Treharris Weather Forecast

    • 12
    • 21

    Sunny day

    • 7
    • 17

    Cloudy

    • 10
    • 15

    Light rain

    • 8
    • 15

    Light rain shower

    • 6
    • 14

    Cloudy

    • 5
    • 13

    Cloudy

    • 4
    • 12

    Cloudy

Today 30 Apr Wales

Another largely dry day with hazy sunshine. After a chilly start, it will warm up through the day, though still holding onto brisk winds early on. Maximum temperature 23 °C.

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Treharris Temperature Statistics

April Temperature

St-athan (30km)

  • Lowest 6 April, 2026

    1.8 °C

  • Average April

    10.6 °C

  • Highest 7 April, 2026

    20.3 °C

Climate (2021–Present)

St-athan (30km)

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  • Average Low 2021–2026

    8.9 °C

  • Average 2021–2026

    11.8 °C

  • Average High 2021–2026

    14.6 °C
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