (5 miles)

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

  • Average Low 2021–2026

    52.5 °F

  • Average 2021–2026

    58.7 °F

  • Average High 2021–2026

    66.8 °F
Get WillyWeather+ to remove ads