Santiago de Compostela weather in September

In September, Santiago de Compostela sees average daytime highs of 21°C and overnight lows near 13°C, with 69 mm of rain across 9.1 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 20°C by the end. The sky is clear or mostly clear about 33% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Santiago de Compostela's 3rd-clearest and 12th-windiest month. For the whole year in context, see Santiago de Compostela's year-round climate.

Daytime high: 21°; 3rd warmest
Overnight low: 13°; 10th coldest
Rainfall: 69 mm; 9.1 wet days
Daylight: 12 h 18 min; 7:20 AM – 7:37 PM
Cloud cover: 55%; 3rd clearest
Wind: 12 km/h; 12th windiest
Solar energy: 4.3 kWh/m²
Travel score: 6.7; out of 10

Santiago de Compostela is city in Spain.

Air quality: Good; PM2.5 9.7 µg/m³ · 2019

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← August Santiago de Compostela year-round climate October →Best places to visit in September

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 22°C in the first days to 20°C by the end.

A typical September day in Santiago de Compostela reaches about 21°C in the afternoon and slips back to 13°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 26°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	22	22	22	22	22	22	22	22	22	22	22	22	21	21	21	21	21	21	21	21	20	20	20	20	20	20	20	20	20	20
Avg low (°C)	14	14	14	14	14	14	14	14	14	13	13	13	13	13	13	13	13	13	13	13	13	13	13	12	12	12	12	12	12	12

	Avg high (°C)	Avg low (°C)
1	22	14
2	22	14
3	22	14
4	22	14
5	22	14
6	22	14
7	22	14
8	22	14
9	22	14
10	22	13
11	22	13
12	22	13
13	21	13
14	21	13
15	21	13
16	21	13
17	21	13
18	21	13
19	21	13
20	21	13
21	20	13
22	20	13
23	20	13
24	20	12
25	20	12
26	20	12
27	20	12
28	20	12
29	20	12
30	20	12

Santiago de Compostela weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 9th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	11° / 6°	141	13.9	9.2	2.5
Feb	12° / 6°	100	11.6	10.2	3.0
Mar	14° / 7°	106	12.1	11.6	3.9
Apr	15° / 8°	115	14.4	13.1	4.1
May	18° / 10°	92	13.1	14.4	5.2
Jun	20° / 12°	54	8.7	15.1	6.5
Jul	22° / 14°	30	5.9	14.8	7.5
Aug	23° / 14°	44	7.2	13.8	7.4
Sep	21° / 13°	69	9.1	12.3	6.7
Oct	18° / 11°	140	13.5	10.8	5.2
Nov	14° / 8°	151	15.3	9.5	3.5
Dec	12° / 6°	142	13.8	8.9	2.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 51%. Skies tend to cloud over as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	57	57	57	57	56	55	55	54	53	52	52	50	50	49	48	47	47	47	46	46	46	46	44	44	44	43	43	42	42	42
Cloudier (%)	43	43	43	43	44	45	45	46	47	48	48	50	50	51	52	53	53	53	54	54	54	54	56	56	56	57	57	58	58	58

	Clearer (%)	Cloudier (%)
1	57	43
2	57	43
3	57	43
4	57	43
5	56	44
6	55	45
7	55	45
8	54	46
9	53	47
10	52	48
11	52	48
12	50	50
13	50	50
14	49	51
15	48	52
16	47	53
17	47	53
18	47	53
19	46	54
20	46	54
21	46	54
22	46	54
23	44	56
24	44	56
25	44	56
26	43	57
27	43	57
28	42	58
29	42	58
30	42	58

Chance of precipitation in September

Any precipitation

Santiago de Compostela gets around 69 mm of rain over 9.1 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 31% and peaks near 34% on the wettest days. The odds climb toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	24	24	25	25	25	26	26	27	28	29	30	30	31	32	33	33	33	34	34	34	34	34	34	34	34	34	34	34	34	34

	Rain chance (%)
1	24
2	24
3	25
4	25
5	25
6	26
7	26
8	27
9	28
10	29
11	30
12	30
13	31
14	32
15	33
16	33
17	33
18	34
19	34
20	34
21	34
22	34
23	34
24	34
25	34
26	34
27	34
28	34
29	34
30	34

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the comfortable band about 46% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	26	26	27	28	28	29	30	31	32	33	34	35	37	38	39	40	42	43	44	45	46	46	47	48	49	50	51	51	52	55
Comfortable (%)	50	51	50	50	51	50	49	49	49	48	47	47	46	46	45	45	44	44	44	44	44	43	43	43	43	42	41	41	40	38
Humid (%)	24	23	23	22	21	21	20	20	19	19	19	18	17	17	16	15	14	13	12	11	11	10	10	9	9	8	8	8	8	7

