Castledawson Weather Forecast

    • 10
    • 14

    Cloudy

    • 10
    • 15

    Heavy rain shower

    • 11
    • 16

    Partly cloudy

    • 13
    • 18

    Light rain

    • 12
    • 17

    Cloudy

    • 12
    • 18

    Partly cloudy

Today 18 May Northern Ireland

Patchy mist and fog quickly clearing first thing. Otherwise largely dry with sunny spells, but turning cloudier through the afternoon ahead of evening rain setting in. Maximum temperature 14 °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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