Castlerock Weather in May

With daytime temperatures of 13°C (55°F) and nighttime lows of 8°C (46°F), May in Castlerock brings moderate temperatures during the day. It is also the driest month of the year, with minimal rainfall.

Rainfall in Castlerock in May

With the lowest rainfall figures of the year, conditions are ideal for exploring the outdoors, even if the temperatures require a jacket. Historically, the month has about 17 days of rain, averaging 81 mm (3.2 in) in total. Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.

Temperature in Castlerock in May

May in Castlerock brings typical temperatures with highs around 13°C (55°F) and lows of 8°C (46°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 8°C (46°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Castlerock in May

Expect a lot of sunshine this month, with about 203 hours of sun. These sunny conditions help offset the cool temperatures, making it a pleasant month to explore outdoors.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. June typically offers the best weather for Castlerock.