Castletownbere Weather & Climate: Best Time to Visit

The weather in Castletownbere changes moderately throughout the year, offering enough variation to appreciate each season. Average daytime temperatures reach a pleasant 18°C (64°F) in August. In January, the coolest month of the year, temperatures drop to a chilly 10°C (50°F).

At night, temperatures range from around 13°C (55°F) in August to 5°C (41°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Castletownbere has a notably wet climate with abundant precipitation, recording 1523 mm (60 in) of rainfall per year. Castletownbere experiences moderate seasonal variation in rainfall, with monthly averages ranging from 171 mm (6.7 in) in December, the wettest month, and 97 mm (3.8 in) in May, the driest month. For more details, please visit our Castletownbere Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Castletownbere can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 6.0 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 1.3 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Castletownbere.

The city experiences its highest humidity in July, reaching 80%. In April, the humidity drops to its lowest level at 72%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year