Arenys de Mar weather in September

In September, Arenys de Mar sees average daytime highs of 23°C and overnight lows near 19°C, with 86 mm of rain across 11 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 21°C by the end. The sky is clear or mostly clear about 42% of the time in September, and the air most often feels humid.

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 Arenys de Mar's 7th-clearest and 8th-windiest month. For the whole year in context, see Arenys de Mar's year-round climate.

Daytime high
23°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
86 mm
11 wet days
Daylight
12 h 18 min
6:36 AM – 6:52 PM
Cloud cover
49%
7th clearest
Wind
12 km/h
8th windiest
Solar energy
4.29 kWh/m²
Travel score
6.8
out of 10

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 21°C by the end.

A typical September day in Arenys de Mar reaches about 23°C in the afternoon and slips back to 19°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 20°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)
12421
22421
32421
42421
52421
62421
72420
82320
92320
102320
112320
122320
132320
142320
152319
162319
172319
182219
192219
202219
212219
222219
232219
242219
252218
262218
272118
282118
292118
302118

Arenys de Mar 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
Jan12° / 5279.33.5
Feb12° / 477.210.33.5
Mar13° / 10°477.311.74.2
Apr15° / 12°558.513.14.8
May18° / 15°487.814.36.2
Jun22° / 19°395.8157.5
Jul24° / 21°315.214.78.2
Aug25° / 22°436.913.77.7
Sep23° / 19°861112.36.8
Oct19° / 16°10710.910.96.2
Nov15° / 12°7499.75.0
Dec13° / 53793.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 38%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16634
26535
36535
46436
56436
66436
76436
86337
96337
106436
116337
126337
136238
146238
156238
166238
176139
186040
196040
206040
216040
226040
235941
245941
255941
266040
276040
286040
296040
306040

Chance of precipitation in September

Any precipitation

Arenys de Mar gets around 86 mm of rain over 11 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 36% and peaks near 39% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
133
234
335
435
535
635
736
836
936
1036
1136
1236
1337
1437
1537
1638
1738
1838
1939
2039
2138
2238
2338
2437
2537
2637
2736
2836
2936
3035

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 34% of days. Sticky, muggy-or-worse air turns up on roughly 31% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1215293716
2216303714
3317313712
4317323810
531832389
641933387
751933386
852033375
962033374
1072133363
1172233353
1282333352
1382333342
1492433322
15102533311
16102633301
17112633281
18122734261
19132834251
20132834231
21142935221
22152936201
23152936191
24162937171
25162938161
26172938151
27182939141
28182939130
29192939120
30202939120

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm

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 6:20 AM to 6:51 AM, and sunset from 7:19 PM to 6:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.06:207:19
212.96:217:17
312.96:227:15
412.86:237:14
512.86:247:12
612.76:257:10
712.76:267:08
812.76:277:07
912.66:297:05
1012.66:307:03
1112.56:317:01
1212.56:327:00
1312.46:336:58
1412.46:346:56
1512.36:356:54
1612.36:366:52
1712.26:376:51
1812.26:386:49
1912.16:396:47
2012.16:406:45
2112.06:416:43
2212.06:426:42
2311.96:436:40
2411.96:446:38
2511.86:456:36
2611.86:476:34
2711.76:486:33
2811.76:496:31
2911.76:506:29
3011.66:516:27

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.29 kWh/m².

For context, solar energy here swings from a low near 1.82 kWh/m² to a high of 6.75 kWh/m² in June across the year — September's 4.29 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
15.0Bright
24.9Bright
34.8Bright
44.8Bright
54.8Bright
64.7Bright
74.7Bright
84.6Bright
94.6Bright
104.5Bright
114.5Bright
124.5Bright
134.4Bright
144.4Bright
154.3Bright
164.3Bright
174.3Bright
184.2Bright
194.2Bright
204.1Bright
214.1Bright
224.0Bright
234.0Bright
244.0Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.8Moderate
293.8Moderate
303.7Moderate
Planning a trip in September

Is September a good time to visit Arenys de Mar?

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

6.8
Sightseeing
4th-best month of the year
5.1
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Arenys de Mar for sightseeing.

What to pack for Arenys de Mar in September

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

In September, Arenys de Mar sees daytime highs around 23°C and nights near 19°C. Worth packing: light clothes and rain gear. About 11 days see rain.

light clothesrain gear

Sea temperature near Arenys de Mar in September

The nearest coast averages about 23°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 25°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 14 to Oct 18 — about 4.2 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb13Bracing
Mar13Bracing
Apr14Bracing
May17Cool
Jun20Refreshing
Jul23Refreshing
Aug25Warm
Sep23Refreshing
Oct20Refreshing
Nov17Cool
Dec15Bracing

UV index in Arenys de Mar 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 Arenys de Mar peaks around July 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 20UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr7High
May6High
Jun8Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Arenys de Mar?

Arenys de Mar sits at 41.6°N, 2.5°E, 25 m above sea level, in Spain. The nearest listed city is Calella, 9.0 km away.

Topography around Arenys de Mar

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

Within 3 km, the terrain around Arenys de Mar has significant variations in elevation — a maximum elevation change of 291 m around an average of 68 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 764 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,751 m.

The land around Arenys de Mar is covered by water (37%) and trees (31%) within 3 km, water (46%) and trees (41%) within 16 km, and trees (46%) and water (34%) within 80 km.

3 km
291 m
16 km
764 m
80 km
1,751 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Calella 9.0 km · Mataró 10 km · Pineda de Mar 13 km · Sant Celoni 13 km · Vilassar de Mar 16 km · Cardedeu 17 km · Malgrat de Mar 18 km · Premià de Mar 18 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 Arenys de Mar (41.5819°, 2.5494°, elevation 25 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).