Loulé weather in September

In September, Loulé sees average daytime highs of 28°C and overnight lows near 17°C, with 26 mm of rain across 3.7 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 30°C in the first days to 26°C by the end. The sky is clear or mostly clear about 63% of the time in September, and the air most often feels dry.

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 Loulé's 4th-clearest and 12th-windiest month. For the whole year in context, see Loulé's year-round climate.

Daytime high
28°
4th warmest
Overnight low
17°
10th coldest
Rainfall
26 mm
3.7 wet days
Daylight
12 h 12 min
6:19 AM – 6:33 PM
Cloud cover
33%
4th clearest
Wind
12 km/h
12th windiest
Solar energy
5.56 kWh/m²
Travel score
7.4
out of 10

Loulé is human settlement in Portugal.

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 30°C in the first days to 26°C by the end.

A typical September day in Loulé reaches about 28°C in the afternoon and slips back to 17°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 32°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13018
23018
33018
43018
52918
62917
72917
82917
92917
102917
112817
122817
132817
142817
152817
162817
172716
182716
192716
202716
212716
222716
232616
242616
252616
262616
272615
282615
292615
302615

How September really feels in Loulé

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Loulé weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan14° / 487.39.74.6
Feb15° / 465.610.65.3
Mar18° / 567.411.76.4
Apr20° / 10°537.412.96.8
May24° / 13°386.5147.7
Jun28° / 16°101.914.57.6
Jul32° / 18°10.314.35.8
Aug31° / 18°30.513.45.8
Sep28° / 17°263.712.37.4
Oct23° / 14°657.1117.3
Nov18° / 10°647.3106.2
Dec15° / 757.69.54.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 63% 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 22%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
19010
28911
38812
48812
58713
68614
78416
88416
98317
108218
118119
128020
137921
147921
157723
167723
177624
187624
197525
207426
217327
227327
237228
247228
257129
267030
277030
286931
296931
306931

Chance of precipitation in September

Any precipitation

Loulé gets around 26 mm of rain over 3.7 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 12% and peaks near 17% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
13
24
34
44
55
66
76
87
98
108
119
1210
1311
1412
1512
1613
1714
1814
1915
2016
2116
2216
2317
2417
2517
2617
2717
2816
2917
3017

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 50% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14641121
24641121
34641121
44740121
54740121
64839121
74838131
84937131
94937131
104936131
115035132
125035142
135034142
145033152
155033152
165032162
175032162
185031172
195031172
205031182
215130181
225130181
235030191
245030191
255129191
265129191
275228191
285328181
295328181
305427181

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.

051015151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm

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 6:07 AM to 6:31 AM, and sunset from 6:57 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:076:57
212.86:086:55
312.86:086:54
412.76:096:52
512.76:106:51
612.66:116:49
712.66:126:48
812.66:136:46
912.56:136:45
1012.56:146:43
1112.46:156:41
1212.46:166:40
1312.46:176:38
1412.36:186:37
1512.36:196:35
1612.26:196:33
1712.26:206:32
1812.26:216:30
1912.16:226:29
2012.16:236:27
2112.06:246:25
2212.06:246:24
2311.96:256:22
2411.96:266:21
2511.96:276:19
2611.86:286:18
2711.86:296:16
2811.76:306:14
2911.76:316:13
3011.76:316:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.56 kWh/m².

For context, solar energy here swings from a low near 2.26 kWh/m² to a high of 7.93 kWh/m² in July across the year — September's 5.56 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.4Intense
26.3Intense
36.3Intense
46.2Intense
56.2Intense
66.1Intense
76.1Intense
86.0Intense
96.0Bright
105.9Bright
115.8Bright
125.8Bright
135.7Bright
145.7Bright
155.6Bright
165.5Bright
175.5Bright
185.4Bright
195.3Bright
205.3Bright
215.2Bright
225.2Bright
235.1Bright
245.1Bright
255.0Bright
265.0Bright
274.9Bright
284.9Bright
294.8Bright
304.8Bright
Planning a trip in September

Is September a good time to visit Loulé?

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

7.4
Sightseeing
3rd-best month of the year
8.1
Beach & pool
4th-best month of the year

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

What to pack for Loulé in September

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

In September, Loulé sees daytime highs around 28°C and nights near 17°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.

light clothessun protection

Sea temperature near Loulé 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 21°C and coldest in February near 15°C.

It's comfortable for a long swim from Jul 18 to Oct 2 — about 2.5 months when the water holds above 20°C.

14°16°18°20°22°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar15Cool
Apr16Cool
May17Cool
Jun19Cool
Jul20Refreshing
Aug21Refreshing
Sep21Refreshing
Oct20Cool
Nov18Cool
Dec17Cool

UV index in Loulé 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 Loulé peaks around July 14 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 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 14UV 10Dec 19UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar7High
Apr8Very high
May7Very high
Jun9Very high
Jul10Extreme
Aug9Very high
Sep7High
Oct5High
Nov3Moderate
Dec2Low
Location & terrain

Where is Loulé?

Loulé sits at 37.1°N, 8.0°W, 186 m above sea level, in Portugal. The nearest listed city is Quarteira, 10 km away.

Topography around Loulé

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

Within 3 km, the terrain around Loulé has significant variations in elevation — a maximum elevation change of 280 m around an average of 185 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 539 m; within 80 km, large variations in elevation — a maximum elevation change of 894 m.

The land around Loulé is covered by grassland (48%) and shrubs (20%) within 3 km, grassland (29%), trees (26%) and shrubs (25%) within 16 km, and water (35%) and grassland (33%) within 80 km.

3 km
280 m
16 km
539 m
80 km
894 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Quarteira 10 km · Faro 16 km · Quelfes 20 km · Olhão 20 km · Laranjeiro 20 km · Albufeira 21 km · Tavira 33 km · Portimão 46 km

Portugal travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E / F
230 V · 50 Hz
Prices
≈ 60% of US
price level, 2025
GDP per capita
$32,082
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
95%
of population, 2024
Homicide rate
0.7
per 100k, 2022
Road deaths
8.2
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 612
Religion
Catholic 68%not applicable 13%no religion 12%no response 2%

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 Loulé (37.1377°, -8.0197°, elevation 186 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).