Castelló de la Plana weather in May

In May, Castelló de la Plana sees average daytime highs of 22°C and overnight lows near 15°C, with 32 mm of rain across 4.9 wet days and about 14.2 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 20°C in the first days to 24°C by the end. The sky is clear or mostly clear about 44% of the time in May, and the air most often feels comfortable.

Daylight stretches from about 13 h 42 min at the start of May to 14 h 36 min by month's end. Set against the rest of the year, May is Castelló de la Plana's 10th-clearest and 7th-windiest month. For the whole year in context, see Castelló de la Plana's year-round climate.

Daytime high
22°
6th warmest
Overnight low
15°
7th coldest
Rainfall
32 mm
4.9 wet days
Daylight
14 h 12 min
5:50 AM – 8:03 PM
Cloud cover
47%
10th clearest
Wind
9 km/h
7th windiest
Solar energy
6.67 kWh/m²
Travel score
7.6
out of 10

Castelló de la Plana is innhabited place in Castellón de la Plana, Spain.

Air quality
Moderate
PM2.5 13.7 µg/m³ · 2019

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 20°C in the first days to 24°C by the end.

A typical May day in Castelló de la Plana reaches about 22°C in the afternoon and slips back to 15°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 25°C. Set against its neighbours, May runs about 3°C warmer than April and about 4°C cooler than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12013
22013
32013
42113
52113
62114
72114
82114
92114
102114
112114
122114
132214
142215
152215
162215
172215
182215
192215
202215
212315
222316
232316
242316
252316
262316
272316
282316
292416
302417
312417

Castelló de la Plana weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan15° / 364.69.55.1
Feb15° / 284.110.45.5
Mar17° / 344.911.76.4
Apr19° / 11°375.9136.9
May22° / 15°324.914.27.6
Jun26° / 19°193.114.88.3
Jul28° / 21°91.514.57.8
Aug29° / 22°203.713.66.9
Sep26° / 19°456.312.37.5
Oct23° / 15°506.310.97.5
Nov18° / 11°415.39.86.7
Dec15° / 3559.25.4

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 20% of May, with mostly cloudy or overcast conditions the remaining 36%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25743
35743
45743
55842
65842
75941
85941
96040
106139
116238
126337
136436
146436
156535
166634
176634
186733
196733
206832
216832
226832
236832
246832
256832
266832
276832
286931
296832
306832
316832

Chance of precipitation in May

Any precipitation

Castelló de la Plana gets around 32 mm of rain over 4.9 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 16% and peaks near 20% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
119
219
319
420
520
619
719
819
919
1018
1118
1218
1317
1417
1517
1616
1716
1815
1915
2014
2114
2214
2313
2413
2513
2612
2712
2813
2913
3013
3114

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the comfortable band about 40% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1643240
2633340
3603550
4573760
5563860
6543970
7514180
8494290
94743100
104543110
114344130
124145140
134045150
143845161
153745181
163645191
173444211
183344221
193243241
203142261
212942272
222841292
232740312
242539333
252439343
262238364
272137375
281936396
291835406
301734427
311633438

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 42 min at the start of May to 14 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over May. Sunrise moves from 6:07 AM to 5:40 AM, and sunset from 7:48 PM to 8:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.76:077:48
213.76:067:49
313.76:057:50
413.86:037:51
513.86:027:52
613.96:017:53
713.96:007:54
813.95:597:55
914.05:587:56
1014.05:567:57
1114.05:557:58
1214.15:547:59
1314.15:538:00
1414.15:528:01
1514.25:518:02
1614.25:508:03
1714.25:498:03
1814.35:498:04
1914.35:488:05
2014.35:478:06
2114.45:468:07
2214.45:458:08
2314.45:458:09
2414.45:448:10
2514.55:438:11
2614.55:428:12
2714.55:428:12
2814.55:418:13
2914.65:418:14
3014.65:408:15
3114.65:408:16

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.67 kWh/m².

For context, solar energy here swings from a low near 2.08 kWh/m² to a high of 7.16 kWh/m² in June across the year — May's 6.67 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.3Intense
36.3Intense
46.3Intense
56.3Intense
66.3Intense
76.4Intense
86.4Intense
96.4Intense
106.5Intense
116.5Intense
126.5Intense
136.6Intense
146.6Intense
156.7Intense
166.7Intense
176.8Intense
186.8Intense
196.8Intense
206.8Intense
216.9Intense
226.9Intense
236.9Intense
247.0Intense
257.0Intense
267.0Intense
277.0Intense
287.0Intense
297.0Intense
307.0Intense
317.0Intense
Planning a trip in May

Is May a good time to visit Castelló de la Plana?

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

7.6
Sightseeing
3rd-best month of the year
5.3
Beach & pool
6th-best month of the year

May is one of the better times to visit Castelló de la Plana for general sightseeing.

What to pack for Castelló de la Plana in May

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

In May, Castelló de la Plana sees daytime highs around 22°C and nights near 15°C. Pack sun protection. About 5 days see rain.

sun protection

Sea temperature near Castelló de la Plana in May

The nearest coast averages about 18°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 14 km away) is warmest in August at about 26°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 1 to Nov 2 — about 5.1 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb14Bracing
Mar14Bracing
Apr16Cool
May18Cool
Jun22Refreshing
Jul25Warm
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Castelló de la Plana in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Castelló de la Plana peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 15UV 9Dec 19UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5High
Apr7High
May6High
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec2Low

Air quality in Castelló de la Plana 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 Castelló de la Plana is worst in March — around 18 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (November, 9 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Castelló de la Plana's WHO annual average of 13.7 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 1917 µg/m³Nov 2010 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb14Moderate
Mar18Moderate
Apr16Moderate
May14Moderate
Jun14Moderate
Jul15Moderate
Aug15Moderate
Sep13Moderate
Oct12Moderate
Nov9Good
Dec10Good
Location & terrain

Where is Castelló de la Plana?

Castelló de la Plana sits at 40.0°N, 0.0°W, 30 m above sea level, in Spain. The nearest listed city is Almassora, 4.0 km away.

Topography around Castelló de la Plana

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

Within 3 km, the terrain around Castelló de la Plana has only modest variations in elevation — a maximum elevation change of 185 m around an average of 40 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 728 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,022 m.

The land around Castelló de la Plana is covered by artificial surfaces (43%) and grassland (31%) within 3 km, trees (34%) and water (28%) within 16 km, and water (38%) and trees (30%) within 80 km.

3 km
185 m
16 km
728 m
80 km
2,022 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Almassora 4.0 km · El Grao 5.0 km · Vila-real 7.0 km · Burriana 11 km · Benicàssim 12 km · Onda 18 km · Moncofa 21 km · Sagunto 38 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 Castelló de la Plana (39.9857°, -0.0493°, elevation 30 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).