El Rosario weather in May

In May, El Rosario sees average daytime highs of 32°C and overnight lows near 19°C, with 3 mm of rain across 0.5 wet days and about 13.1 hours of daylight. It is the 2nd-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 73% of the time in May, and the air most often feels humid.

Daylight stretches from about 12 h 48 min at the start of May to 13 h 18 min by month's end. Set against the rest of the year, May is El Rosario's 1st-clearest and 1st-windiest month. For the whole year in context, see El Rosario's year-round climate.

Daytime high
32°
2nd warmest
Overnight low
19°
7th coldest
Rainfall
3 mm
0.5 wet days
Daylight
13 h 06 min
5:27 AM – 6:33 PM
Cloud cover
25%
1st clearest
Wind
6 km/h
1st windiest
Solar energy
7.68 kWh/m²
Travel score
5.2
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical May day in El Rosario reaches about 32°C in the afternoon and slips back to 19°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°C. Set against its neighbours, May runs about 2°C warmer than April and on par with June.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13117
23118
33218
43218
53218
63218
73218
83218
93218
103218
113219
123219
133219
143219
153219
163219
173219
183219
193219
203220
213220
223220
233220
243220
253220
263220
273220
283221
293221
303221
313221

How May really feels in El Rosario

Once humidity and wind are folded in, May averages 23 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
23
heat index over the day's high
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.

El Rosario weather by month

How May compares with the rest of the year at a glance. May is the 2nd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 13°202.110.78.1
Feb27° / 13°191.411.28.1
Mar29° / 14°50.611.87.4
Apr30° / 16°10.212.56.3
May32° / 19°30.513.15.2
Jun32° / 23°709.313.44.1
Jul31° / 23°2362413.33.0
Aug30° / 23°28126.112.82.9
Sep30° / 23°24424.312.13.2
Oct30° / 21°9211.311.55.0
Nov29° / 17°302.610.96.9
Dec27° / 14°182.310.68.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 73% of the time in May, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of May, with mostly cloudy or overcast conditions the remaining 15%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17723
27723
37921
47921
58119
68119
78218
88218
98317
108416
118416
128515
138515
148515
158614
168614
178614
188614
198713
208713
218713
228812
238812
248911
258911
268812
278911
288911
298812
308812
318614

Chance of precipitation in May

Any precipitation

El Rosario gets around 3 mm of rain over 0.5 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 2% and peaks near 7% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
11
21
31
41
52
62
72
82
92
102
112
122
132
142
152
162
172
182
192
202
212
222
232
242
252
263
273
284
295
306
317

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the humid band about 39% of days. Sticky, muggy-or-worse air turns up on roughly 40% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
153847100
253747100
353648110
443549120
543349131
643250141
743150151
832951161
932850181
1032750201
1132550211
1232449241
1332348261
1422147281
1522046301
1621945331
1721744361
1821642391
1911441422
2011339452
2111137483
2211035513
231833544
240731575
250628606
260526618
270423649
2803216412
2902186614
3002166517
3101146619

Wind in May

Winds average 6 km/h in May, the windiest month of the year.

Across May, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 48 min at the start of May to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over May. Sunrise moves from 5:35 AM to 5:22 AM, and sunset from 6:26 PM to 6:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:356:26
212.95:356:26
312.95:346:27
412.95:336:27
512.95:336:28
612.95:326:28
713.05:316:29
813.05:316:29
913.05:306:29
1013.05:306:30
1113.05:296:30
1213.05:296:31
1313.15:286:31
1413.15:286:32
1513.15:276:32
1613.15:276:33
1713.15:266:33
1813.15:266:34
1913.15:256:34
2013.25:256:35
2113.25:256:35
2213.25:246:36
2313.25:246:36
2413.25:246:37
2513.25:236:37
2613.25:236:37
2713.35:236:38
2813.35:236:38
2913.35:226:39
3013.35:226:39
3113.35:226:40

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.68 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.33 kWh/m² to a high of 7.68 kWh/m² in May across the year — May's 7.68 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.7Intense
27.7Intense
37.7Intense
47.7Intense
57.7Intense
67.7Intense
77.7Intense
87.7Intense
97.7Intense
107.7Intense
117.7Intense
127.7Intense
137.7Intense
147.7Intense
157.7Intense
167.7Intense
177.7Intense
187.7Intense
197.7Intense
207.7Intense
217.6Intense
227.6Intense
237.6Intense
247.5Intense
257.5Intense
267.5Intense
277.4Intense
287.4Intense
297.3Intense
307.3Intense
317.2Intense
Planning a trip in May

Hazard calendar for El Rosario

In seasonPeak

In May, El Rosario sits inside its pacific hurricane season. The full year is below, with each hazard's peak months called out.

El Rosario sits in the eastern Pacific hurricane zone; the season peaks August–September.

El Rosario's monsoon runs July–September, when most of the year's rain falls.

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

Is May a good time to visit El Rosario?

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

5.2
Sightseeing
7th-best month of the year
8.3
Beach & pool
5th-best month of the year

May is a reasonable time to visit El Rosario for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for El Rosario in May

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

In May, El Rosario sees daytime highs around 32°C and nights near 19°C. Pack light clothes and sun protection.

light clothessun protection

Sea temperature near El Rosario in May

The nearest coast averages about 26°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 31 km away) is warmest in August at about 30°C and coldest in March near 23°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan24Refreshing
Feb23Refreshing
Mar23Refreshing
Apr23Refreshing
May26Warm
Jun28Warm
Jul29Tropical
Aug30Tropical
Sep30Tropical
Oct30Tropical
Nov28Warm
Dec25Warm

UV index in El Rosario in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in El Rosario peaks around May 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighMay 17UV 12Dec 20UV 6
UV index (midday)Level
Jan6High
Feb9Very high
Mar10Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep11Extreme
Oct8Very high
Nov6High
Dec6High

Air quality in El Rosario 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 El Rosario is worst in May — around 22 µg/m³ PM2.5 (moderate), about 3.8× the cleanest month (January, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1821 µg/m³Jan 166 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb6Good
Mar7Good
Apr11Good
May22Moderate
Jun14Moderate
Jul8Good
Aug8Good
Sep9Good
Oct8Good
Nov7Good
Dec6Good
Location & terrain

Where is El Rosario?

El Rosario sits at 23.0°N, 105.9°W, 33 m above sea level, in Mexico. The nearest listed city is Escuinapa de Hidalgo, 19 km away.

Topography around El Rosario

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

Within 3 km, the terrain around El Rosario has only modest variations in elevation — a maximum elevation change of 222 m around an average of 42 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 915 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,912 m.

The land around El Rosario is covered by trees (43%) and cropland (25%) within 3 km, trees (68%) within 16 km, and trees (59%) and water (25%) within 80 km.

3 km
222 m
16 km
915 m
80 km
2,912 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwatermangroves
May weather nearby: Escuinapa de Hidalgo 19 km · Mazatlan 63 km · Pueblo Nuevo 66 km · Acaponeta 75 km · El Salto 101 km · Tuxpan 130 km · Santiago Ixcuintla 147 km · La Cruz 148 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 El Rosario (22.9903°, -105.8542°, elevation 33 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).