Alcalá de Henares weather in May

In May, Alcalá de Henares sees average daytime highs of 23°C and overnight lows near 10°C, with 50 mm of rain across 8.5 wet days and about 14.2 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 20°C in the first days to 25°C by the end. The sky is clear or mostly clear about 35% of the time in May, and the air most often feels dry.

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 Alcalá de Henares's 5th-clearest and 4th-windiest month. For the whole year in context, see Alcalá de Henares's year-round climate.

Daytime high
23°
5th warmest
Overnight low
10°
8th coldest
Rainfall
50 mm
8.5 wet days
Daylight
14 h 12 min
6:02 AM – 8:17 PM
Cloud cover
52%
5th clearest
Wind
10 km/h
4th windiest
Solar energy
6.66 kWh/m²
Travel score
7.1
out of 10

Alcalá de Henares is capital of Alcalá de Henares Municipality, Spain.

Air quality
Moderate
PM2.5 12.5 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 25°C by the end.

A typical May day in Alcalá de Henares reaches about 23°C in the afternoon and slips back to 10°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 29°C. Set against its neighbours, May runs about 5°C warmer than April and about 6°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1208
2208
3209
4209
5219
6219
7219
8219
9219
102110
112210
122210
132210
142210
152210
162310
172311
182311
192311
202311
212411
222411
232411
242412
252412
262512
272512
282512
292512
302513
312613

How May really feels in Alcalá de Henares

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.

Alcalá de Henares weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 427.70.89.42.3
Feb12° / 356.30.910.43.5
Mar16° / 447.70.311.75.3
Apr18° / 568.70136.1
May23° / 10°508.5014.27.1
Jun29° / 15°234014.86.8
Jul33° / 18°81.8014.64.8
Aug32° / 17°132.7013.65.0
Sep27° / 14°284.5012.37.5
Oct20° / 648.3010.96.6
Nov14° / 588.10.19.74.2
Dec10° / 477.70.59.22.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 22% of May, with mostly cloudy or overcast conditions the remaining 43%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24753
34753
44852
54852
64852
75050
85050
95149
105149
115347
125347
135545
145545
155743
165842
175842
186040
196139
206139
216238
226238
236337
246436
256436
266436
276535
286535
296535
306634
316634

Chance of precipitation in May

Any precipitation

Alcalá de Henares gets around 50 mm of rain over 8.5 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 27% and peaks near 31% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
129
229
330
430
530
630
731
831
931
1031
1131
1231
1331
1430
1530
1629
1728
1827
1927
2026
2125
2225
2324
2424
2523
2623
2722
2822
2922
3021
3121

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 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
14991
15991
16991
17991
18991
19982
20982
21982
22982
23973
24973
25973
26964
27964
28964
29964
30964
31955

Wind in May

Winds average 10 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
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
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 6:20 AM to 5:51 AM, and sunset from 8:02 PM to 8:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.76:208:02
213.76:188:03
313.86:178:04
413.86:168:05
513.96:158:06
613.96:138:07
713.96:128:08
814.06:118:09
914.06:108:10
1014.06:098:11
1114.16:088:12
1214.16:068:13
1314.16:058:14
1414.26:048:15
1514.26:038:16
1614.26:028:17
1714.36:018:18
1814.36:018:19
1914.36:008:20
2014.45:598:21
2114.45:588:22
2214.45:578:23
2314.55:568:24
2414.55:568:24
2514.55:558:25
2614.55:548:26
2714.65:548:27
2814.65:538:28
2914.65:528:29
3014.65:528:29
3114.65:518:30

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.66 kWh/m².

For context, solar energy here swings from a low near 1.81 kWh/m² to a high of 7.77 kWh/m² in July across the year — May's 6.66 kWh/m² falls in the middle.

02468151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.3Intense
66.3Intense
76.3Intense
86.4Intense
96.4Intense
106.4Intense
116.5Intense
126.5Intense
136.6Intense
146.6Intense
156.6Intense
166.7Intense
176.7Intense
186.8Intense
196.8Intense
206.8Intense
216.9Intense
226.9Intense
236.9Intense
247.0Intense
257.0Intense
267.0Intense
277.0Intense
287.0Intense
297.1Intense
307.1Intense
317.1Intense
Planning a trip in May

Is May a good time to visit Alcalá de Henares?

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

7.1
Sightseeing
2nd-best month of the year
5.2
Beach & pool
5th-best month of the year

May is one of the better times to visit Alcalá de Henares for general sightseeing.

What to pack for Alcalá de Henares in May

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

In May, Alcalá de Henares sees daytime highs around 23°C and nights near 10°C. Pack sun protection. Worth having: light clothes and rain gear. About 9 days see rain.

sun protectionlight clothesrain gear

UV index in Alcalá de Henares 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 Alcalá de Henares peaks around July 15 at about 10 (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 10Dec 19UV 2
UV index (midday)Level
Jan2Moderate
Feb2Moderate
Mar6High
Apr7High
May7High
Jun9Very high
Jul10Extreme
Aug9Very high
Sep7High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Alcalá de Henares 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 Alcalá de Henares is worst in March — around 16 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Alcalá de Henares's WHO annual average of 12.5 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodMar 1715 µg/m³Nov 1910 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb14Moderate
Mar16Moderate
Apr14Moderate
May11Good
Jun12Good
Jul12Good
Aug13Moderate
Sep12Moderate
Oct13Moderate
Nov10Good
Dec11Good
Location & terrain

Where is Alcalá de Henares?

Alcalá de Henares sits at 40.5°N, 3.4°W, 597 m above sea level, in Spain. The nearest listed city is Torrejón de Ardoz, 10 km away.

Topography around Alcalá de Henares

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

Within 3 km, the terrain around Alcalá de Henares has significant variations in elevation — a maximum elevation change of 279 m around an average of 609 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 375 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,961 m.

The land around Alcalá de Henares is covered by artificial surfaces (42%), trees (24%) and grassland (24%) within 3 km, cropland (53%) and grassland (24%) within 16 km, and cropland (38%), grassland (29%) and trees (25%) within 80 km.

3 km
279 m
16 km
375 m
80 km
1,961 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Torrejón de Ardoz 10 km · Azuqueca de Henares 12 km · Mejorada del Campo 14 km · San Fernando de Henares 16 km · Algete 17 km · Coslada 18 km · Rejas 18 km · Barajas de Madrid 18 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 Alcalá de Henares (40.4821°, -3.36°, elevation 597 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. 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).