San Sebastián Weather & Climate: Best Time to Visit

Visitors to San Sebastián can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 24°C (75°F) in August, the warmest time of the year, to a moderate 12°C (54°F) during cooler months like February.

At night, you can expect temperatures ranging from 18°C (64°F) in August to around 7°C (45°F) during February.

Check out our detailed temperature page for more information.

Temperature ranges by month

San Sebastián is known for its substantial rainfall, with annual precipitation reaching 1500 mm (59 in). While rainfall varies throughout the year, each season offers its own charm. November brings wetter days averaging 184 mm (7.2 in) of precipitation, spread over 17 rainy days.

In contrast, the driest month July experiences a drier climate, with about 85 mm (3.3 in) of rainfall spread across 12 rainy days. For more details, please visit our San Sebastián 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 San Sebastián. While July receives considerable daily sunshine with up to 6.6 hours, December marks the darkest time of the year, where sunshine is scarce with only 2.7 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in San Sebastián.

The city experiences its highest humidity in November, reaching 76%. In March, the humidity drops to its lowest level at 70%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year