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Achill Sound Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Achill Sound.
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Climate overview of Achill Sound
The climate in Achill Sound, 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 has a wet climate, receiving around 1446 mm (57 in) of rainfall per year. December is the wettest month. Sunshine peaks in May, when the city sees around 6.4 hours of sunshine per day.
Achill Sound Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Achill Sound - and find the best time to visit.
Monthly Temperature in Achill Sound
The weather in Achill Sound changes moderately throughout the year, offering enough variation to appreciate each season. On average, daytime temperatures range from a moderate 18°C (64°F) in August to a chilly 10°C (50°F) in January.
Nighttime temperatures range from 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
Rainfall in Achill Sound
Achill Sound experiences significant rainfall throughout the year, averaging 1446 mm (57 in) of precipitation annually. The amount of precipitation varies moderately throughout the year. The wettest month, December, sees around 154 mm (6.1 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, May, still receives a respectable 92 mm (3.6 in) of rainfall. For more details, please visit our Achill Sound 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 Achill Sound
In Achill Sound, summer days are longer and more sunny, with daily sunshine hours peaking at 6.4 hours in May. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 1.3 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Belmullet, Ireland (34 KM, 21 Miles).
Daily hours of sunshine
Data from: Belmullet, Ireland (34 KM, 21 Miles).
Daily percentage of sunshine
Data from: Belmullet, Ireland (34 KM, 21 Miles).
Humidity in Achill Sound by Month
The relative humidity is high throughout the year in Achill Sound.
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 (34 KM, 21 Miles).
Best Time to Visit Achill Sound
For the most comfortable conditions available during the year, consider visiting Achill Sound in May, June, July and August. Conditions are usually least comfortable in January, February, March, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
wet
Feb
wet
Mar
wet
Apr
mixed
May
good
Jun
good
Jul
good
Aug
good
Sep
mixed
Oct
mixed
Nov
wet
Dec
wet
- Best overall: May, June, July and August
- Warmest weather: June, July, August and September
- Most sunshine: May
Frequently asked questions about the climate in Achill Sound
What is the best time to visit Achill Sound?
May, June, July and August typically offer the most optimal weather in Achill Sound. In contrast, January, February, March, November and December tend to have less optimal conditions.
What temperatures can I expect in Achill Sound?
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 Achill Sound get?
Annual rainfall is around 1446 mm (57 in). December is the wettest month with 154 mm (6.1 in), while May is the driest with 92 mm (3.6 in).
How sunny is Achill Sound?
Achill Sound 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.
Achill Sound 3-Day Forecast
Achill Sound on the map
Achill Sound is highlighted - select any city to see its climate.
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