Llyn Cwellyn Weather Forecast

    • 7
    • 16

    Light rain

    • 8
    • 15

    Sunny day

    • 14
    • 19

    Cloudy

    • 10
    • 17

    Light rain shower

    • 9
    • 15

    Light rain shower

    • 9
    • 15

    Cloudy

Today 27 Sep Wales

A dry but largely cloudy start on Sunday. Heavy and persistent rain will arrive later, with strengthening winds. Mild but feeling cooler in the rain. Maximum temperature 21 °C.

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Llyn Cwellyn Temperature Statistics

September Temperature

Capel Curig Saws (14km)

  • Lowest 24 September, 2026

    4.5 °C

  • Average September

    14.2 °C

  • Highest 6 September, 2026

    21.8 °C

Climate (2021–2026)

Capel Curig Saws (14km)

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  • Average Low 2021–2026

    7 °C

  • Average 2021–2026

    10 °C

  • Average High 2021–2026

    12.9 °C
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