Arcos de Valdevez weather in May

In May, Arcos de Valdevez sees average daytime highs of 19°C and overnight lows near 10°C, with 148 mm of rain across 13 wet days and about 14.3 hours of daylight. It is the 5th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 21°C by the end. The sky is clear or mostly clear about 30% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 48 min at the start of May to 14 h 48 min by month's end. Set against the rest of the year, May is Arcos de Valdevez's 5th-clearest and 7th-windiest month. For the whole year in context, see Arcos de Valdevez's year-round climate.

Daytime high
19°
5th warmest
Overnight low
10°
7th coldest
Rainfall
148 mm
13 wet days
Daylight
14 h 24 min
5:19 AM – 7:41 PM
Cloud cover
56%
5th clearest
Wind
9 km/h
7th windiest
Solar energy
6.29 kWh/m²
Travel score
5.8
out of 10

Arcos de Valdevez is town and municipal seat 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 18°C in the first days to 21°C by the end.

A typical May day in Arcos de Valdevez reaches about 19°C in the afternoon and slips back to 10°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 26°C. Set against its neighbours, May runs about 3°C warmer than April and about 3°C cooler than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
1189
2189
3189
4189
5189
6189
7189
8189
91910
101910
111910
121910
131910
141910
151910
161910
171910
182010
192011
202011
212011
222011
232011
242011
252111
262111
272111
282112
292112
302112
312112

Arcos de Valdevez 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
Jan12° / 23713.39.32.9
Feb13° / 15310.310.33.7
Mar16° / 18011.511.74.7
Apr17° / 16714.113.14.9
May19° / 10°1481314.35.8
Jun23° / 13°667.9157.3
Jul25° / 15°38514.78.2
Aug25° / 15°535.513.78.0
Sep23° / 13°1008.212.37.3
Oct19° / 11°25013.310.95.6
Nov15° / 24013.59.64.1
Dec13° / 24613.593.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 17% of May, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24357
34357
44456
54456
64357
74456
84456
94456
104555
114555
124555
134654
144654
154654
164753
174753
184951
194951
205050
215050
225149
235248
245248
255248
265248
275347
285347
295347
305347
315347

Chance of precipitation in May

Any precipitation

Arcos de Valdevez gets around 148 mm of rain over 13 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 42% and peaks near 46% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
146
246
346
446
546
646
746
846
946
1045
1145
1245
1344
1444
1544
1643
1742
1842
1941
2041
2140
2240
2339
2439
2538
2638
2737
2836
2936
3036
3135

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 83% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19460
29460
39370
49370
59280
69280
79190
89190
990100
1090100
1189110
1289110
1388120
1487130
1586140
1685150
1783161
1882171
1981181
2080191
2178202
2277212
2375223
2474233
2573243
2671254
2770264
2869274
2968284
3067294
3167294

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
318calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 48 min at the start of May to 14 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over May. Sunrise moves from 5:37 AM to 5:08 AM, and sunset from 7:24 PM to 7:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.85:377:24
213.85:367:26
313.95:357:27
413.95:337:28
513.95:327:29
614.05:317:30
714.05:297:31
814.15:287:32
914.15:277:33
1014.15:267:34
1114.25:257:35
1214.25:237:36
1314.35:227:37
1414.35:217:39
1514.35:207:40
1614.45:197:41
1714.45:187:42
1814.45:177:43
1914.55:167:44
2014.55:157:45
2114.55:157:46
2214.55:147:47
2314.65:137:48
2414.65:127:48
2514.65:117:49
2614.75:117:50
2714.75:107:51
2814.75:097:52
2914.75:097:53
3014.85:087:54
3114.85:087:55

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.29 kWh/m².

For context, solar energy here swings from a low near 1.56 kWh/m² to a high of 7.23 kWh/m² in July across the year — May's 6.29 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.9Bright
45.9Bright
55.9Bright
66.0Bright
76.0Bright
86.0Intense
96.0Intense
106.1Intense
116.1Intense
126.1Intense
136.2Intense
146.2Intense
156.2Intense
166.3Intense
176.3Intense
186.3Intense
196.4Intense
206.4Intense
216.5Intense
226.5Intense
236.5Intense
246.5Intense
256.6Intense
266.6Intense
276.6Intense
286.6Intense
296.7Intense
306.7Intense
316.7Intense
Planning a trip in May

Hazard calendar for Arcos de Valdevez

In seasonPeak

In May, Arcos de Valdevez sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Arcos de Valdevez's rainy season runs October–May, when most of the year's rain falls.

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

Is May a good time to visit Arcos de Valdevez?

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

5.8
Sightseeing
5th-best month of the year
2.7
Beach & pool
5th-best month of the year

May is a reasonable time to visit Arcos de Valdevez for sightseeing.

What to pack for Arcos de Valdevez in May

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

In May, Arcos de Valdevez sees daytime highs around 19°C and nights near 10°C. Pack sun protection. Worth having: rain gear. About 13 days see rain.

sun protectionrain gear

Sea temperature near Arcos de Valdevez in May

The nearest coast averages about 15°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 38 km away) is warmest in August at about 17°C and coldest in February near 13°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

12°14°16°18°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr14Bracing
May15Cool
Jun17Cool
Jul17Cool
Aug17Cool
Sep17Cool
Oct17Cool
Nov16Cool
Dec15Bracing

UV index in Arcos de Valdevez 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 Arcos de Valdevez peaks around July 12 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 12UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr7High
May7High
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Arcos de Valdevez in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Arcos de Valdevez is worst in September — around 19 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (November, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodSep 1819 µg/m³Nov 237 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar15Moderate
Apr12Good
May8Good
Jun8Good
Jul9Good
Aug14Moderate
Sep19Moderate
Oct17Moderate
Nov7Good
Dec7Good
Location & terrain

Where is Arcos de Valdevez?

Arcos de Valdevez sits at 41.8°N, 8.4°W, 42 m above sea level, in Portugal. The nearest listed city is Ponte de Lima, 16 km away.

Topography around Arcos de Valdevez

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

Within 3 km, the terrain around Arcos de Valdevez has significant variations in elevation — a maximum elevation change of 459 m around an average of 151 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,409 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,517 m.

The land around Arcos de Valdevez is covered by trees (58%) and grassland (33%) within 3 km, trees (55%) and grassland (43%) within 16 km, and trees (44%), grassland (29%) and water (20%) within 80 km.

3 km
459 m
16 km
1,409 m
80 km
1,517 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Ponte de Lima 16 km · Monção 26 km · Tui 29 km · Braga 33 km · Bairro Novo 34 km · Ponteareas 37 km · Viana do Castelo 38 km · Barcelos 39 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 Arcos de Valdevez (41.8467°, -8.4191°, elevation 42 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).