Melchor de Mencos weather in May

In May, Melchor de Mencos sees average daytime highs of 35°C and overnight lows near 23°C, with 78 mm of rain across 11.1 wet days and about 12.8 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 30% 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 Melchor de Mencos's 6th-clearest and 4th-windiest month. For the whole year in context, see Melchor de Mencos's year-round climate.

Daytime high
35°
2nd warmest
Overnight low
23°
9th coldest
Rainfall
78 mm
11.1 wet days
Daylight
12 h 48 min
5:29 AM – 6:17 PM
Cloud cover
58%
6th clearest
Wind
9 km/h
4th windiest
Solar energy
5.82 kWh/m²
Travel score
2.4
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 35°C through the month.

A typical May day in Melchor de Mencos reaches about 35°C in the afternoon and slips back to 23°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 38°C. Set against its neighbours, May runs on par with April and about 2°C warmer than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13623
23623
33623
43623
53623
63523
73523
83523
93523
103523
113523
123523
133523
143523
153523
163523
173523
183523
193523
203523
213523
223524
233524
243524
253424
263424
273424
283424
293424
303424
313424

How May really feels in Melchor de Mencos

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
13 feel dangerously hot (≥ 39°C)
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.

Melchor de Mencos weather by month

How May compares with the rest of the year at a glance. May is the 2nd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 19°318.311.16.0
Feb31° / 19°194.911.45.2
Mar33° / 20°285.311.94.0
Apr35° / 22°314.912.42.8
May35° / 23°7811.112.82.4
Jun33° / 24°12419132.6
Jul33° / 23°6714.412.92.9
Aug34° / 23°9616.812.62.5
Sep33° / 23°14922.612.12.4
Oct31° / 22°13219.811.63.5
Nov29° / 20°7413.211.25.0
Dec29° / 19°429.7115.8

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 22% of May, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26436
36337
46337
56337
66139
76238
86139
96040
105941
115941
125842
135743
145644
155545
165446
175347
185248
195149
205050
214852
224753
234753
244456
254357
264258
273961
283862
293664
303565
313466

Chance of precipitation in May

Any precipitation

Melchor de Mencos gets around 78 mm of rain over 11.1 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 37% and peaks near 62% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
119
219
320
421
522
623
724
825
926
1027
1128
1229
1331
1432
1534
1635
1737
1838
1940
2042
2143
2245
2347
2449
2551
2653
2755
2857
2959
3061
3162

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 61% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1648442
2547462
3546472
4545492
5444502
6443512
7442531
8441541
9440551
10439561
11338581
12337591
13336601
14335611
15334621
16333631
17232642
18231652
19230662
20229672
21227683
22226693
23125704
24123715
25122716
26121708
27119719
281187110
291167211
301157212
310147313

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

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 5:36 AM to 5:26 AM, and sunset from 6:12 PM to 6:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:366:12
212.65:356:12
312.65:356:13
412.65:346:13
512.75:336:13
612.75:336:13
712.75:336:14
812.75:326:14
912.75:326:14
1012.75:316:15
1112.75:316:15
1212.85:306:15
1312.85:306:16
1412.85:306:16
1512.85:296:16
1612.85:296:17
1712.85:296:17
1812.85:286:17
1912.85:286:18
2012.85:286:18
2112.85:286:18
2212.95:276:19
2312.95:276:19
2412.95:276:20
2512.95:276:20
2612.95:276:20
2712.95:266:21
2812.95:266:21
2912.95:266:21
3012.95:266:22
3112.95:266:22

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.82 kWh/m².

For context, solar energy here swings from a low near 3.63 kWh/m² to a high of 6.08 kWh/m² in April across the year — May's 5.82 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.1Intense
46.1Intense
56.1Intense
66.1Intense
76.0Intense
86.0Intense
96.0Intense
106.0Bright
116.0Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.7Bright
215.7Bright
225.7Bright
235.6Bright
245.6Bright
255.6Bright
265.5Bright
275.5Bright
285.5Bright
295.4Bright
305.4Bright
315.4Bright
Planning a trip in May

Hazard calendar for Melchor de Mencos

In seasonPeak

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

Melchor de Mencos's rainy season runs August–November, 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 Melchor de Mencos?

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

2.4
Sightseeing
11th-best month of the year
5.2
Beach & pool
8th-best month of the year

May is a weaker month for outdoor sightseeing in Melchor de Mencos.

What to pack for Melchor de Mencos in May

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

In May, Melchor de Mencos sees daytime highs around 35°C and nights near 23°C. Pack light clothes. Worth having: rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

UV index in Melchor de Mencos 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 Melchor de Mencos peaks around April 10 at about 13 (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 highApr 10UV 13Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar13Extreme
Apr13Extreme
May10Extreme
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct11Extreme
Nov8Very high
Dec8Very high

Air quality in Melchor de Mencos 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 Melchor de Mencos is worst in May — around 30 µg/m³ PM2.5 (moderate), about 5.2× the cleanest month (December, 6 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1529 µg/m³Dec 186 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb7Good
Mar10Good
Apr28Moderate
May30Moderate
Jun26Moderate
Jul28Moderate
Aug19Moderate
Sep14Moderate
Oct10Good
Nov7Good
Dec6Good
Location & terrain

Where is Melchor de Mencos?

Melchor de Mencos sits at 17.1°N, 89.2°W, 0 m above sea level, in Guatemala. The nearest listed city is San Ignacio, 14 km away.

BelmopanFloresSan BenitoPoptúnHopkinsDangrigaCrooked Tree

Topography around Melchor de Mencos

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

Within 3 km, the terrain around Melchor de Mencos has only modest variations in elevation — a maximum elevation change of 173 m around an average of 141 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 502 m; within 80 km, large variations in elevation — a maximum elevation change of 1,117 m.

The land around Melchor de Mencos is covered by trees (60%) and grassland (28%) within 3 km, trees (67%) and grassland (31%) within 16 km, and trees (78%) within 80 km.

3 km
173 m
16 km
502 m
80 km
1,117 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: San Ignacio 14 km · Belmopan 46 km · Flores 81 km · San Benito 83 km · Poptún 86 km · Hopkins 95 km · Dangriga 98 km · Crooked Tree 102 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 Melchor de Mencos (17.0661°, -89.1523°, elevation 0 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).