Guamal weather in May

In May, Guamal sees average daytime highs of 32°C and overnight lows near 25°C, with 383 mm of rain across 29 wet days and about 12.4 hours of daylight. It is the 9th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 1% of the time in May, and the air most often feels miserable.

Daylight stretches from about 12 h 18 min at the start of May to 12 h 30 min by month's end. Set against the rest of the year, May is Guamal's 12th-clearest and 10th-windiest month. For the whole year in context, see Guamal's year-round climate.

Daytime high
32°
9th warmest
Overnight low
25°
9th coldest
Rainfall
383 mm
29 wet days
Daylight
12 h 24 min
5:41 AM – 6:06 PM
Cloud cover
92%
12th clearest
Wind
4 km/h
10th windiest
Solar energy
4.72 kWh/m²
Travel score
2.1
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical May day in Guamal reaches about 32°C in the afternoon and slips back to 25°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 34°C. Set against its neighbours, May runs about 1°C cooler than April and on par with June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13225
23225
33225
43225
53225
63225
73225
83225
93225
103225
113225
123225
133225
143225
153225
163225
173225
183225
193225
203225
213225
223225
233225
243225
253225
263225
273225
283225
293225
303225
313225

How May really feels in Guamal

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
31 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.

Guamal weather by month

How May compares with the rest of the year at a glance. May is the 9th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan34° / 25°337.411.53.5
Feb35° / 26°478.211.72.8
Mar34° / 26°11716.611.92.4
Apr33° / 25°27025.512.22.1
May32° / 25°3832912.42.1
Jun32° / 25°29526.212.52.2
Jul33° / 25°2382512.52.3
Aug32° / 25°2772612.32.2
Sep32° / 25°31628.212.12.2
Oct31° / 24°32429.211.82.3
Nov31° / 24°23826.211.62.5
Dec32° / 25°10316.911.53.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in May, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 3% of May, with mostly cloudy or overcast conditions the remaining 95%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1694
2694
3694
4595
5595
6595
7595
8496
9496
10496
11496
12496
13496
14496
15496
16496
17496
18496
19496
20496
21496
22496
23595
24595
25595
26595
27595
28694
29793
30793
31793

Chance of precipitation in May

Any precipitation

Guamal gets around 383 mm of rain over 29 wet days in May, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 93% and peaks near 94% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
192
292
392
492
592
692
792
892
992
1092
1192
1292
1392
1492
1592
1692
1793
1893
1993
2093
2194
2294
2394
2494
2594
2694
2794
2894
2993
3093
3193

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the miserable band about 99% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
1298
2298
3298
4199
5199
6199
7199
8199
9199
10199
11199
12199
13199
14199
15199
16199
17199
18199
19199
20199
21298
22298
23298
24298
25298
26298
27298
28298
29199
30199
31199

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 18 min at the start of May to 12 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over May. Sunrise moves from 5:45 AM to 5:40 AM, and sunset from 6:04 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:456:04
212.35:446:04
312.35:446:04
412.35:446:04
512.35:436:04
612.45:436:04
712.45:436:04
812.45:426:04
912.45:426:05
1012.45:426:05
1112.45:426:05
1212.45:416:05
1312.45:416:05
1412.45:416:05
1512.45:416:05
1612.45:416:06
1712.45:406:06
1812.45:406:06
1912.45:406:06
2012.45:406:06
2112.45:406:07
2212.45:406:07
2312.55:406:07
2412.55:406:07
2512.55:406:08
2612.55:406:08
2712.55:406:08
2812.55:406:08
2912.55:406:08
3012.55:406:09
3112.55:406:09

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.72 kWh/m².

For context, solar energy here swings from a low near 4.44 kWh/m² to a high of 6.01 kWh/m² in March across the year — May's 4.72 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in May

Is May a good time to visit Guamal?

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

2.1
Sightseeing
11th-best month of the year
3.5
Beach & pool
12th-best month of the year

May is a weaker month for outdoor sightseeing in Guamal.

What to pack for Guamal in May

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

In May, Guamal sees daytime highs around 32°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 29 days see rain.

light clothesrain gearsun protection

UV index in Guamal 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 Guamal peaks around March 14 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 9 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highMar 14UV 13Dec 13UV 9
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar13Extreme
Apr12Extreme
May12Extreme
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep13Extreme
Oct12Extreme
Nov10Very high
Dec9Very high

Air quality in Guamal 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 Guamal is worst in March — around 47 µg/m³ PM2.5 (poor), about 4.2× the cleanest month (December, 11 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateGoodMar 1744 µg/m³Dec 1211 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb26Moderate
Mar47Poor
Apr27Moderate
May22Moderate
Jun21Moderate
Jul21Moderate
Aug17Moderate
Sep13Moderate
Oct13Moderate
Nov12Good
Dec11Good
Location & terrain

Where is Guamal?

Guamal sits at 9.1°N, 74.2°W, 28 m above sea level, in Colombia. The nearest listed city is Mompós, 25 km away.

Topography around Guamal

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

Within 3 km, the terrain around Guamal has only modest variations in elevation — a maximum elevation change of 15 m around an average of 24 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 40 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,347 m.

The land around Guamal is covered by grassland (67%) and trees (22%) within 3 km, grassland (65%) within 16 km, and grassland (58%) and trees (22%) within 80 km.

3 km
15 m
16 km
40 m
80 km
1,347 m
treesgrasslandartificial surfaceswaterwetland
May weather nearby: Mompós 25 km · El Banco 31 km · Pinillos 37 km · Chimichagua 47 km · Astrea 48 km · Magangué 59 km · Tiquisio 65 km · Sucre 66 km

Colombia travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type A / B
120 / 240 V · 60 Hz
Prices
≈ 38% of US
price level, 2025
GDP per capita
$8,562
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
74%
of population, 2024
Homicide rate
24.9
per 100k, 2023
Road deaths
15.4
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 480
Religion
Roman Catholic 64%Protestant 17%none 14%atheist 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 Guamal (9.1433°, -74.2238°, elevation 28 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).