Watertown Weather Forecast

    • 62
    • 72

    Rain Showers

    • 48
    • 75

    Partly Sunny

    • 54
    • 66

    Mostly Sunny

    • 61
    • 78

    Partly Sunny

    • 63
    • 81

    Chance Rain Showers

    • 58
    • 77

    Slight Chance Rain Showers

Today 13 Sep Southeast Middlesex

Showers with isolated Thunderstorms. Locally heavy rainfall possible in the morning. Humid with Highs in the lower 70s. South Winds around 5 Mph, becoming east in the afternoon. Chance of rain 80 percent.

Tonight 13 Sep Southeast Middlesex

Mostly cloudy. Patchy fog. Humid with Lows in the lower 60s. West Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Watertown Temperature Statistics

September Temperature

Laurence G Hanscom Field Airport (8.7 miles)

  • Lowest 7 September, 2026

    46.9 °F

  • Average September

    66.7 °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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