Isla weather in May

In May, Isla sees average daytime highs of 35°C and overnight lows near 25°C, with 79 mm of rain across 11.4 wet days and about 12.8 hours of daylight. It is the 1st-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 38% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 36 min at the start of May to 13 hours by month's end. Set against the rest of the year, May is Isla's 4th-clearest and 8th-windiest month. For the whole year in context, see Isla's year-round climate.

Daytime high
35°
1st warmest
Overnight low
25°
12th coldest
Rainfall
79 mm
11.4 wet days
Daylight
12 h 48 min
5:53 AM – 6:44 PM
Cloud cover
51%
4th clearest
Wind
8 km/h
8th windiest
Solar energy
6.41 kWh/m²
Travel score
2.5
out of 10

Isla is municipal seat of Isla, State of Veracruz, Mexico.

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 35°C through the month.

A typical May day in Isla reaches about 35°C in the afternoon and slips back to 25°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 39°C. Set against its neighbours, May runs on par with April and about 2°C warmer than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13524
23524
33524
43525
53525
63525
73525
83525
93525
103525
113525
123525
133525
143525
153525
163525
173525
183525
193525
203525
213525
223525
233525
243525
253525
263525
273525
283525
293525
303525
313525

How May really feels in Isla

Once humidity and wind are folded in, May averages 31 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
31
31 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Isla weather by month

How May compares with the rest of the year at a glance. May is the 1st-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 18°519.1116.7
Feb28° / 19°30611.46.4
Mar32° / 21°234.911.94.9
Apr34° / 23°315.212.43.3
May35° / 25°7911.412.82.5
Jun33° / 24°24322.613.12.3
Jul32° / 24°29426.4132.5
Aug32° / 24°29726.512.62.5
Sep32° / 24°31524.912.12.7
Oct30° / 23°20819.211.63.9
Nov28° / 21°9312.811.25.6
Dec27° / 19°489.510.96.5

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 24% of May, with mostly cloudy or overcast conditions the remaining 39%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26535
36535
46535
56436
66436
76436
86337
96337
106337
116337
126337
136337
146436
156436
166436
176436
186337
196337
206337
216337
226238
236139
246040
255941
265743
275644
285446
295347
305149
315050

Chance of precipitation in May

Any precipitation

Isla gets around 79 mm of rain over 11.4 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 38% and peaks near 53% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
121
222
323
424
525
626
728
829
931
1032
1134
1235
1336
1437
1538
1639
1740
1841
1942
2042
2143
2244
2344
2445
2546
2647
2748
2849
2951
3052
3153

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 72% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1425683
2424693
3424693
4323704
5323704
6322705
7321706
8320716
9319717
10319708
11318709
122177110
132167210
142157211
152157112
161147213
171137214
181127215
191117315
201107316
21197416
22197317
23187318
24187318
25177319
26177319
27067420
28067321
29057322
30047323
31047224

Wind in May

Winds average 8 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
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 36 min at the start of May to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over May. Sunrise moves from 6:00 AM to 5:50 AM, and sunset from 6:39 PM to 6:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:006:39
212.75:596:39
312.75:596:39
412.75:586:40
512.75:586:40
612.75:576:40
712.75:576:41
812.75:566:41
912.85:566:41
1012.85:556:42
1112.85:556:42
1212.85:556:42
1312.85:546:43
1412.85:546:43
1512.85:536:43
1612.85:536:44
1712.95:536:44
1812.95:526:44
1912.95:526:45
2012.95:526:45
2112.95:526:46
2212.95:516:46
2312.95:516:46
2412.95:516:47
2512.95:516:47
2612.95:506:47
2713.05:506:48
2813.05:506:48
2913.05:506:49
3013.05:506:49
3113.05:506:49

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.41 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.38 kWh/m² to a high of 6.41 kWh/m² in May across the year — May's 6.41 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.5Intense
96.5Intense
106.5Intense
116.5Intense
126.5Intense
136.4Intense
146.4Intense
156.4Intense
166.4Intense
176.4Intense
186.4Intense
196.4Intense
206.4Intense
216.3Intense
226.3Intense
236.3Intense
246.3Intense
256.3Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.1Intense
316.1Intense
Planning a trip in May

Hazard calendar for Isla

In seasonPeak

None of Isla's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Isla's monsoon runs June–October, when most of the year's rain falls.

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

Is May a good time to visit Isla?

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

2.5
Sightseeing
9th-best month of the year
5.3
Beach & pool
7th-best month of the year

May is a weaker month for outdoor sightseeing in Isla.

What to pack for Isla in May

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

In May, Isla sees daytime highs around 35°C and nights near 25°C. Pack light clothes and sun protection. Worth having: rain gear. About 11 days see rain.

light clothessun protectionrain gear

UV index in Isla in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Isla peaks around August 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 7 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeExtremeVery highAug 17UV 12Dec 18UV 7
UV index (midday)Level
Jan8Very high
Feb10Extreme
Mar11Extreme
Apr13Extreme
May9Very high
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep11Extreme
Oct10Extreme
Nov8Very high
Dec7High

Air quality in Isla 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 Isla is worst in May — around 41 µg/m³ PM2.5 (poor), about 3.0× the cleanest month (January, 14 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMay 1739 µg/m³Jan 1814 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb15Moderate
Mar18Moderate
Apr27Moderate
May41Poor
Jun30Moderate
Jul34Moderate
Aug26Moderate
Sep23Moderate
Oct16Moderate
Nov15Moderate
Dec15Moderate
Location & terrain

Where is Isla?

Isla sits at 18.0°N, 95.5°W, 67 m above sea level, in Mexico. The nearest listed city is Loma Bonita, 38 km away.

Topography around Isla

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

Within 3 km, the terrain around Isla has only modest variations in elevation — a maximum elevation change of 56 m around an average of 52 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 155 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,657 m.

The land around Isla is covered by grassland (52%) and trees (25%) within 3 km, grassland (60%) and trees (27%) within 16 km, and grassland (46%) and trees (36%) within 80 km.

3 km
56 m
16 km
155 m
80 km
1,657 m
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
May weather nearby: Loma Bonita 38 km · Carlos A. Carrillo 45 km · Cosamaloapan 47 km · Santiago Tuxtla 54 km · San Andrés Tuxtla 57 km · Catemaco 62 km · Tuxtepec 63 km · Acayucan 66 km

Mexico travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B
120 / 127 V · 60 Hz
Prices
≈ 54% of US
price level, 2025
GDP per capita
$13,889
2025
Happiness
7.0 / 10
World Happiness, 2025
Safe drinking water
43%
of population, 2024
Homicide rate
24.9
per 100k, 2023
Road deaths
12.8
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very low
EF EPI 440
Religion
Catholic 78%no religion 11%other Evangelical Churches 8%Jehovah Witness 1%

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 Isla (18.0278°, -95.5295°, elevation 67 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).