Ballycastle Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Ballycastle.
Climate overview of Ballycastle
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 January.
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.
Ballycastle Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ballycastle - and find the best time to visit.
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, January.
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
Daily hours of sunshine
Daily percentage of sunshine
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
Best Time to Visit Ballycastle
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May and August
- Warmest weather: July, August and September
- Most sunshine: May
Frequently asked questions about the climate in Ballycastle
What is the best time to visit Ballycastle?
May and August typically offer the most optimal weather in Ballycastle. In contrast, January, February, March, November and December tend to have less optimal conditions.
What temperatures can I expect in Ballycastle?
Daytime highs range from 10°C (50°F) in January to 18°C (64°F) in August. Nighttime lows range from 5°C (41°F) to 13°C (55°F).
How much rain does Ballycastle get?
Annual rainfall is around 1479 mm (58 in). November is the wettest month with 155 mm (6.1 in), while May is the driest with 98 mm (3.9 in).
How sunny is Ballycastle?
Ballycastle receives around 1,309 hours of sunshine per year. May is the sunniest month with 193 hours, while December is the cloudiest with just 40 hours.
Ballycastle 3-Day Forecast
Ballycastle on the map
Ballycastle is highlighted - select any city to see its climate.
Popular this month
Where to go in August - average daytime high across popular destinations.
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