Loulé weather in May

In May, Loulé sees average daytime highs of 24°C and overnight lows near 13°C, with 38 mm of rain across 6.5 wet days and about 14 hours of daylight. It is the 5th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 22°C in the first days to 26°C by the end. The sky is clear or mostly clear about 46% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 30 min at the start of May to 14 h 18 min by month's end. Set against the rest of the year, May is Loulé's 5th-clearest and 4th-windiest month. For the whole year in context, see Loulé's year-round climate.

Daytime high
24°
5th warmest
Overnight low
13°
7th coldest
Rainfall
38 mm
6.5 wet days
Daylight
14 hours
5:29 AM – 7:28 PM
Cloud cover
45%
5th clearest
Wind
14 km/h
4th windiest
Solar energy
6.97 kWh/m²
Travel score
7.7
out of 10

Loulé is human settlement in Portugal.

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 22°C in the first days to 26°C by the end.

A typical May day in Loulé reaches about 24°C in the afternoon and slips back to 13°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 29°C. Set against its neighbours, May runs about 4°C warmer than April and about 5°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12211
22211
32211
42211
52212
62212
72212
82212
92312
102312
112312
122312
132312
142312
152413
162413
172413
182413
192413
202413
212413
222513
232514
242514
252514
262514
272514
282514
292614
302614
312614

How May really feels in Loulé

Once humidity and wind are folded in, May 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

May 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 May compares with the rest of the year at a glance. May is the 5th-warmest and 8th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 37%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25644
35743
45743
55842
65842
75842
85941
95941
106040
116040
126139
136139
146337
156337
166436
176436
186436
196436
206634
216634
226634
236634
246634
256733
266733
276733
286832
296832
306832
316931

Chance of precipitation in May

Any precipitation

Loulé gets around 38 mm of rain over 6.5 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 20% and peaks near 24% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
124
224
324
424
524
624
724
824
924
1023
1123
1223
1322
1422
1522
1622
1721
1821
1920
2020
2119
2219
2318
2417
2517
2616
2715
2815
2914
3013
3113

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 82% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19190
29190
39190
490100
590100
690100
789110
889110
988120
1087121
1186131
1285141
1385141
1484151
1583161
1683161
1781172
1880182
1980182
2079192
2178193
2277203
2377203
2475214
2575214
2675214
2774224
2874224
2974224
3074224
3174224

Wind in May

Winds average 14 km/h in May.

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

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 30 min at the start of May to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over May. Sunrise moves from 5:44 AM to 5:19 AM, and sunset from 7:14 PM to 7:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:447:14
213.55:437:15
313.65:427:16
413.65:417:17
513.65:407:18
613.75:387:19
713.75:377:20
813.75:367:21
913.85:357:22
1013.85:347:23
1113.85:337:23
1213.95:327:24
1313.95:317:25
1413.95:317:26
1514.05:307:27
1614.05:297:28
1714.05:287:29
1814.05:277:30
1914.15:267:30
2014.15:267:31
2114.15:257:32
2214.15:247:33
2314.25:247:34
2414.25:237:34
2514.25:227:35
2614.25:227:36
2714.35:217:37
2814.35:217:37
2914.35:207:38
3014.35:207:39
3114.35:197:40

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.97 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 — May's 6.97 kWh/m² falls in the middle.

02468151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.6Intense
36.6Intense
46.6Intense
56.7Intense
66.7Intense
76.7Intense
86.8Intense
96.8Intense
106.8Intense
116.8Intense
126.9Intense
136.9Intense
146.9Intense
157.0Intense
167.0Intense
177.0Intense
187.1Intense
197.1Intense
207.1Intense
217.1Intense
227.2Intense
237.2Intense
247.2Intense
257.2Intense
267.3Intense
277.3Intense
287.3Intense
297.3Intense
307.4Intense
317.4Intense
Planning a trip in May

Is May a good time to visit Loulé?

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

7.7
Sightseeing
1st-best month of the year
6.2
Beach & pool
5th-best month of the year

May 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 May

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

In May, Loulé sees daytime highs around 24°C and nights near 13°C. Pack sun protection. Worth having: light clothes. About 7 days see rain.

sun protectionlight clothes

Sea temperature near Loulé in May

The nearest coast averages about 17°C in May — 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 May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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
May 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).