Grendon Underwood Weather Forecast

    • 8
    • 16

    Partly cloudy

    • 9
    • 18

    Partly cloudy

    • 10
    • 18

    Cloudy

    • 13
    • 19

    Cloudy

    • 12
    • 17

    Light rain

    • 9
    • 17

    Partly cloudy

    • 9
    • 16

    Partly cloudy

Today 29 Sep London and South East England

Any early mist and fog gradually dispersing to leave a fine, dry morning with long sunny spells. A little cloud bubbling up in the afternoon and the sunshine perhaps turning hazy, but remaining dry with light winds. Maximum Temperature 19C.

Tonight 29 Sep London and South East England

A dry and cool night, with partly cloudy skies and some clear intervals, these more prevalent toward dawn. Winds remaining light. Minimum Temperature 5C.

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Grendon Underwood Temperature Statistics

September Temperature

Benson (29km)

  • Lowest 23 September, 2025

    0.1 °C

  • Average September

    13.9 °C

  • Highest 19 September, 2025

    25.6 °C

Climate (2020–Present)

Benson (29km)

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  • Average Low 2020–2025

    6.4 °C

  • Average 2020–2025

    11 °C

  • Average High 2020–2025

    15.3 °C
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