Boston Weather Forecast

    • 61
    • 91

    Mostly Sunny

    • 59
    • 91

    Mostly Sunny

    • 63
    • 92

    Partly Sunny

    • 65
    • 92

    Partly Sunny

    • 64
    • 89

    Isolated Thunderstorms

    • 63
    • 89

    Rain Showers

Today 17 Sep Nelson

Sunny. Highs around 90. East Winds up to 5 Mph.

Tonight 17 Sep Nelson

Mostly clear. Lows in the lower 60s. East Winds up to 5 Mph in the evening becoming light.

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Boston Temperature Statistics

September Temperature

Fort Knox (17.4 miles)

  • Lowest 8 September, 2025

    49.5 °F

  • Average September

    67.7 °F

  • Highest 15 September, 2025

    88.9 °F

Climate (2020–Present)

Fort Knox (17.4 miles)

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  • Average Low 2020–2025

    47.5 °F

  • Average 2020–2025

    57.1 °F

  • Average High 2020–2025

    66.9 °F
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