Watertown Weather Forecast

    • 68
    • 85

    Becoming Sunny

    • 60
    • 88

    Rain Showers

    • 54
    • 70

    Rain Showers Likely

    • 52
    • 75

    Mostly Sunny

    • 50
    • 72

    Partly Sunny

    • 53
    • 72

    Partly Sunny

Today 5 Sep Southeast Middlesex

Sunny. Near steady temperature in the lower 80s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 5 Sep Southeast Middlesex

Mostly clear. Humid with Lows in the upper 60s. South Winds 10 to 15 Mph. Gusts up to 25 Mph in the evening.

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Watertown Temperature Statistics

September Temperature

Laurence G Hanscom Field Airport (8.7 miles)

  • Lowest 1 September, 2025

    48 °F

  • Average September

    64.4 °F

  • Highest 3 September, 2025

    80.1 °F

Climate (2020–Present)

Laurence G Hanscom Field Airport (8.7 miles)

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  • Average Low 2020–2025

    41.7 °F

  • Average 2020–2025

    52 °F

  • Average High 2020–2025

    62.1 °F
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