Watertown Weather Forecast

    • 57
    • 87

    Decreasing Clouds

    • 51
    • 76

    Mostly Sunny

    • 62
    • 77

    Chance Rain Showers

    • 64
    • 78

    Chance Rain Showers

    • 59
    • 80

    Partly Sunny

    • 66
    • 79

    Partly Sunny

Today 10 Sep Southeast Middlesex

Partly sunny with scattered Showers in the Morning, then sunny in the afternoon. Highs in the upper 80s. West Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 50 percent.

Tonight 10 Sep Southeast Middlesex

Partly cloudy. Cooler. Less humid with Lows in the mid 50s. West 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 7 September, 2026

    46.9 °F

  • Average September

    65.8 °F

  • Highest 4 September, 2026

    84 °F

Climate (2021–2026)

Laurence G Hanscom Field Airport (8.7 miles)

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  • Average Low 2021–2026

    41.2 °F

  • Average 2021–2026

    51.6 °F

  • Average High 2021–2026

    61.7 °F
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