Sants weather in September

In September, Sants sees average daytime highs of 23°C and overnight lows near 21°C, with 78 mm of rain across 9.2 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 22°C by the end. The sky is clear or mostly clear about 49% of the time in September, and the air most often feels muggy.

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 Sants's 4th-clearest and 8th-windiest month. For the whole year in context, see Sants's year-round climate.

Daytime high
23°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
78 mm
9.2 wet days
Daylight
12 h 18 min
6:38 AM – 6:54 PM
Cloud cover
45%
4th clearest
Wind
13 km/h
8th windiest
Solar energy
4.52 kWh/m²
Travel score
7.2
out of 10

Sants is human settlement in Sants-Montjuïc, Barcelona, Barcelonès, Spain.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 24°C in the first days to 22°C by the end.

A typical September day in Sants reaches about 23°C in the afternoon and slips back to 21°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 25°C. Set against its neighbours, September runs about 2°C cooler than August and about 3°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12523
22522
32522
42422
52422
62422
72422
82422
92422
102422
112422
122421
132421
142421
152321
162321
172321
182321
192321
202321
212320
222320
232320
242320
252220
262220
272220
282220
292220
302220

Sants weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan13° / 10°486.59.43.9
Feb13° / 10°396.410.33.8
Mar14° / 11°385.811.74.4
Apr15° / 13°426.513.15.1
May18° / 16°37514.36.6
Jun22° / 20°263.814.98.0
Jul24° / 23°152.814.78.7
Aug25° / 23°365.313.78.1
Sep23° / 21°789.212.37.2
Oct20° / 18°9710.210.96.5
Nov16° / 14°688.19.75.6
Dec14° / 11°476.79.14.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 32%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17327
27327
37327
47129
57129
67129
77030
87030
97030
106931
116931
126931
136931
146832
156832
166832
176634
186634
196634
206634
216634
226634
236535
246535
256535
266634
276634
286535
296535
306535

Chance of precipitation in September

Any precipitation

Sants gets around 78 mm of rain over 9.2 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 30% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
126
227
327
428
528
628
729
829
929
1030
1130
1230
1331
1431
1532
1632
1733
1833
1933
2033
2133
2232
2332
2432
2531
2631
2731
2831
2931
3031

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 33% of days. Sticky, muggy-or-worse air turns up on roughly 42% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
129234224
2210244222
3211254320
4211254318
5312264316
6312264315
7313274314
8413274313
9414274212
10515284111
11616284010
12616293910
1371729389
1471830379
1581831358
1681932347
1792032327
18102033316
19102134296
20112135285
21112137274
22122238254
23122238243
24122239233
25132240223
26132241222
27142241212
28152241202
29152341201
30162341191

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2714light breeze
2814light breeze
2914light breeze
3014light 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 6:22 AM to 6:52 AM, and sunset from 7:20 PM to 6:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.06:227:20
212.96:237:19
312.96:247:17
412.86:257:15
512.86:267:13
612.76:277:12
712.76:287:10
812.66:297:08
912.66:307:06
1012.66:317:05
1112.56:327:03
1212.56:337:01
1312.46:346:59
1412.46:366:58
1512.36:376:56
1612.36:386:54
1712.26:396:52
1812.26:406:50
1912.16:416:49
2012.16:426:47
2112.06:436:45
2212.06:446:43
2311.96:456:41
2411.96:466:40
2511.86:476:38
2611.86:486:36
2711.86:496:34
2811.76:506:33
2911.76:516:31
3011.66:526:29

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.52 kWh/m².

For context, solar energy here swings from a low near 1.88 kWh/m² to a high of 7.06 kWh/m² in June across the year — September's 4.52 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.1Bright
45.0Bright
55.0Bright
65.0Bright
74.9Bright
84.9Bright
94.8Bright
104.8Bright
114.7Bright
124.7Bright
134.7Bright
144.6Bright
154.6Bright
164.5Bright
174.5Bright
184.4Bright
194.4Bright
204.3Bright
214.3Bright
224.3Bright
234.2Bright
244.2Bright
254.1Bright
264.1Bright
274.0Bright
284.0Bright
294.0Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Sants

In seasonPeak

In September, Sants sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Sants's rainy season runs September–January, when most of the year's rain falls.

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

Is September a good time to visit Sants?

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

7.2
Sightseeing
4th-best month of the year
5.8
Beach & pool
3rd-best month of the year

September is one of the better times to visit Sants for general sightseeing.

What to pack for Sants in September

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

In September, Sants sees daytime highs around 23°C and nights near 21°C. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Sants in September

The nearest coast averages about 24°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 20 km away) is warmest in August at about 25°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 11 to Oct 23 — about 4.4 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr14Bracing
May17Cool
Jun21Refreshing
Jul24Refreshing
Aug25Warm
Sep24Refreshing
Oct21Refreshing
Nov17Cool
Dec15Bracing

UV index in Sants 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 Sants peaks around July 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 14UV 9Dec 19UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr7High
May6High
Jun8Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Sants?

Sants sits at 41.4°N, 2.1°E, 45 m above sea level, in Spain. The nearest listed city is La Bordeta, 0.0 km away.

Topography around Sants

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

Within 3 km, the terrain around Sants has only modest variations in elevation — a maximum elevation change of 184 m around an average of 48 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 513 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,677 m.

The land around Sants is covered by artificial surfaces (82%) within 3 km, water (38%), artificial surfaces (26%) and trees (25%) within 16 km, and trees (40%) and water (34%) within 80 km.

3 km
184 m
16 km
513 m
80 km
1,677 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: La Bordeta 0.0 km · Hostafrancs 0.0 km · Sants - Badal 1.0 km · la Nova Esquerra de l'Eixample 1.0 km · Sants-Montjuïc 1.0 km · Barri de les Corts 1.0 km · Les Corts 2.0 km · la Marina de Port 2.0 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
Roman Catholic 58%atheist 16%agnostic 11%non-believer 11%

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 Sants (41.3743°, 2.1383°, elevation 45 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).