Castledawson Weather Forecast

    • 9
    • 15

    Heavy rain shower

    • 12
    • 16

    Light rain

    • 13
    • 18

    Light rain shower

    • 11
    • 18

    Light rain

    • 11
    • 18

    Cloudy

    • 11
    • 19

    Sunny day

Today 19 May Northern Ireland

Early rain across northern areas will quickly clear. Then bright spells and frequent showers for the rest of the day, some likely heavy and thundery in the afternoon. Maximum temperature 18 °C.

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Castledawson Temperature Statistics

May Temperature

Lough Fea Samos (17km)

  • Lowest 10 May, 2026

    1.9 °C

  • Average May

    9.5 °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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