Watertown Weather Forecast

    • 79
    • 98

    Hot

    • 71
    • 96

    Mostly Sunny

    • 66
    • 93

    Mostly Sunny

    • 62
    • 83

    Partly Sunny

    • 66
    • 82

    Chance Rain Showers

    • 63
    • 82

    Chance Thunderstorms

Today 14 Jul Southeast Middlesex

Mostly sunny. Hot with Highs in the upper 90s. West Winds 10 to 15 Mph. Gusts up to 20 Mph, increasing to 30 Mph in the afternoon. Heat index Values up to 104 in the afternoon.

Tonight 14 Jul Southeast Middlesex

Partly cloudy in the Evening, then becoming mostly clear. Humid with Lows in the upper 70s. West Winds 10 to 15 Mph. Gusts up to 30 Mph in the evening. Heat index Values up to 103 early in the evening.

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Watertown Temperature Statistics

July Temperature

Laurence G Hanscom Field Airport (8.7 miles)

  • Lowest 8 July, 2026

    60.1 °F

  • Average July

    76.9 °F

  • Highest 2 July, 2026

    98.1 °F

Climate (2021–2026)

Laurence G Hanscom Field Airport (8.7 miles)

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  • Average Low 2021–2026

    41.3 °F

  • Average 2021–2026

    51.7 °F

  • Average High 2021–2026

    61.7 °F
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