San Sebastián Weather in September

Thinking of visiting San Sebastián in September? Expect high temperatures reaching 22°C (72°F) during the day, dropping to 16°C (61°F) at night, and note that quite a bit of rainfall is likely.

Rainfall in San Sebastián in September

On average, there are about 13 days with rain during this month, averaging 104 mm (4.1 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in San Sebastián in September

In September, San Sebastián gets high temperatures, with highs of 22°C (72°F). Nights cool to around 16°C (61°F). September is a notable month of the summer season. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights drop to around 16°C (61°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in San Sebastián in September

The area enjoys a moderate level of sunlight, with around 170 hours. It's a good balance between sunny and cloudy days.

If you prefer dry days with pleasant temperatures, June, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.