Santo Domingo Tehuantepec weather in May

In May, Santo Domingo Tehuantepec sees average daytime highs of 34°C and overnight lows near 25°C, with 67 mm of rain across 9.9 wet days and about 12.8 hours of daylight. It is the 1st-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 33% 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 12 h 54 min by month's end. Set against the rest of the year, May is Santo Domingo Tehuantepec's 7th-clearest and 10th-windiest month. For the whole year in context, see Santo Domingo Tehuantepec's year-round climate.

Daytime high
34°
1st warmest
Overnight low
25°
11th coldest
Rainfall
67 mm
9.9 wet days
Daylight
12 h 48 min
5:54 AM – 6:40 PM
Cloud cover
55%
7th clearest
Wind
11 km/h
10th windiest
Solar energy
6.59 kWh/m²
Travel score
3.0
out of 10

Santo Domingo Tehuantepec is municipal seat of Tehuantepec, State of Oaxaca, Mexico.

Density
70/km²
people per km²
Founded
1450

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 34°C through the month.

A typical May day in Santo Domingo Tehuantepec reaches about 34°C in the afternoon and slips back to 25°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 37°C. Set against its neighbours, May runs on par with April and about 1°C warmer than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13425
23425
33425
43425
53425
63425
73425
83425
93425
103425
113425
123425
133425
143425
153425
163425
173425
183425
193425
203425
213425
223425
233425
243425
253425
263325
273325
283325
293325
303325
313325

How May really feels in Santo Domingo Tehuantepec

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
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.

Santo Domingo Tehuantepec 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
Jan30° / 21°30.811.16.5
Feb31° / 21°30.811.55.7
Mar33° / 22°4111.94.8
Apr34° / 24°61.712.43.8
May34° / 25°679.912.83.0
Jun33° / 25°23317.8132.9
Jul34° / 25°12211.612.93.0
Aug34° / 25°16314.612.52.8
Sep32° / 25°20617.412.13.1
Oct32° / 24°848.611.64.1
Nov32° / 23°151.711.25.3
Dec31° / 21°40.8116.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% 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 44%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17426
27426
37327
47129
57030
66832
76634
86535
96436
106238
116139
126040
135941
145743
155644
165644
175545
185446
195347
205149
215050
224951
234951
244753
254753
264456
274357
284258
294060
303961
313862

Chance of precipitation in May

Any precipitation

Santo Domingo Tehuantepec gets around 67 mm of rain over 9.9 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 32% and peaks near 54% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
110
210
312
413
514
615
717
819
920
1022
1124
1225
1327
1429
1530
1632
1733
1835
1936
2038
2140
2241
2343
2444
2546
2647
2749
2850
2951
3053
3154

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 49% of days. Sticky, muggy-or-worse air turns up on roughly 93% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1129235312
2019225513
3018225514
4018225514
5018225415
6018225316
7018225217
8018235018
9018235019
10018234920
11018234721
12018234622
13018234523
14018234424
15017234325
16017234326
17017224327
18017224228
19016214329
20016214330
21016204430
22015194531
23005184631
24004174732
25004164832
26003155032
27003145033
28002135233
29002125333
30001115434
31001105435

Wind in May

Winds average 11 km/h in May.

Across May, daily wind ranges from about 9 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
279calm
289calm
299calm
309calm
319calm

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 6:01 AM to 5:52 AM, and sunset from 6:36 PM to 6:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:016:36
212.66:006:36
312.66:006:36
412.65:596:36
512.65:596:37
612.65:586:37
712.75:586:37
812.75:576:37
912.75:576:38
1012.75:576:38
1112.75:566:38
1212.75:566:39
1312.75:556:39
1412.75:556:39
1512.75:556:40
1612.85:546:40
1712.85:546:40
1812.85:546:41
1912.85:546:41
2012.85:536:41
2112.85:536:42
2212.85:536:42
2312.85:536:42
2412.85:526:43
2512.85:526:43
2612.95:526:43
2712.95:526:44
2812.95:526:44
2912.95:526:44
3012.95:526:45
3112.95:526:45

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.59 kWh/m².

