San Francisco Zapotitlán weather in May

In May, San Francisco Zapotitlán sees average daytime highs of 30°C and overnight lows near 22°C, with 438 mm of rain across 28.5 wet days and about 12.7 hours of daylight. It is the 4th-warmest and 4th-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 8% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 30 min at the start of May to 12 h 48 min by month's end. Set against the rest of the year, May is San Francisco Zapotitlán's 7th-clearest and 8th-windiest month. For the whole year in context, see San Francisco Zapotitlán's year-round climate.

Daytime high
30°
4th warmest
Overnight low
22°
12th coldest
Rainfall
438 mm
28.5 wet days
Daylight
12 h 42 min
5:42 AM – 6:23 PM
Cloud cover
76%
7th clearest
Wind
4 km/h
8th windiest
Solar energy
5.54 kWh/m²
Travel score
2.9
out of 10

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 San Francisco Zapotitlán reaches about 30°C in the afternoon and slips back to 22°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°C. Set against its neighbours, May runs about 1°C cooler than April and about 1°C warmer than June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13122
23122
33122
43122
53022
63022
73022
83022
93022
103022
113022
123022
133022
143022
153022
163022
173022
183022
193022
203022
213022
223022
232922
242922
252922
262922
272922
282922
292922
302922
312922

How May really feels in San Francisco Zapotitlán

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.

San Francisco Zapotitlán weather by month

How May compares with the rest of the year at a glance. May is the 4th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 20°22611.26.0
Feb31° / 20°175.211.55.4
Mar31° / 21°5310.911.94.5
Apr31° / 22°13317.912.33.6
May30° / 22°43828.512.72.9
Jun29° / 22°4332912.82.9
Jul29° / 22°36630.112.82.9
Aug29° / 22°45230.612.52.9
Sep29° / 22°54229.512.12.9
Oct28° / 22°54129.811.73.1
Nov29° / 21°2072211.34.2
Dec29° / 20°411011.25.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 77%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24258
34060
43961
53961
63763
73664
83565
93268
103169
112971
122773
132575
142377
152278
162179
171981
181783
191783
201585
211585
221486
231486
241486
251189
261189
271189
281090
291090
30991
31991

Chance of precipitation in May

Any precipitation

San Francisco Zapotitlán gets around 438 mm of rain over 28.5 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 91% and peaks near 96% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
182
283
384
485
586
687
788
888
989
1089
1189
1289
1390
1490
1590
1691
1792
1892
1993
2093
2194
2294
2395
2495
2595
2695
2796
2896
2996
3096
3196

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 86% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1227710
2225721
3223741
4221761
5119791
6117811
7116821
8114841
9113851
10112861
11111871
12110872
1319882
1419882
1518892
1617902
1717902
1817902
1917902
2017902
2117902
2217902
2318892
2418892
2519882
2619882
2709901
28010891
29010891
30010891
31010891

Wind in May

Winds average 4 km/h in May.

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

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
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 30 min at the start of May to 12 h 48 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 5:40 AM, and sunset from 6:19 PM to 6:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:486:19
212.55:476:19
312.55:476:19
412.55:466:19
512.65:466:20
612.65:466:20
712.65:456:20
812.65:456:20
912.65:446:21
1012.65:446:21
1112.65:446:21
1212.65:436:21
1312.65:436:22
1412.75:436:22
1512.75:426:22
1612.75:426:23
1712.75:426:23
1812.75:426:23
1912.75:416:23
2012.75:416:24
2112.75:416:24
2212.75:416:24
2312.75:416:25
2412.75:406:25
2512.85:406:25
2612.85:406:26
2712.85:406:26
2812.85:406:26
2912.85:406:27
3012.85:406:27
3112.85:406:27

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.54 kWh/m².

For context, solar energy here swings from a low near 4.41 kWh/m² to a high of 6.16 kWh/m² in April across the year — May's 5.54 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Bright
36.0Bright
46.0Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.8Bright
105.8Bright
115.8Bright
125.7Bright
135.7Bright
145.7Bright
155.6Bright
165.6Bright
175.5Bright
185.5Bright
195.4Bright
205.4Bright
215.4Bright
225.3Bright
235.3Bright
245.2Bright
255.2Bright
265.2Bright
275.1Bright
285.1Bright
295.1Bright
305.0Bright
315.0Bright
Planning a trip in May

Hazard calendar for San Francisco Zapotitlán

In seasonPeak

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

San Francisco Zapotitlán sits in the Atlantic hurricane belt; the season peaks August–October.

San Francisco Zapotitlán's rainy season runs May–October, when most of the year's rain falls.

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

Is May a good time to visit San Francisco Zapotitlán?

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

2.9
Sightseeing
8th-best month of the year
4.0
Beach & pool
7th-best month of the year

May is a weaker month for outdoor sightseeing in San Francisco Zapotitlán.

What to pack for San Francisco Zapotitlán in May

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

In May, San Francisco Zapotitlán sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 29 days see rain.

light clothesrain gearsun protection

Sea temperature near San Francisco Zapotitlán in May

The nearest coast averages about 30°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 53 km away) is warmest in July at about 30°C and coldest in February near 29°C.

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

28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov30Tropical
Dec29Tropical

UV index in San Francisco Zapotitlán 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 San Francisco Zapotitlán peaks around March 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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 highMar 21UV 12Dec 14UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar12Extreme
Apr12Extreme
May11Extreme
Jun12Extreme
Jul11Extreme
Aug11Extreme
Sep11Extreme
Oct10Extreme
Nov8Very high
Dec8Very high

Air quality in San Francisco Zapotitlán 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 San Francisco Zapotitlán is worst in December — around 45 µg/m³ PM2.5 (poor), about 1.6× the cleanest month (June, 28 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorDec 2145 µg/m³Jun 2228 µg/m³
PM2.5 (µg/m³)Level
Jan44Poor
Feb45Poor
Mar41Poor
Apr44Poor
May40Poor
Jun28Moderate
Jul29Moderate
Aug29Moderate
Sep29Moderate
Oct30Moderate
Nov37Poor
Dec45Poor
Location & terrain

Where is San Francisco Zapotitlán?

San Francisco Zapotitlán sits at 14.6°N, 91.5°W, 635 m above sea level, in Guatemala. The nearest listed city is Mazatenango, 6.0 km away.

Topography around San Francisco Zapotitlán

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

Within 3 km, the terrain around San Francisco Zapotitlán has significant variations in elevation — a maximum elevation change of 348 m around an average of 635 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 3,376 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,178 m.

The land around San Francisco Zapotitlán is covered by trees (77%) within 3 km, trees (80%) within 16 km, and trees (57%) within 80 km.

3 km
348 m
16 km
3,376 m
80 km
4,178 m
treesgrasslandcroplandartificial surfaceswatermangroves
May weather nearby: Mazatenango 6.0 km · San Pablo Jocopilas 7.0 km · San Felipe 9.0 km · El Palmar 9.0 km · San Sebastián 14 km · Retalhuleu 18 km · Nuevo San Carlos 19 km · Chicacao 22 km

Guatemala travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 43% of US
price level, 2025
GDP per capita
$6,598
2025
Happiness
6.5 / 10
World Happiness, 2025
Safe drinking water
49%
of population, 2024
Homicide rate
23.4
per 100k, 2023
Road deaths
22.9
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 510
Religion
Evangelical 46%Roman Catholic 42%none 11%

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 San Francisco Zapotitlán (14.5894°, -91.5214°, elevation 635 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).