Saint Athan Weather & Climate: Best Time to Visit

The climate in Saint Athan experiences moderate temperature changes, with mild shifts between seasons. Average maximum daytime temperatures range from a pleasant 20°C (68°F) in August, the warmest time of the year, to a chilly 9°C (48°F) during cooler months like February.

At night, you can expect temperatures ranging from 14°C (57°F) in August to around 4°C (39°F) during February.

Check out our detailed temperature page for more information.

Temperature ranges by month

Saint Athan has a notably wet climate with abundant precipitation, recording 1159 mm (46 in) of rainfall per year. Year-round, Saint Athan has a balanced climate with minimal variation in precipitation. The difference between the wettest month, December, with 122 mm (4.8 in), and the driest month, March, with 78 mm (3.1 in), is minimal. For more details, please visit our Saint Athan Precipitation page.

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

The average number of days each month with precipitation

Seasonal changes in sunshine hours are quite dramatic in Saint Athan. While July receives considerable daily sunshine with up to 6.7 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.6 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 mean water temperature over the year ranges from 7°C (45°F) in February to 16°C (61°F) in August.

Water temperature over the year

The city experiences its highest humidity in January, reaching 89%. In June, the humidity drops to its lowest level at 73%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year

The mean wind speed over the year ranges from 4 m/s (8 knots) in May, June, July, August and September to 5 m/s (10 knots) in January, February, March, April, October, November and December. What does this mean?

The mean monthly wind speed over the year (meters per second)