Watertown Weather Forecast

    • 58
    • 76

    Decreasing Clouds

    • 57
    • 78

    Chance Rain Showers

    • 54
    • 77

    Mostly Sunny

    • 57
    • 80

    Mostly Sunny

    • 58
    • 80

    Mostly Cloudy

    • 60
    • 77

    Partly Sunny

Today 13 Sep Southeast Middlesex

Mostly sunny. Highs in the mid 70s. South Winds 5 to 10 Mph.

Tonight 13 Sep Southeast Middlesex

Partly cloudy. Lows in the upper 50s. Southwest Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Watertown Temperature Statistics

September Temperature

Laurence G Hanscom Field Airport (8.7 miles)

  • Lowest 9 September, 2025

    43 °F

  • Average September

    63.5 °F

  • Highest 6 September, 2025

    86 °F

Climate (2020–Present)

Laurence G Hanscom Field Airport (8.7 miles)

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

  • Average Low 2020–2025

    41.7 °F

  • Average 2020–2025

    51.9 °F

  • Average High 2020–2025

    62 °F
Get WillyWeather+ to remove ads