	Dry (%)	Comfortable (%)	Humid (%)
1	26	50	24
2	26	51	23
3	27	50	23
4	28	50	22
5	28	51	21
6	29	50	21
7	30	49	20
8	31	49	20
9	32	49	19
10	33	48	19
11	34	47	19
12	35	47	18
13	37	46	17
14	38	46	17
15	39	45	16
16	40	45	15
17	42	44	14
18	43	44	13
19	44	44	12
20	45	44	11
21	46	44	11
22	46	43	10
23	47	43	10
24	48	43	9
25	49	43	9
26	50	42	8
27	51	41	8
28	51	41	8
29	52	40	8
30	55	38	7

Wind in September

Winds average 12 km/h in September, the calmest month.

Across September, daily wind ranges from about 12 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	12	light breeze
2	12	light breeze
3	12	light breeze
4	12	light breeze
5	12	light breeze
6	12	light breeze
7	12	light breeze
8	12	light breeze
9	12	light breeze
10	12	calm
11	12	calm
12	12	calm
13	12	calm
14	12	calm
15	12	calm
16	12	calm
17	12	calm
18	12	calm
19	12	calm
20	12	calm
21	12	calm
22	12	calm
23	12	light breeze
24	12	light breeze
25	12	light breeze
26	12	light breeze
27	12	light breeze
28	12	light breeze
29	12	light breeze
30	12	light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over September. Sunrise moves from 7:03 AM to 7:36 AM, and sunset from 8:05 PM to 7:11 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	13.0	13.0	12.9	12.9	12.8	12.8	12.7	12.7	12.6	12.6	12.5	12.5	12.4	12.4	12.3	12.3	12.2	12.2	12.1	12.1	12.0	12.0	11.9	11.9	11.8	11.8	11.7	11.7	11.6	11.6
Sunrise (AM)	7:03	7:04	7:05	7:06	7:08	7:09	7:10	7:11	7:12	7:13	7:14	7:15	7:17	7:18	7:19	7:20	7:21	7:22	7:23	7:24	7:26	7:27	7:28	7:29	7:30	7:31	7:32	7:34	7:35	7:36
Sunset (PM)	8:05	8:03	8:01	7:59	7:57	7:56	7:54	7:52	7:50	7:48	7:46	7:45	7:43	7:41	7:39	7:37	7:35	7:33	7:32	7:30	7:28	7:26	7:24	7:22	7:20	7:18	7:17	7:15	7:13	7:11

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	13.0	7:03	8:05
2	13.0	7:04	8:03
3	12.9	7:05	8:01
4	12.9	7:06	7:59
5	12.8	7:08	7:57
6	12.8	7:09	7:56
7	12.7	7:10	7:54
8	12.7	7:11	7:52
9	12.6	7:12	7:50
10	12.6	7:13	7:48
11	12.5	7:14	7:46
12	12.5	7:15	7:45
13	12.4	7:17	7:43
14	12.4	7:18	7:41
15	12.3	7:19	7:39
16	12.3	7:20	7:37
17	12.2	7:21	7:35
18	12.2	7:22	7:33
19	12.1	7:23	7:32
20	12.1	7:24	7:30
21	12.0	7:26	7:28
22	12.0	7:27	7:26
23	11.9	7:28	7:24
24	11.9	7:29	7:22
25	11.8	7:30	7:20
26	11.8	7:31	7:18
27	11.7	7:32	7:17
28	11.7	7:34	7:15
29	11.6	7:35	7:13
30	11.6	7:36	7:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.3 kWh/m².

For context, solar energy here swings from a low near 1.34 kWh/m² to a high of 6.31 kWh/m² in July across the year — September's 4.3 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	5.0	5.0	4.9	4.9	4.8	4.8	4.8	4.7	4.6	4.6	4.5	4.5	4.4	4.4	4.3	4.2	4.2	4.1	4.1	4.0	4.0	3.9	3.8	3.8	3.7	3.7	3.6	3.6	3.5	3.5
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	5.0	Bright
2	5.0	Bright
3	4.9	Bright
4	4.9	Bright
5	4.8	Bright
6	4.8	Bright
7	4.8	Bright
8	4.7	Bright
9	4.6	Bright
10	4.6	Bright
11	4.5	Bright
12	4.5	Bright
13	4.4	Bright
14	4.4	Bright
15	4.3	Bright
16	4.2	Bright
17	4.2	Bright
18	4.1	Bright
19	4.1	Bright
20	4.0	Bright
21	4.0	Moderate
22	3.9	Moderate
23	3.8	Moderate
24	3.8	Moderate
25	3.7	Moderate
26	3.7	Moderate
27	3.6	Moderate
28	3.6	Moderate
29	3.5	Moderate
30	3.5	Moderate

Planning a trip in September

Is September a good time to visit Santiago de Compostela?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.7

Sightseeing

3rd-best month of the year

4.1

Beach & pool

3rd-best month of the year

September is a reasonable time to visit Santiago de Compostela for sightseeing.

