St Mellons Weather Forecast

    • 11
    • 18

    Cloudy

    • 9
    • 20

    Cloudy

    • 7
    • 15

    Cloudy

    • 7
    • 15

    Partly cloudy

    • 9
    • 15

    Cloudy

    • 8
    • 13

    Light rain shower

    • 7
    • 13

    Light rain shower

Today 8 May Wales

A rather grey start with some showery outbreaks of rain. The cloud will break up allowing some spells of sunshine, but this may also trigger some heavier showers by the afternoon. Feeling warmer, especially in any sunshine. Maximum temperature 18 °C.

Tonight 8 May Wales

Showers fading this evening, leaving a dry and clear night to develop across the country. Turning chilly under the clear skies, especially in the countryside. Minimum temperature 5 °C.

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St Mellons Temperature Statistics

May Temperature

St-athan (27km)

  • Lowest 2 May, 2026

    7.3 °C

  • Average May

    11.8 °C

  • Highest 4 May, 2026

    16.9 °C

Climate (2021–Present)

St-athan (27km)

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  • Average Low 2021–2026

    9 °C

  • Average 2021–2026

    11.8 °C

  • Average High 2021–2026

    14.6 °C
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