River Thames - Chiswick Bridge Weather Forecast

    • 12
    • 22

    Cloudy

    • 15
    • 25

    Partly cloudy

    • 15
    • 24

    Light rain

    • 15
    • 25

    Cloudy

    • 11
    • 22

    Partly cloudy

    • 12
    • 21

    Cloudy

    • 11
    • 21

    Cloudy

Today 11 Sep London and South East England

Generally dry with sunny intervals, but there is a risk of some showers first thing, these mainly near Kent and dying out during the morning. Winds falling light, and feeling warm in the sunshine. Maximum temperature 23 °C.

Tonight 11 Sep London and South East England

A dry evening with sunny spells, then remaining dry with clear spells overnight. Wind perhaps picking up a little by dawn. Minimum temperature 6 °C.

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River Thames - Chiswick Bridge Temperature Statistics

September Temperature

Heathrow (12km)

  • Lowest 9 September, 2026

    11.5 °C

  • Average September

    18.2 °C

  • Highest 6 September, 2026

    27.6 °C

Climate (2021–2026)

Heathrow (12km)

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  • Average Low 2021–2026

    8.9 °C

  • Average 2021–2026

    12.7 °C

  • Average High 2021–2026

    16.6 °C
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