For context, solar energy here swings from a low near 5.2 kWh/m² to a high of 7.02 kWh/m² in April across the year — May's 6.59 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
17.0Intense
26.9Intense
36.9Intense
46.9Intense
56.9Intense
66.9Intense
76.9Intense
86.8Intense
96.8Intense
106.8Intense
116.8Intense
126.8Intense
136.7Intense
146.7Intense
156.7Intense
166.6Intense
176.6Intense
186.6Intense
196.5Intense
206.5Intense
216.5Intense
226.4Intense
236.4Intense
246.3Intense
256.3Intense
266.2Intense
276.2Intense
286.1Intense
296.1Intense
306.0Intense
316.0Bright
Planning a trip in May

Hazard calendar for Santo Domingo Tehuantepec

In seasonPeak

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

Santo Domingo Tehuantepec sits in the Atlantic hurricane belt; the season peaks August–October.

Santo Domingo Tehuantepec's monsoon runs June–September, when most of the year's rain falls.

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

Is May a good time to visit Santo Domingo Tehuantepec?

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

3.0
Sightseeing
9th-best month of the year
6.0
Beach & pool
8th-best month of the year

May is a weaker month for outdoor sightseeing in Santo Domingo Tehuantepec. The water and warmth also suit a beach or pool day.

What to pack for Santo Domingo Tehuantepec in May

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

In May, Santo Domingo Tehuantepec sees daytime highs around 34°C and nights near 25°C. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.

light clothessun protectionrain gear

Sea temperature near Santo Domingo Tehuantepec in May

The nearest coast averages about 29°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 25 km away) is warmest in August at about 30°C and coldest in January near 26°C.

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

24°26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar27Warm
Apr28Tropical
May29Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov27Warm
Dec27Warm

UV index in Santo Domingo Tehuantepec 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 Santo Domingo Tehuantepec peaks around April 13 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 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 13UV 13Dec 18UV 8
UV index (midday)Level
Jan8Very high
Feb12Extreme
Mar12Extreme
Apr13Extreme
May12Extreme
Jun13Extreme
Jul12Extreme
Aug13Extreme
Sep11Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Santo Domingo Tehuantepec 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 Santo Domingo Tehuantepec is worst in May — around 32 µg/m³ PM2.5 (moderate), about 3.9× the cleanest month (November, 8 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1531 µg/m³Nov 238 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar14Moderate
Apr25Moderate
May32Moderate
Jun21Moderate
Jul27Moderate
Aug20Moderate
Sep18Moderate
Oct11Good
Nov8Good
Dec8Good
Location & terrain

Where is Santo Domingo Tehuantepec?

Santo Domingo Tehuantepec sits at 16.3°N, 95.2°W, 44 m above sea level, in Mexico. The nearest listed city is Salina Cruz, 17 km away.

Topography around Santo Domingo Tehuantepec

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

Within 3 km, the terrain around Santo Domingo Tehuantepec has only modest variations in elevation — a maximum elevation change of 156 m around an average of 45 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,049 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,818 m.

The land around Santo Domingo Tehuantepec is covered by artificial surfaces (33%) and grassland (23%) within 3 km, trees (40%) and grassland (20%) within 16 km, and trees (40%) and water (28%) within 80 km.

3 km
156 m
16 km
1,049 m
80 km
2,818 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwatermangroves
May weather nearby: Salina Cruz 17 km · Heroica Ciudad de Juchitán de Zaragoza 26 km · Ixtepec 30 km · Matías Romero Avendaño 65 km · Crucecita 114 km · Arriaga 144 km · Miahuatlán de Porfirio Díaz 145 km · Tonalá 161 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 Santo Domingo Tehuantepec (16.3246°, -95.241°, elevation 44 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).