Altepexi weather in May

In May, Altepexi sees average daytime highs of 28°C and overnight lows near 15°C, with 65 mm of rain across 13.9 wet days and about 12.9 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 30% of the time in May, and the air most often feels comfortable.

Daylight stretches from about 12 h 42 min at the start of May to 13 hours by month's end. Set against the rest of the year, May is Altepexi's 7th-clearest and 10th-windiest month. For the whole year in context, see Altepexi's year-round climate.

Daytime high
28°
2nd warmest
Overnight low
15°
11th coldest
Rainfall
65 mm
13.9 wet days
Daylight
12 h 54 min
6:00 AM – 6:51 PM
Cloud cover
55%
7th clearest
Wind
6 km/h
10th windiest
Solar energy
6.66 kWh/m²
Travel score
5.8
out of 10

Altepexi is municipal seat of Altepexi, State of Puebla, 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 28°C through the month.

A typical May day in Altepexi reaches about 28°C in the afternoon and slips back to 15°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 31°C. Set against its neighbours, May runs on par with April and about 2°C warmer than June.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12815
22815
32815
42815
52815
62815
72815
82815
92815
102815
112815
122815
132815
142815
152815
162815
172815
182815
192815
202815
212715
222715
232715
242715
252716
262716
272716
282716
292716
302716
312716

Altepexi weather by month

How May compares with the rest of the year at a glance. May is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 133.7117.9
Feb24° / 10°123.411.48.2
Mar27° / 12°195.111.97.7
Apr28° / 14°368.312.46.4
May28° / 15°6513.912.95.8
Jun26° / 16°12717.413.15.4
Jul26° / 15°8612.7136.2
Aug26° / 15°8613.812.66.0
Sep25° / 15°12517.512.15.4
Oct24° / 14°7811.711.66.5
Nov23° / 12°27711.17.4
Dec22° / 10°123.510.97.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 28% of May, with mostly cloudy or overcast conditions the remaining 42%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16634
26535
36535
46535
56436
66337
76337
86139
96139
106139
116040
126139
136139
146040
156040
165941
175941
185941
195941
205743
215644
225644
235545
245446
255248
265149
275050
284951
294753
304654
314555

Chance of precipitation in May

Any precipitation

Altepexi gets around 65 mm of rain over 13.9 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 45% and peaks near 55% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
135
235
336
437
539
640
741
842
943
1044
1144
1245
1345
1446
1546
1647
1747
1847
1947
2047
2147
2247
2348
2448
2548
2649
2750
2851
2952
3053
3155

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 65% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
138566
237576
335596
434606
532617
631627
729638
828648
927649
10266410
11256411
12246511
13236512
14226513
15216514
16206515
17196516
18186616
19176617
20176617
21166717
22156718
23146818
24136918
25126919
26117019
27107020
28106921
2996922
3086923
3186824

Wind in May

Winds average 6 km/h in May.

Across May, daily wind ranges from about 5 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
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 42 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 18 minutes over May. Sunrise moves from 6:07 AM to 5:56 AM, and sunset from 6:46 PM to 6:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:076:46
212.76:066:46
312.76:066:47
412.76:056:47
512.76:046:47
612.76:046:48
712.76:036:48
812.86:036:48
912.86:026:49
1012.86:026:49
1112.86:026:49
1212.86:016:50
1312.86:016:50
1412.86:006:51
1512.86:006:51
1612.96:006:51
1712.95:596:52
1812.95:596:52
1912.95:596:52
2012.95:586:53
2112.95:586:53
2212.95:586:54
2312.95:586:54
2413.05:576:54
2513.05:576:55
2613.05:576:55
2713.05:576:55
2813.05:576:56
2913.05:566:56
3013.05:566:57
3113.05:566:57

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 4.53 kWh/m² to a high of 6.96 kWh/m² in April across the year — May's 6.66 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.9Intense
26.9Intense
36.9Intense
46.9Intense
56.9Intense
66.8Intense
76.8Intense
86.8Intense
96.8Intense
106.8Intense
116.7Intense
126.7Intense
136.7Intense
146.7Intense
156.7Intense
166.6Intense
176.6Intense
186.6Intense
196.6Intense
206.6Intense
216.6Intense
226.5Intense
236.5Intense
246.5Intense
256.5Intense
266.4Intense
276.4Intense
286.4Intense
296.3Intense
306.3Intense
316.3Intense
Planning a trip in May

Hazard calendar for Altepexi

In seasonPeak

In May, Altepexi sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Altepexi's rainy season runs May–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 Altepexi?

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

5.8
Sightseeing
10th-best month of the year
6.2
Beach & pool
4th-best month of the year

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

What to pack for Altepexi in May

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

In May, Altepexi sees daytime highs around 28°C and nights near 15°C. Pack light clothes, rain gear and sun protection. About 14 days see rain.

light clothesrain gearsun protection

UV index in Altepexi 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 Altepexi peaks around April 12 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 highExtremeExtremeVery highApr 12UV 14Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar13Extreme
Apr15Extreme
May9Very high
Jun13Extreme
Jul12Extreme
Aug14Extreme
Sep13Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Altepexi 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 Altepexi is worst in May — around 27 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (January, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateMay 1626 µg/m³Jan 1811 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb12Good
Mar14Moderate
Apr21Moderate
May27Moderate
Jun19Moderate
Jul19Moderate
Aug15Moderate
Sep16Moderate
Oct13Moderate
Nov12Moderate
Dec12Moderate
Location & terrain

Where is Altepexi?

Altepexi sits at 18.4°N, 97.3°W, 1,238 m above sea level, in Mexico. The nearest listed city is Ajalpan, 4.0 km away.

Topography around Altepexi

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

Within 3 km, the terrain around Altepexi has only modest variations in elevation — a maximum elevation change of 125 m around an average of 1,255 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,622 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,498 m.

The land around Altepexi is covered by cropland (53%) within 3 km, shrubs (66%) within 16 km, and shrubs (44%) and trees (34%) within 80 km.

3 km
125 m
16 km
1,622 m
80 km
5,498 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Ajalpan 4.0 km · Zinacatepec 7.0 km · Tehuacán 15 km · Ciudad Mendoza 50 km · Nogales 53 km · Río Blanco 53 km · Orizaba 58 km · Ixtaczoquitlán 59 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 Altepexi (18.3703°, -97.2997°, elevation 1,238 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).