Dorchester Weather Forecast

    • 14
    • 18

    Cloudy

    • 11
    • 19

    Cloudy

    • 15
    • 17

    Cloudy

    • 14
    • 19

    Cloudy

    • 12
    • 19

    Partly cloudy

    • 13
    • 20

    Sunny day

    • 12
    • 20

    Sunny day

Today 16 Sep South West England

A mixture of sunshine and showers on Wednesday, these most frequent in the morning before easing from the west. Rain then arriving overnight. Cooler than Tuesday. Maximum temperature 19 °C.

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Dorchester Temperature Statistics

September Temperature

Isle Of Portland (21km)

  • Lowest 10 September, 2026

    14.2 °C

  • Average September

    17.6 °C

  • Highest 6 September, 2026

    21.6 °C

Climate (2021–2026)

Isle Of Portland (21km)

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  • Average Low 2021–2026

    10.6 °C

  • Average 2021–2026

    12.5 °C

  • Average High 2021–2026

    14.4 °C
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