Watertown Weather Forecast

    • 51
    • 64

    Decreasing Clouds

    • 51
    • 64

    Partly Sunny

    • 51
    • 63

    Mostly Cloudy

    • 53
    • 62

    Rain Showers Likely

    • 54
    • 63

    Rain Showers Likely

    • 53
    • 64

    Chance Rain Showers

Today 22 Sep Southeast Middlesex

Mostly cloudy in the Morning, then becoming mostly sunny. Highs in the lower 60s. Northeast Winds 10 to 15 Mph.

Tonight 22 Sep Southeast Middlesex

Partly cloudy. Lows in the lower 50s. Northeast Winds 5 to 10 Mph. Gusts up to 20 Mph after midnight.

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Watertown Temperature Statistics

September Temperature

Laurence G Hanscom Field Airport (8.7 miles)

  • Lowest 15 September, 2026

    41 °F

  • Average September

    65.3 °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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