Watertown Weather Forecast

    • 53
    • 71

    Becoming Sunny

    • 58
    • 77

    Mostly Sunny

    • 60
    • 81

    Partly Sunny

    • 68
    • 78

    Chance Rain Showers

    • 62
    • 83

    Slight Chance Rain Showers

    • 57
    • 76

    Mostly Sunny

    • 61
    • 77

    Partly Sunny

Today 6 Sep Southeast Middlesex

Mostly sunny. Near steady temperature in the upper 60s. North Winds around 5 Mph.

Tonight 6 Sep Southeast Middlesex

Partly cloudy with isolated Showers this Evening, then mostly clear after midnight. Lows in the lower 50s. Northwest Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Watertown Temperature Statistics

September Temperature

Laurence G Hanscom Field Airport (8.7 miles)

  • Lowest 2 September, 2026

    60.1 °F

  • Average September

    67.6 °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

    51.7 °F

  • Average High 2021–2026

    61.7 °F
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