Porton Down Weather Forecast

    • 16
    • 25

    Sunny day

    • 14
    • 27

    Partly cloudy

    • 16
    • 31

    Sunny day

    • 11
    • 25

    Sunny day

    • 11
    • 24

    Partly cloudy

    • 14
    • 25

    Partly cloudy

    • 15
    • 25

    Light rain shower

Today 27 Jul South West England

A dry start with bright spells, and it should remain dry throughout the day, with an increasingly sunny afternoon developing. However, it will turn cloudier across Devon and Cornwall by mid-afternoon. Feeling very warm in the sunshine. Maximum temperature 23 °C.

Tonight 27 Jul South West England

Remaining dry overnight with clear spells for many, variable amounts of cloud will continue to feed in across Devon and Cornwall. Light winds. Minimum temperature 13 °C.

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Porton Down Temperature Statistics

July Temperature

Boscombe Down (4km)

  • Lowest 3 July, 2026

    10.1 °C

  • Average July

    20.8 °C

  • Highest 10 July, 2026

    32.4 °C

Climate (2021–2026)

Boscombe Down (4km)

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  • Average Low 2021–2026

    7.4 °C

  • Average 2021–2026

    11.3 °C

  • Average High 2021–2026

    15.3 °C
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