September · Spain
Best time to visit Santiago de Compostela in September Weather, crowds & prices
Weather in Santiago de Compostela in September
Average temperature 18°C, 107 mm of rain, about 16 days with 6+ hours of sunshine and 77% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
7.3/10
Ranked #6 of 12 months
- Avg temp
- 18°C
- Rainfall
- 107 mm
- Humidity
- 77%
- Days with 6h+ sun
- 16
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Santiago de Compostela scores 7.3/10 for sightseeing and cultural travel - an above-average month (#6 of 12). Expect around 18°C, 107 mm of rain, and roughly 16 days with 6+ hours of sunshine this month.
Santiago de Compostela crowns the Camino with granite cathedral squares, pilgrim rituals, and Galician seafood markets. Best window: late spring through early autumn.
September in Santiago de Compostela — reliably good (6th best month)
September averages 18°C (65°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
At 107 mm this is a genuinely wet month: about 16 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 7.3/10 here, 6th of 12 months, against 9.8/10 in the destination's best month.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
Plan for mid-season pricing, with crowds are moderate.
Flexible dates? July scores 2.5 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Santiago de Compostela in September?
- In September, Santiago de Compostela averages 18°C, 107 mm of rain, and about 16 days with 6+ hours of sunshine. Its climate-comfort score is 7.3/10.
- Is September a good time to visit Santiago de Compostela?
- September earns a 7.3/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Santiago de Compostela in September?
- Expect about 107 mm of rain in September. Average humidity is 77% and there are about 16 days with 6+ hours of sunshine.
Curated in Santiago de Compostela
Tickets & experiences
Things to do in Santiago de Compostela
Santiago de Compostela, Spain. Live activities and tours from GetYourGuide, matched to this destination.