Weather in Donostia / San Sebastián in September
Donostia / San Sebastián, Spain averages a high of 21.8°C (71.2°F) and low of 15.5°C (59.9°F) in September, with 13 rain days and 9.9 hours of daily sunshine. Travel score: 76/100 (Good). The best time to visit Donostia / San Sebastián is July.
High
22°C71°F
Low
16°C60°F
🌧️
13
rain days
☀️
9.9
hrs/day sunshine
💧
79%
humidity
76— Good
September in Donostia / San Sebastián is mild and occasionally wet — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in Donostia / San Sebastián?
How much does it rain in Donostia / San Sebastián in September?
Donostia / San Sebastián receives an average of 99.4mm of rainfall across 13 rainy days in September. The annual total is 1447.5mm.
What should I pack for Donostia / San Sebastián in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 22°C
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Sunscreen SPF 30+
10 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Light rain jacket
Some rainy days expected (13 days)
☔
Umbrella
Be prepared for occasional showers
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Data based on 1994–2024 averages · Last updated: 2024-12-31