Castledawson Weather Forecast

    • 5
    • 12

    Light rain

    • 1
    • 12

    Light rain

    • 10
    • 13

    Cloudy

    • 10
    • 15

    Heavy rain shower

    • 10
    • 17

    Light rain shower

    • 13
    • 17

    Cloudy

    • 13
    • 18

    Cloudy

Today 16 May Northern Ireland

It will be cloudy with outbreaks of rain, much of the rain light and patchy although the odd heavier burst possible in the afternoon. Some brighter spells with a scattering of showers developing later. Maximum temperature 13 °C.

Tonight 16 May Northern Ireland

Bright spells and occasional showers this evening. The showers most frequent in the west and around the north coast overnight, some drier and clearer spells for Belfast and the east. Minimum temperature 6 °C.

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Castledawson Temperature Statistics

May Temperature

Lough Fea Samos (17km)

  • Lowest 10 May, 2026

    1.9 °C

  • Average May

    9.6 °C

  • Highest 1 May, 2026

    17.5 °C

Climate (2021–Present)

Lough Fea Samos (17km)

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  • Average Low 2021–2026

    6.5 °C

  • Average 2021–2026

    9.3 °C

  • Average High 2021–2026

    12.1 °C
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