San Sebastian Weather in September
Spain · 30-year monthly averages
👍 Good time to visit
September in San Sebastian is pleasantly warm, with average daytime highs around 21°C (70°F) and nighttime lows near 15°C (59°F). Expect roughly 117mm of precipitation spread over about 11 rainy days, and this is one of the wetter months.
Avg high
21°C
70°F
Avg low
15°C
59°F
Rainfall
117mm
rainy
Rainy days
11
days with ≥1mm
☀️ About 185 hours of sunshine over the month (~6h/day).
🎒 What to pack
- light layers
- comfortable walking shoes
- compact umbrella or rain jacket
September vs the rest of the year
FAQ
- How hot is San Sebastian in September?
- September in San Sebastian is pleasantly warm, with average daytime highs around 21°C (70°F) and nighttime lows near 15°C (59°F). Expect roughly 117mm of precipitation spread over about 11 rainy days, and this is one of the wetter months.
- Does it rain a lot in San Sebastian in September?
- San Sebastian sees around 117mm of precipitation in September on average — rainy by global standards.
- Is September a good time to visit San Sebastian?
- September is a good month to visit San Sebastian, with generally agreeable conditions.