St Lythans Weather Forecast

    • 7
    • 10

    Sunny day

    • 10
    • 11

    Cloudy

    • 7
    • 11

    Heavy rain

    • 3
    • 9

    Cloudy

    • 9
    • 11

    Heavy rain

    • 8
    • 11

    Cloudy

Today 13 Dec Wales

Bright to begin the weekend, though sunshine turning increasingly hazy through the day as cloud thickens from the north. Winds strengthening with coastal gales developing around Anglesey by this evening. Maximum Temperature 11C.

Tonight 13 Dec Wales

Mainly dry this evening but becoming increasingly cloudy and windy overnight with rain moving across Anglesey during the early hours. Milder than Friday night and staying frost free. Minimum Temperature 4C.

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St Lythans Temperature Statistics

December Temperature

St-athan (12km)

  • Lowest 5 December, 2025

    1.8 °C

  • Average December

    10 °C

  • Highest 9 December, 2025

    15.2 °C

Climate (2020–Present)

St-athan (12km)

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  • Average Low 2020–2025

    8.8 °C

  • Average 2020–2025

    11.7 °C

  • Average High 2020–2025

    14.5 °C
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