Treharris Weather Forecast

    • 4
    • 6

    Partly cloudy

    • 9
    • 11

    Overcast

    • 7
    • 10

    Light rain

    • 8
    • 9

    Light rain

    • 5
    • 13

    Heavy rain

    • 4
    • 7

    Partly cloudy

Today 14 Dec Wales

After a cloudy and damp start, skies brightening up through the morning to give sunnier spells and a few scattered showers. Light winds through much of the day, but becoming breezier by the evening. Still feeling chilly. Maximum Temperature 9C.

Tonight 14 Dec Wales

Cloud building this evening with patchy outbreaks of rain and drizzle through the night. Remaining breezy, especially over the hills. A chilly start but turning milder. Minimum Temperature 5C.

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Treharris Temperature Statistics

December Temperature

St-athan (30km)

  • Lowest 3 December, 2024

    2.5 °C
  • Average December

    7.9 °C
  • Highest 1 December, 2024

    14.4 °C

Climate (2019–Present)

St-athan (30km)

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  • Average Low 2019–2024

    8.7 °C
  • Average 2019–2024

    11.5 °C
  • Average High 2019–2024

    14.4 °C
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