Yajalón weather in May

In May, Yajalón sees average daytime highs of 30°C and overnight lows near 19°C, with 156 mm of rain across 16.9 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 30°C through the month. The sky is clear or mostly clear about 27% of the time in May, and the air most often feels muggy.

Daylight stretches from about 12 h 36 min at the start of May to 12 h 54 min by month's end. Set against the rest of the year, May is Yajalón's 6th-clearest and 7th-windiest month. For the whole year in context, see Yajalón's year-round climate.

Daytime high
30°
1st warmest
Overnight low
19°
11th coldest
Rainfall
156 mm
16.9 wet days
Daylight
12 h 48 min
5:42 AM – 6:30 PM
Cloud cover
60%
6th clearest
Wind
5 km/h
7th windiest
Solar energy
6.25 kWh/m²
Travel score
4.1
out of 10

Yajalón is municipal seat of Yajalón, State of Chiapas, Mexico.

Founded
1562

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 30°C through the month.

A typical May day in Yajalón reaches about 30°C in the afternoon and slips back to 19°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 33°C. Set against its neighbours, May runs on par with April and about 1°C warmer than June.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13019
23019
33019
43019
53019
63019
73019
83019
93019
103019
113019
123019
133019
143019
153019
163019
173019
183019
193019
203019
213020
223020
233020
243020
253020
263020
273020
283020
293020
303020
313020

Yajalón 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
Jan24° / 14°15013.811.16.5
Feb26° / 15°9610.111.46.8
Mar28° / 16°839.311.96.6
Apr30° / 18°9510.512.45.2
May30° / 19°15616.912.84.1
Jun29° / 20°29224.2133.5
Jul29° / 19°18220.912.94.0
Aug29° / 19°24224.512.63.6
Sep28° / 19°30627.612.13.4
Oct27° / 19°26323.711.64.4
Nov25° / 17°19416.611.25.7
Dec24° / 15°13713.8116.4

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% 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 52%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26139
36139
45941
55941
65743
75644
85545
95446
105248
115248
125149
135050
144951
154951
164852
174753
184753
194654
204654
214555
224456
234357
244258
254159
263961
273763
283763
293565
303466
313367

Chance of precipitation in May

Any precipitation

Yajalón gets around 156 mm of rain over 16.9 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 56% and peaks near 74% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
138
238
339
440
541
642
743
845
946
1048
1149
1251
1352
1454
1555
1657
1759
1860
1961
2062
2163
2264
2364
2465
2566
2667
2769
2870
2972
3073
3174

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the muggy band about 68% of days. Sticky, muggy-or-worse air turns up on roughly 84% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
14226410
23236410
33236410
42236510
52236510
62226610
72226610
82216710
91216810
101206811
111206811
121196812
131186912
141176913
151166914
161156915
171146916
181137016
191127017
200117118
210107119
220107119
23097120
24097021
25087022
26086923
27076924
28076825
29066826
30066727
31056728

Wind in May

Winds average 5 km/h in May.

Across May, daily wind ranges from about 4 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 36 min at the start of May to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over May. Sunrise moves from 5:48 AM to 5:38 AM, and sunset from 6:25 PM to 6:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:486:25
212.65:486:25
312.65:476:25
412.75:476:26
512.75:466:26
612.75:466:26
712.75:456:27
812.75:456:27
912.75:446:27
1012.75:446:28
1112.75:436:28
1212.85:436:28
1312.85:436:29
1412.85:426:29
1512.85:426:29
1612.85:426:30
1712.85:416:30
1812.85:416:30
1912.85:416:31
2012.85:406:31
2112.95:406:31
2212.95:406:32
2312.95:406:32
2412.95:396:32
2512.95:396:33
2612.95:396:33
2712.95:396:34
2812.95:396:34
2912.95:396:34
3012.95:396:35
3112.95:386:35

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.25 kWh/m².

For context, solar energy here swings from a low near 4.06 kWh/m² to a high of 6.51 kWh/m² in April across the year — May's 6.25 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
86.4Intense
96.4Intense
106.4Intense
116.4Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.2Intense
176.2Intense
186.2Intense
196.2Intense
206.1Intense
216.1Intense
226.1Intense
236.0Intense
246.0Bright
256.0Bright
265.9Bright
275.9Bright
285.8Bright
295.8Bright
305.7Bright
315.7Bright
Planning a trip in May

Is May a good time to visit Yajalón?

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

4.1
Sightseeing
8th-best month of the year
5.7
Beach & pool
4th-best month of the year

May is a reasonable time to visit Yajalón for sightseeing.

What to pack for Yajalón in May

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

In May, Yajalón sees daytime highs around 30°C and nights near 19°C. Pack light clothes, rain gear and sun protection. About 17 days see rain.

light clothesrain gearsun protection

UV index in Yajalón in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Yajalón peaks around April 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 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 highApr 12UV 14Dec 19UV 8
UV index (midday)Level
Jan8Very high
Feb12Extreme
Mar13Extreme
Apr14Extreme
May10Very high
Jun13Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Yajalón 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 Yajalón is worst in April — around 80 µg/m³ PM2.5 (unhealthy), about 6.5× the cleanest month (December, 12 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecModerateUnhealthyModerateApr 2379 µg/m³Dec 2212 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb14Moderate
Mar20Moderate
Apr80Unhealthy
May77Unhealthy
Jun27Moderate
Jul26Moderate
Aug22Moderate
Sep21Moderate
Oct17Moderate
Nov15Moderate
Dec12Moderate
Location & terrain

Where is Yajalón?

Yajalón sits at 17.2°N, 92.3°W, 797 m above sea level, in Mexico. The nearest listed city is Ocosingo, 39 km away.

Topography around Yajalón

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

Within 3 km, the terrain around Yajalón has large variations in elevation — a maximum elevation change of 961 m around an average of 1,037 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,160 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,873 m.

The land around Yajalón is covered by trees (72%) and grassland (21%) within 3 km, trees (82%) within 16 km, and trees (68%) and grassland (30%) within 80 km.

3 km
961 m
16 km
2,160 m
80 km
2,873 m
treesgrasslandartificial surfaceswater
May weather nearby: Ocosingo 39 km · Palenque 53 km · San Cristóbal de las Casas 59 km · Macuspana 71 km · Teopisca 72 km · Teapa 78 km · Emiliano Zapata 87 km · Chiapas 89 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 Yajalón (17.1729°, -92.3339°, elevation 797 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).