Porton Down Weather Forecast

    • 10
    • 13

    Cloudy

    • 11
    • 17

    Light rain

    • 11
    • 18

    Light rain shower

    • 12
    • 20

    Cloudy

    • 13
    • 22

    Cloudy

    • 11
    • 21

    Partly cloudy

    • 12
    • 22

    Sunny day

Today 18 May South West England

A rather cloudy day with further spells of showery rain, possibly heavy at times. A band of more persistent rain and stronger winds then arriving later in the afternoon. Maximum temperature 15 °C.

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Porton Down Temperature Statistics

May Temperature

Boscombe Down (4km)

  • Lowest 11 May, 2026

    1.3 °C

  • Average May

    10.9 °C

  • Highest 9 May, 2026

    20.7 °C

Climate (2021–Present)

Boscombe Down (4km)

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  • Average Low 2021–2026

    7.3 °C

  • Average 2021–2026

    11.2 °C

  • Average High 2021–2026

    15.1 °C
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