Ballycastle Weather & Climate: Best Time to Visit

The climate in Ballycastle, Mayo, Ireland, sees a moderate range of temperatures across the year, from 18°C (64°F) in August down to 10°C (50°F) in February.

The city receives considerable rainfall, with around 1479 mm (58 in) annually. November is the wettest month. The sunniest month is May, with 6.4 hours of sunshine per day on average.

Monthly Temperature in Ballycastle

The weather in Ballycastle changes moderately throughout the year, offering enough variation to appreciate each season. Typically, average maximum daytime temperatures range from a moderate 18°C (64°F) in August to a chilly 10°C (50°F) in the coolest month, February.

Nights vary from 13°C (55°F) in August to around 5°C (41°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Rainfall in Ballycastle

Ballycastle experiences significant rainfall throughout the year, averaging 1479 mm (58 in) of precipitation annually. Precipitation levels in Ballycastle remain relatively steady throughout the year. November has the most rain, with 155 mm (6.1 in) over 24 days. In the driest month May, this drops slightly to 98 mm (3.9 in), making the city's climate fairly predictable. For more details, please visit our Ballycastle Precipitation page.

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

The average number of days each month with precipitation

Sunshine Hours in Ballycastle

For those who appreciate different seasons, Ballycastle serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 6.4 hours of sunshine daily, and embrace the darker days in December, offering only 1.3 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Data from: Belmullet, Ireland (41 KM, 25 Miles).

Daily hours of sunshine

Data from: Belmullet, Ireland (41 KM, 25 Miles).

Daily percentage of sunshine

Data from: Belmullet, Ireland (41 KM, 25 Miles).

Humidity in Ballycastle by Month

The relative humidity is high throughout the year in Ballycastle.

The city experiences its highest humidity in December, reaching 83%. In April, the humidity drops to its lowest level at 74%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year

Data from: Belmullet, Ireland (41 KM, 25 Miles).

Ballycastle 3-Day Forecast

10-Day Forecast

Select a Month

Check the conditions for any month of the year.

Best Time to Visit Ballycastle

The best time to visit Ballycastle is during July, August and September, when the weather provides comfortable temperatures between 17°C (62°F) and 18°C (64°F). With rainfall of 116 mm (4.6 in) to 121 mm (4.8 in), you can expect pleasant weather during your visit in these months.

Wondering where to travel based on your weather preferences? Our recommendation tool helps you find destinations with your ideal climate conditions. Use our weather planner to find your perfect destination.