Dorchester Weather Forecast

    • 14
    • 19

    Cloudy

    • 13
    • 20

    Thunder shower

    • 14
    • 19

    Light rain

    • 14
    • 18

    Light rain shower

    • 12
    • 18

    Light rain shower

    • 13
    • 18

    Heavy rain shower

    • 13
    • 18

    Heavy rain shower

Today 28 Aug South West England

Scattered blustery showers developing across the region, potentially heavy with thunder and hail at times. Some sunny spells breaking through between showers, but temperatures slightly down compared to Wednesday. Maximum Temperature 20C.

Tonight 28 Aug South West England

An area of more persistent heavy rain spreading west to east across the region overnight, with the odd rumble of thunder, followed by showers. Slightly misty over the hills. Breezy but staying rather mild for most. Minimum Temperature 12C.

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Dorchester Temperature Statistics

August Temperature

Isle Of Portland (21km)

  • Lowest 21 August, 2025

    12.9 °C

  • Average August

    18.1 °C

  • Highest 15 August, 2025

    23.9 °C

Climate (2020–Present)

Isle Of Portland (21km)

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  • Average Low 2020–2025

    10.3 °C

  • Average 2020–2025

    12.1 °C

  • Average High 2020–2025

    14 °C
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