Olonne-sur-Mer Weather & Climate: Best Time to Visit

Visitors to Olonne-sur-Mer can expect significant temperature changes throughout the year. On average, daytime temperatures range from a comfortable 23°C (73°F) in August to a chilly 11°C (52°F) in January.

Nighttime temperatures range from 17°C (63°F) in August to 6°C (43°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Generally, Olonne-sur-Mer experiences moderate precipitation patterns, averaging 858 mm (34 in) yearly. The seasons in Olonne-sur-Mer bring significant changes in precipitation. The wettest month, November, receives high rainfall, with an average of 110 mm (4.3 in) of precipitation. This rainfall is distributed across 16 rainy days.

In contrast, the driest month, July, experiences much less rainfall, totaling 40 mm (1.6 in) over 10 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Olonne-sur-Mer Precipitation page.

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

The average number of days each month with precipitation

In Olonne-sur-Mer, summer days are longer and more sunny, with daily sunshine hours peaking at 9.1 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 2.5 hours per average day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The city experiences its highest humidity in December, reaching 88%. In July, the humidity drops to its lowest level at 76%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year