What to pack for Santiago de Compostela in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Santiago de Compostela sees daytime highs around 21°C and nights near 13°C. Worth packing: rain gear. About 9 days see rain.

rain gear

Sea temperature near Santiago de Compostela in September

The nearest coast averages about 17°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 47 km away) is warmest in August at about 17°C and coldest in February near 13°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	14	13	13	14	15	16	17	17	17	16	15	14
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Cool	Cool	Cool	Cool	Bracing

	Sea temperature (°C)	Comfort
Jan	14	Bracing
Feb	13	Bracing
Mar	13	Bracing
Apr	14	Bracing
May	15	Bracing
Jun	16	Cool
Jul	17	Cool
Aug	17	Cool
Sep	17	Cool
Oct	16	Cool
Nov	15	Cool
Dec	14	Bracing

UV index in Santiago de Compostela in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Santiago de Compostela peaks around July 15 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	2	5	6	7	8	9	8	6	4	2	1
Level	Low	Moderate	Moderate	High	High	Very high	Very high	Very high	High	Moderate	Low	Low

	UV index (midday)	Level
Jan	2	Low
Feb	2	Moderate
Mar	5	Moderate
Apr	6	High
May	7	High
Jun	8	Very high
Jul	9	Very high
Aug	8	Very high
Sep	6	High
Oct	4	Moderate
Nov	2	Low
Dec	1	Low

Location & terrain

Where is Santiago de Compostela?

Santiago de Compostela sits at 42.9°N, 8.5°W, 257 m above sea level, in Spain. The nearest listed city is Teo, 10 km away.

Topography around Santiago de Compostela

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santiago de Compostela.

Within 3 km, the terrain around Santiago de Compostela has significant variations in elevation — a maximum elevation change of 332 m around an average of 265 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 519 m; within 80 km, large variations in elevation — a maximum elevation change of 1,174 m.

The land around Santiago de Compostela is covered by trees (48%), artificial surfaces (29%) and grassland (22%) within 3 km, trees (64%) and grassland (24%) within 16 km, and trees (45%), water (30%) and grassland (21%) within 80 km.

3 km

332 m

trees 48%

16 km

519 m

trees 64%

80 km

1,174 m

trees 45%

treesshrubsgrasslandcroplandartificial surfaceswater

← August Santiago de Compostela year-round climate October →Best places to visit in September

September weather nearby: Teo 10 km · Ribeira 18 km · A Estrada 22 km · Vilagarcía de Arousa 36 km · Boiro 38 km · Carballo 39 km · Lalín 43 km · Culleredo 47 km

Spain travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / F; 230 V · 50 Hz
Prices: ≈ 65% of US; price level, 2025
GDP per capita: $38,627; 2025
Happiness: 6.5 / 10; World Happiness, 2025
Safe drinking water: 99%; of population, 2024
Homicide rate: 0.7; per 100k, 2023
Road deaths: 3.9; per 100k/yr, 2019
Income group: High; World Bank
English: Moderate; EF EPI 540
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Santiago de Compostela (42.8805°, -8.5457°, elevation 257 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	22	14
2	22	14
3	22	14
4	22	14
5	22	14
6	22	14
7	22	14
8	22	14
9	22	14
10	22	13
11	22	13
12	22	13
13	21	13
14	21	13
15	21	13
16	21	13
17	21	13
18	21	13
19	21	13
20	21	13
21	20	13
22	20	13
23	20	13
24	20	12
25	20	12
26	20	12
27	20	12
28	20	12
29	20	12
30	20	12

	Clearer (%)	Cloudier (%)
1	57	43
2	57	43
3	57	43
4	57	43
5	56	44
6	55	45
7	55	45
8	54	46
9	53	47
10	52	48
11	52	48
12	50	50
13	50	50
14	49	51
15	48	52
16	47	53
17	47	53
18	47	53
19	46	54
20	46	54
21	46	54
22	46	54
23	44	56
24	44	56
25	44	56
26	43	57
27	43	57
28	42	58
29	42	58
30	42	58

	Rain chance (%)
1	24
2	24
3	25
4	25
5	25
6	26
7	26
8	27
9	28
10	29
11	30
12	30
13	31
14	32
15	33
16	33
17	33
18	34
19	34
20	34
21	34
22	34
23	34
24	34
25	34
26	34
27	34
28	34
29	34
30	34

