Watertown Weather Forecast

    • 54
    • 61

    Rain Showers

    • 57
    • 66

    Mostly Cloudy

    • 57
    • 72

    Partly Sunny

    • 64
    • 79

    Partly Sunny

    • 54
    • 77

    Slight Chance Rain Showers

    • 50
    • 68

    Partly Sunny

Today 28 Sep Southeast Middlesex

Showers. Patchy fog. Highs around 60. Northeast Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 90 percent.

Tonight 28 Sep Southeast Middlesex

Cloudy. Showers, mainly in the evening. Patchy fog. Lows in the lower 50s. North Winds 10 to 15 Mph. Gusts up to 25 Mph in the evening. Chance of rain 90 percent.

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Watertown Temperature Statistics

September Temperature

Laurence G Hanscom Field Airport (8.7 miles)

  • Lowest 25 September, 2026

    39 °F

  • Average September

    62.8 °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

    41.1 °F

  • Average 2021–2026

    51.6 °F

  • Average High 2021–2026

    61.6 °F
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