Santa María Chimalhuacán weather in May

In May, Santa María Chimalhuacán sees average daytime highs of 27°C and overnight lows near 13°C, with 30 mm of rain across 7.2 wet days and about 12.9 hours of daylight. It is the 1st-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 41% of the time in May, and the air most often feels dry.

Daylight stretches from about 12 h 42 min at the start of May to 13 h 06 min by month's end. Set against the rest of the year, May is Santa María Chimalhuacán's 7th-clearest and 4th-windiest month. For the whole year in context, see Santa María Chimalhuacán's year-round climate.

Daytime high
27°
1st warmest
Overnight low
13°
11th coldest
Rainfall
30 mm
7.2 wet days
Daylight
12 h 54 min
6:05 AM – 7:00 PM
Cloud cover
49%
7th clearest
Wind
7 km/h
4th windiest
Solar energy
6.78 kWh/m²
Travel score
7.2
out of 10

Santa María Chimalhuacán is municipal seat of Chimalhuacán, State of México, Mexico.

Density
1,579/km²
people per km²
Founded
1259

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 27°C through the month.

A typical May day in Santa María Chimalhuacán reaches about 27°C in the afternoon and slips back to 13°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 30°C. Set against its neighbours, May runs on par with April and about 2°C warmer than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12712
22713
32713
42713
52713
62713
72713
82713
92613
102613
112613
122613
132613
142613
152613
162613
172713
182713
192713
202713
212713
222713
232713
242713
252713
262713
272713
282613
292613
302613
312613

Santa María Chimalhuacán weather by month

How May compares with the rest of the year at a glance. May is the 1st-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan21° / 102.2118.1
Feb23° / 81.811.38.6
Mar25° / 10°92.911.98.5
Apr26° / 12°184.112.47.8
May27° / 13°307.212.97.2
Jun25° / 14°11816.113.15.7
Jul24° / 13°14122.113.15.0
Aug23° / 13°15921.712.74.9
Sep23° / 13°15119.412.15.1
Oct22° / 11°7210.411.66.6
Nov22° / 173.611.18.0
Dec21° / 61.310.98.3

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 26% of May, with mostly cloudy or overcast conditions the remaining 32%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17030
26931
36931
46832
56931
66832
76931
86832
96832
106832
116832
126832
136931
146931
157030
167129
177129
187129
197129
207030
217030
227030
236931
246832
256733
266634
276436
286337
296238
306139
315941

Chance of precipitation in May

Any precipitation

Santa María Chimalhuacán gets around 30 mm of rain over 7.2 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 23% and peaks near 30% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
119
219
320
420
521
622
722
822
922
1023
1122
1222
1322
1422
1522
1622
1722
1822
1922
2022
2123
2223
2323
2424
2524
2625
2726
2827
2928
3029
3130

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 99% 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
141000
151000
161000
171000
18991
19991
20991
21991
22991
23982
24982
25982
26973
27973
28964
29964
30955
31946

Wind in May

Winds average 7 km/h in May.

Across May, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 42 min at the start of May to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over May. Sunrise moves from 6:12 AM to 6:01 AM, and sunset from 6:54 PM to 7:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:126:54
212.76:116:54
312.76:116:55
412.76:106:55
512.86:106:55
612.86:096:56
712.86:096:56
812.86:086:56
912.86:086:57
1012.86:076:57
1112.86:076:58
1212.96:066:58
1312.96:066:58
1412.96:056:59
1512.96:056:59
1612.96:057:00
1712.96:047:00
1812.96:047:00
1913.06:047:01
2013.06:037:01
2113.06:037:01
2213.06:037:02
2313.06:027:02
2413.06:027:03
2513.06:027:03
2613.06:027:03
2713.06:027:04
2813.06:017:04
2913.16:017:05
3013.16:017:05
3113.16:017:05

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.78 kWh/m².

For context, solar energy here swings from a low near 5.01 kWh/m² to a high of 7 kWh/m² in April across the year — May's 6.78 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.9Intense
26.9Intense
36.9Intense
46.9Intense
56.8Intense
66.8Intense
76.8Intense
86.8Intense
96.8Intense
106.8Intense
116.8Intense
126.8Intense
136.8Intense
146.8Intense
156.8Intense
166.8Intense
176.8Intense
186.8Intense
196.8Intense
206.8Intense
216.8Intense
226.8Intense
236.8Intense
246.8Intense
256.7Intense
266.7Intense
276.7Intense
286.7Intense
296.7Intense
306.6Intense
316.6Intense
Planning a trip in May

Hazard calendar for Santa María Chimalhuacán

In seasonPeak

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

Santa María Chimalhuacán's rainy season runs June–October, 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 Santa María Chimalhuacán?

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

7.2
Sightseeing
7th-best month of the year
7.1
Beach & pool
3rd-best month of the year

May is one of the better times to visit Santa María Chimalhuacán for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Santa María Chimalhuacán in May

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

In May, Santa María Chimalhuacán sees daytime highs around 27°C and nights near 13°C. Pack sun protection. Worth having: light clothes. About 7 days see rain.

sun protectionlight clothes

UV index in Santa María Chimalhuacán in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Santa María Chimalhuacán peaks around June 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highJun 17UV 14Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar14Extreme
Apr14Extreme
May11Extreme
Jun15Extreme
Jul12Extreme
Aug14Extreme
Sep11Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Santa María Chimalhuacán 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 Santa María Chimalhuacán is worst in December — around 179 µg/m³ PM2.5 (very unhealthy), and holds fairly steady the rest of the year.

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

0306090120150180210JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyVery unhealthyDec 11178 µg/m³Apr 14115 µg/m³
PM2.5 (µg/m³)Level
Jan149Unhealthy
Feb141Unhealthy
Mar126Unhealthy
Apr113Unhealthy
May134Unhealthy
Jun126Unhealthy
Jul135Unhealthy
Aug127Unhealthy
Sep136Unhealthy
Oct137Unhealthy
Nov174Very unhealthy
Dec179Very unhealthy
Location & terrain

Where is Santa María Chimalhuacán?

Santa María Chimalhuacán sits at 19.4°N, 99.0°W, 2,249 m above sea level, in Mexico. The nearest listed city is Chicoloapan, 5.0 km away.

Topography around Santa María Chimalhuacán

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

Within 3 km, the terrain around Santa María Chimalhuacán has significant variations in elevation — a maximum elevation change of 306 m around an average of 2,264 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 645 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,436 m.

The land around Santa María Chimalhuacán is covered by artificial surfaces (90%) within 3 km, artificial surfaces (51%) within 16 km, and trees (31%) and cropland (29%) within 80 km.

3 km
306 m
16 km
645 m
80 km
4,436 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Chicoloapan 5.0 km · Magdalena Atlicpac 6.0 km · Los Reyes Acaquilpan 7.0 km · Ciudad Nezahualcoyotl 7.0 km · San Miguel Coatlinchán 9.0 km · Emiliano Zapata 9.0 km · San Isidro 9.0 km · Texcoco de Mora 12 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 Santa María Chimalhuacán (19.4215°, -98.9504°, elevation 2,249 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).