Santiago de Compostela Weather in September
Thinking of visiting Santiago de Compostela in September? Expect high temperatures reaching 23°C (73°F) during the day, dropping to 13°C (55°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in Santiago de Compostela in September
Historically, the month has about 12 days of rain, averaging 82 mm (3.2 in) in total. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.
Temperature in Santiago de Compostela in September
September is a perfect month in Santiago de Compostela, with 23°C (73°F) during the day and 13°C (55°F) at night. September marks the summer season. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights cool down to 13°C (55°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Santiago de Compostela in September
The area experiences a moderate amount of sunshine, with approximately 186 hours of sunlight expected. This means a decent mix of sun and overcast.If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Santiago de Compostela.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Spain, check out our Santiago de Compostela's climate page.
Santiago de Compostela Temperature in September
Min Temperature
13°C (55°F)
Max Temperature
23°C (73°F)
Chance of Rain
41%
Precipitation
82 mm (3.2 in)
Rainy days
12 days
Humidity
75%
Sunshine
186 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Santiago de Compostela typically stay consistent throughout September, with daily highs averaging around 23°C (73°F). Nights are cool, with lows typically ranging from 11°C (52°F) to 14°C (57°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Santiago de Compostela in September
Browse day-by-day weather records for Santiago de Compostela spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Santiago de Compostela historical weather extremes in September
The extremes listed below come from historical weather data collected in Santiago de Compostela from 1976 through 2025.
- The hottest September day on record in Santiago de Compostela reached 37°C (99°F) (September 5, 2006).
- The lowest daytime temperature in September was 12°C (54°F), recorded on September 19, 2000.
- Santiago de Compostela registered its coldest September night on September 30, 1982, with temperatures dropping to 4°C (39°F).
- The wettest day in September Santiago de Compostela was on September 24, 2006 with 55 mm (2.2 in) of precipitation.
Best Places in Spain in September
Find out more about the weather in Spain and which places have the best travel conditions in this month. See all of Spain in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Santiago de Compostela in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Santiago de Compostela in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Spain, check out our Santiago de Compostela's climate page.
Temperature Rainfall Sunshine Humidity
See the full Santiago de Compostela climate overview or explore weather in Spain.
