Horndean Weather Forecast

    • 16
    • 25

    Sunny day

    • 18
    • 24

    Thunder

    • 15
    • 22

    Partly cloudy

    • 15
    • 21

    Light rain shower

    • 16
    • 20

    Light rain

    • 14
    • 20

    Light rain shower

    • 12
    • 20

    Thunder shower

Today 25 Aug London and South East England

A dry and bright day with lengthy sunny spells. Light to moderate easterly winds throughout, leading to a cooler feel around the coastal areas, but turning increasingly humid. Maximum temperature 27 °C.

Tonight 25 Aug London and South East England

A dry start to the evening but cloud will start to thicken across higher ground to the north overnight. Thundery showers moving into the south. Feeling mild. Minimum temperature 17 °C.

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Horndean Temperature Statistics

August Temperature

Thorney Island (12km)

  • Lowest 8 August, 2026

    10.6 °C

  • Average August

    20.2 °C

  • Highest 13 August, 2026

    32 °C

Climate (2021–2026)

Thorney Island (12km)

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  • Average Low 2021–2026

    9 °C

  • Average 2021–2026

    12.3 °C

  • Average High 2021–2026

    15.6 °C
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