Dorchester Weather Forecast

    • 38
    • 62

    Becoming Sunny

    • 47
    • 66

    Mostly Sunny

    • 54
    • 73

    Partly Sunny

    • 53
    • 70

    Chance Rain Showers

    • 46
    • 68

    Partly Sunny

    • 46
    • 63

    Chance Rain Showers

Today 14 Sep Southern Grafton

Areas of fog in the morning. Mostly sunny. Less humid with Highs in the lower 60s. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 14 Sep Southern Grafton

Mostly clear. Lows around 40. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph in the Evening, becoming light and variable.

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Dorchester Temperature Statistics

September Temperature

Plymouth Municipal Airport (9.3 miles)

  • Lowest 9 September, 2026

    46.9 °F

  • Average September

    62.8 °F

  • Highest 10 September, 2026

    80.1 °F

Climate (2021–2026)

Plymouth Municipal Airport (9.3 miles)

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  • Average Low 2021–2026

    36.2 °F

  • Average 2021–2026

    46.4 °F

  • Average High 2021–2026

    57 °F
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