Castlewellan Weather Forecast

    • 4
    • 12

    Partly cloudy

    • 6
    • 11

    Cloudy

    • 5
    • 12

    Cloudy

    • 6
    • 13

    Cloudy

    • 5
    • 11

    Heavy rain shower

    • 4
    • 11

    Heavy rain shower

    • 5
    • 12

    Cloudy

Today 9 May Northern Ireland

A mainly dry day with some good spells of sunshine. Perhaps the odd shower in the northwest at first, and then later towards County Down. Maximum temperature 13 °C.

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Castlewellan Temperature Statistics

May Temperature

Glenanne (36km)

  • Lowest 6 May, 2026

    2.1 °C

  • Average May

    9.4 °C

  • Highest 1 May, 2026

    17.6 °C

Climate (2021–Present)

Glenanne (36km)

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  • Average Low 2021–2026

    6.9 °C

  • Average 2021–2026

    9.7 °C

  • Average High 2021–2026

    12.8 °C
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