La Línea de la Concepción weather in September

In September, La Línea de la Concepción sees average daytime highs of 23°C and overnight lows near 20°C, with 32 mm of rain across 3.3 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 8th-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 66% of the time in September, and the air most often feels humid.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is La Línea de la Concepción's 4th-clearest and 9th-windiest month. For the whole year in context, see La Línea de la Concepción's year-round climate.

Daytime high
23°
3rd warmest
Overnight low
20°
10th coldest
Rainfall
32 mm
3.3 wet days
Daylight
12 h 12 min
7:09 AM – 7:22 PM
Cloud cover
33%
4th clearest
Wind
16 km/h
9th windiest
Solar energy
5.48 kWh/m²
Travel score
8.5
out of 10

La Línea de la Concepción is municipal capital of La Línea de la Concepción, Cádiz, Andalusia, Spain.

Air quality
Good
PM10 28.3 µg/m³ · 2015

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 La Línea de la Concepción reaches about 23°C in the afternoon and slips back to 20°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 21°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)
12521
22521
32421
42421
52421
62421
72421
82421
92421
102421
112421
122420
132420
142320
152320
162320
172320
182320
192320
202320
212320
222320
232320
242220
252219
262219
272219
282219
292219
302219

La Línea de la Concepción weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan15° / 12°899.49.84.7
Feb15° / 12°777.810.64.8
Mar16° / 13°777.911.75.5
Apr17° / 14°496.312.96.4
May20° / 16°243.813.97.6
Jun22° / 19°50.814.49.0
Jul25° / 21°10.114.29.5
Aug25° / 22°40.713.49.1
Sep23° / 20°323.312.28.5
Oct20° / 18°777.411.17.0
Nov17° / 15°948.710.16.0
Dec16° / 13°11410.19.65.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 66% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 19%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18812
28713
38713
48614
58614
68614
78416
88416
98416
108317
118218
128218
138119
148119
158020
168020
177921
187921
197822
207822
217822
227723
237723
247723
257624
267624
277624
287624
297525
307525

Chance of precipitation in September

Any precipitation

La Línea de la Concepción gets around 32 mm of rain over 3.3 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 11% and peaks near 17% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
15
25
35
45
56
66
76
87
97
107
118
129
139
1410
1510
1611
1711
1812
1913
2013
2114
2215
2315
2415
2516
2616
2716
2816
2916
3017

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 49% of days. Sticky, muggy-or-worse air turns up on roughly 37% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
10540523
20541513
30541522
40642492
51643482
61743472
71844461
81944451
91944441
1011044431
1111144421
1221245411
1321345401
1421345390
1521446380
1621446370
1721447360
1831548350
1931549330
2031550320
2131552300
2231652290
2331654270
2431655260
2531657240
2631658230
2731758220
2841759200
2941760190
3041860180

Wind in September

Winds average 16 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over September. Sunrise moves from 6:57 AM to 7:20 AM, and sunset from 7:45 PM to 7:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:577:45
212.86:587:44
312.76:597:42
412.76:597:41
512.77:007:39
612.67:017:38
712.67:027:36
812.57:037:35
912.57:037:33
1012.57:047:32
1112.47:057:30
1212.47:067:29
1312.37:077:27
1412.37:077:26
1512.37:087:24
1612.27:097:22
1712.27:107:21
1812.17:117:19
1912.17:117:18
2012.17:127:16
2112.07:137:15
2212.07:147:13
2312.07:157:12
2411.97:157:10
2511.97:167:09
2611.87:177:07
2711.87:187:06
2811.87:197:04
2911.77:207:02
3011.77:207:01

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.48 kWh/m².

For context, solar energy here swings from a low near 2.36 kWh/m² to a high of 7.81 kWh/m² in June across the year — September's 5.48 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.2Intense
36.2Intense
46.1Intense
56.1Intense
66.0Intense
76.0Bright
85.9Bright
95.9Bright
105.8Bright
115.8Bright
125.7Bright
135.6Bright
145.6Bright
155.5Bright
165.5Bright
175.4Bright
185.3Bright
195.3Bright
205.2Bright
215.2Bright
225.1Bright
235.1Bright
245.0Bright
255.0Bright
264.9Bright
274.9Bright
284.9Bright
294.8Bright
304.8Bright
Planning a trip in September

Hazard calendar for La Línea de la Concepción

In seasonPeak

None of La Línea de la Concepción's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

La Línea de la Concepción's rainy season runs October–March, 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 La Línea de la Concepción?

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

8.5
Sightseeing
4th-best month of the year
6.7
Beach & pool
3rd-best month of the year

September is one of the better times to visit La Línea de la Concepción for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for La Línea de la Concepción in September

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

In September, La Línea de la Concepción sees daytime highs around 23°C and nights near 20°C. Worth packing: light clothes and sun protection. About 3 days see rain.

light clothessun protection

Sea temperature near La Línea de la Concepción in September

The nearest coast averages about 21°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 22°C and coldest in February near 15°C.

It's comfortable for a long swim from Jul 5 to Sep 29 — about 2.9 months when the water holds above 20°C.

15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar15Cool
Apr16Cool
May17Cool
Jun19Cool
Jul21Refreshing
Aug22Refreshing
Sep21Refreshing
Oct19Cool
Nov18Cool
Dec17Cool

UV index in La Línea de la Concepción in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in La Línea de la Concepción peaks around July 17 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highHighModerateJul 17UV 10Dec 21UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar7High
Apr9Very high
May8Very high
Jun8Very high
Jul10Extreme
Aug8Very high
Sep7High
Oct5High
Nov3Moderate
Dec2Moderate

Air quality in La Línea de la Concepción in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in La Línea de la Concepción is worst in March — around 17 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (June, 10 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodMar 1616 µg/m³Jun 1410 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb14Moderate
Mar17Moderate
Apr14Moderate
May12Good
Jun10Good
Jul13Moderate
Aug13Moderate
Sep13Moderate
Oct13Moderate
Nov12Good
Dec11Good
Location & terrain

Where is La Línea de la Concepción?

La Línea de la Concepción sits at 36.2°N, 5.3°W, 4 m above sea level, in Spain. The nearest listed city is Gibraltar, 3.0 km away.

Topography around La Línea de la Concepción

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of La Línea de la Concepción.

Within 3 km, the terrain around La Línea de la Concepción has significant variations in elevation — a maximum elevation change of 299 m around an average of 13 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 598 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,887 m.

The land around La Línea de la Concepción is covered by water (46%) and artificial surfaces (30%) within 3 km, water (58%) and trees (20%) within 16 km, and water (43%) and trees (22%) within 80 km.

3 km
299 m
16 km
598 m
80 km
1,887 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Gibraltar 3.0 km · San Roque 6.0 km · Algeciras 10 km · Los Barrios 13 km · Tarifa 29 km · Ceuta 31 km · Estepona 34 km · Fnidek 35 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 La Línea de la Concepción (36.1681°, -5.3478°, elevation 4 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).