	Dry (%)	Comfortable (%)	Humid (%)
1	26	50	24
2	26	51	23
3	27	50	23
4	28	50	22
5	28	51	21
6	29	50	21
7	30	49	20
8	31	49	20
9	32	49	19
10	33	48	19
11	34	47	19
12	35	47	18
13	37	46	17
14	38	46	17
15	39	45	16
16	40	45	15
17	42	44	14
18	43	44	13
19	44	44	12
20	45	44	11
21	46	44	11
22	46	43	10
23	47	43	10
24	48	43	9
25	49	43	9
26	50	42	8
27	51	41	8
28	51	41	8
29	52	40	8
30	55	38	7

	Avg high (°C)	Avg low (°C)
1	22	14
2	22	14
3	22	14
4	22	14
5	22	14
6	22	14
7	22	14
8	22	14
9	22	14
10	22	13
11	22	13
12	22	13
13	21	13
14	21	13
15	21	13
16	21	13
17	21	13
18	21	13
19	21	13
20	21	13
21	20	13
22	20	13
23	20	13
24	20	12
25	20	12
26	20	12
27	20	12
28	20	12
29	20	12
30	20	12

	Clearer (%)	Cloudier (%)
1	57	43
2	57	43
3	57	43
4	57	43
5	56	44
6	55	45
7	55	45
8	54	46
9	53	47
10	52	48
11	52	48
12	50	50
13	50	50
14	49	51
15	48	52
16	47	53
17	47	53
18	47	53
19	46	54
20	46	54
21	46	54
22	46	54
23	44	56
24	44	56
25	44	56
26	43	57
27	43	57
28	42	58
29	42	58
30	42	58

	Rain chance (%)
1	24
2	24
3	25
4	25
5	25
6	26
7	26
8	27
9	28
10	29
11	30
12	30
13	31
14	32
15	33
16	33
17	33
18	34
19	34
20	34
21	34
22	34
23	34
24	34
25	34
26	34
27	34
28	34
29	34
30	34

	Dry (%)	Comfortable (%)	Humid (%)
1	26	50	24
2	26	51	23
3	27	50	23
4	28	50	22
5	28	51	21
6	29	50	21
7	30	49	20
8	31	49	20
9	32	49	19
10	33	48	19
11	34	47	19
12	35	47	18
13	37	46	17
14	38	46	17
15	39	45	16
16	40	45	15
17	42	44	14
18	43	44	13
19	44	44	12
20	45	44	11
21	46	44	11
22	46	43	10
23	47	43	10
24	48	43	9
25	49	43	9
26	50	42	8
27	51	41	8
28	51	41	8
29	52	40	8
30	55	38	7

	Avg high (°C)	Avg low (°C)
1	22	14
2	22	14
3	22	14
4	22	14
5	22	14
6	22	14
7	22	14
8	22	14
9	22	14
10	22	13
11	22	13
12	22	13
13	21	13
14	21	13
15	21	13
16	21	13
17	21	13
18	21	13
19	21	13
20	21	13
21	20	13
22	20	13
23	20	13
24	20	12
25	20	12
26	20	12
27	20	12
28	20	12
29	20	12
30	20	12

	Clearer (%)	Cloudier (%)
1	57	43
2	57	43
3	57	43
4	57	43
5	56	44
6	55	45
7	55	45
8	54	46
9	53	47
10	52	48
11	52	48
12	50	50
13	50	50
14	49	51
15	48	52
16	47	53
17	47	53
18	47	53
19	46	54
20	46	54
21	46	54
22	46	54
23	44	56
24	44	56
25	44	56
26	43	57
27	43	57
28	42	58
29	42	58
30	42	58

	Rain chance (%)
1	24
2	24
3	25
4	25
5	25
6	26
7	26
8	27
9	28
10	29
11	30
12	30
13	31
14	32
15	33
16	33
17	33
18	34
19	34
20	34
21	34
22	34
23	34
24	34
25	34
26	34
27	34
28	34
29	34
30	34

	Dry (%)	Comfortable (%)	Humid (%)
1	26	50	24
2	26	51	23
3	27	50	23
4	28	50	22
5	28	51	21
6	29	50	21
7	30	49	20
8	31	49	20
9	32	49	19
10	33	48	19
11	34	47	19
12	35	47	18
13	37	46	17
14	38	46	17
15	39	45	16
16	40	45	15
17	42	44	14
18	43	44	13
19	44	44	12
20	45	44	11
21	46	44	11
22	46	43	10
23	47	43	10
24	48	43	9
25	49	43	9
26	50	42	8
27	51	41	8
28	51	41	8
29	52	40	8
30	55	38	7