Weather in San Sebastián in September
September in San Sebastián is warm outdoor weather. Days are long enough to be useful. Shade starts to matter at midday.
In Spain, this is how San Sebastián actually wears September, not how a country centroid would. Compared with August and February, September sits in the middle of San Sebastián's year.
- Average temp
- 20°C
15–24°C
- Rainfall
- 146 mm
Showers likely
- Sunshine
- 6 h
hours per day
What to expect
Daytime
Warm days in San Sebastián in September. A hat starts to earn its keep at midday. Evenings are the comfortable part of the clock.
You can walk at more hours than in the fierce months. Still build in a pause when the sun is high. Nights are easy.
Rain
Mixed skies in San Sebastián in September. Dry days and wet days share the month. Outdoor plans need a backup, not a cancellation policy.
Pack a shell you will actually carry. The monthly table is the place for totals. This is the feel: usable, interrupted.
Evening
Evenings are cooler. A layer helps after sunset.
What to pack
Rain jacket
A layer for cooler evenings
Where to stay in San Sebastián
Dates are a starting point for September.
Travel guides for San Sebastián
What to read before you book.
Average weather in San Sebastián
TemperatureRainfall
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FAQs about San Sebastián
Climate averages for San Sebastián, 1991–2020.
The best time to visit San Sebastián is between May and October, the most comfortable stretch of the year on these averages.
August is the hottest month, with an average around 22°C.
November is the wettest month, with about 224 mm of rain.
No. These are 1991–2020 climate normals from Meteostat, not a live forecast. Actual weather in any given week can differ.
