Tolú Viejo weather in May

In May, Tolú Viejo sees average daytime highs of 31°C and overnight lows near 25°C, with 263 mm of rain across 29.5 wet days and about 12.4 hours of daylight. It is the 8th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°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 Tolú Viejo's 11th-clearest and 11th-windiest month. For the whole year in context, see Tolú Viejo's year-round climate.

Daytime high
31°
8th warmest
Overnight low
25°
10th coldest
Rainfall
263 mm
29.5 wet days
Daylight
12 h 24 min
5:45 AM – 6:11 PM
Cloud cover
91%
11th clearest
Wind
6 km/h
11th windiest
Solar energy
4.82 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 31°C through the month.

A typical May day in Tolú Viejo reaches about 31°C in the afternoon and slips back to 25°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 32°C. Set against its neighbours, May runs on par with April and on par with June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13125
23125
33125
43125
53125
63125
73125
83125
93125
103125
113125
123125
133125
143125
153125
163125
173125
183125
193125
203125
213125
223125
233125
243125
253125
263125
273125
283125
293125
303125
313125

How May really feels in Tolú Viejo

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.

Tolú Viejo weather by month

How May compares with the rest of the year at a glance. May is the 8th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 24°277.811.54.6
Feb32° / 25°317.811.74.2
Mar32° / 25°6615.511.93.5
Apr31° / 25°16725.612.22.7
May31° / 25°26329.512.42.4
Jun31° / 25°24928.112.52.4
Jul31° / 25°2282812.52.5
Aug31° / 25°2392912.32.5
Sep30° / 24°24029.112.12.5
Oct30° / 24°24029.811.82.6
Nov30° / 24°18027.211.62.8
Dec31° / 24°871811.53.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 4% of May, with mostly cloudy or overcast conditions the remaining 94%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1694
2694
3694
4694
5694
6694
7595
8595
9595
10595
11595
12595
13595
14595
15595
16595
17595
18595
19595
20595
21595
22595
23595
24595
25595
26595
27694
28694
29694
30793
31793

Chance of precipitation in May

Any precipitation

Tolú Viejo gets around 263 mm of rain over 29.5 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 95% and peaks near 96% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
194
294
394
494
594
694
794
894
994
1094
1194
1294
1394
1494
1594
1694
1795
1895
1995
2096
2196
2296
2396
2496
2596
2696
2796
2896
2996
3096
3196

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 91% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
11189
21189
31090
41090
51090
6991
7991
8892
9892
10892
11793
12793
13793
14793
15793
16793
17793
18793
19892
20892
21991
22991
231090
241090
251090
261090
271189
281189
291189
301189
311090

Wind in May

Winds average 6 km/h in May.

Across May, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

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 5:49 AM to 5:44 AM, and sunset from 6:09 PM to 6:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:496:09
212.35:496:09
312.35:486:09
412.45:486:09
512.45:486:09
612.45:476:09
712.45:476:09
812.45:476:10
912.45:476:10
1012.45:466:10
1112.45:466:10
1212.45:466:10
1312.45:466:10
1412.45:456:11
1512.45:456:11
1612.45:456:11
1712.45:456:11
1812.45:456:11
1912.45:456:12
2012.55:446:12
2112.55:446:12
2212.55:446:12
2312.55:446:12
2412.55:446:13
2512.55:446:13
2612.55:446:13
2712.55:446:13
2812.55:446:14
2912.55:446:14
3012.55:446:14
3112.55:446:14

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.82 kWh/m².

For context, solar energy here swings from a low near 4.49 kWh/m² to a high of 5.9 kWh/m² in March across the year — May's 4.82 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in May

Is May a good time to visit Tolú Viejo?

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
3.6
Beach & pool
11th-best month of the year

May is a weaker month for outdoor sightseeing in Tolú Viejo.

What to pack for Tolú Viejo in May

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

In May, Tolú Viejo sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 30 days see rain.

light clothesrain gearsun protection

Sea temperature near Tolú Viejo 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 28 km away) is warmest in July at about 30°C and coldest in March near 28°C.

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

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb28Tropical
Mar28Tropical
Apr29Tropical
May29Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Tolú Viejo in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tolú Viejo peaks around June 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highJun 10UV 13Dec 13UV 10
UV index (midday)Level
Jan11Extreme
Feb12Extreme
Mar12Extreme
Apr12Extreme
May13Extreme
Jun13Extreme
Jul11Extreme
Aug12Extreme
Sep12Extreme
Oct12Extreme
Nov10Very high
Dec10Very high

Air quality in Tolú Viejo 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 Tolú Viejo is worst in July — around 26 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (November, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateMar 2325 µg/m³Nov 1111 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb18Moderate
Mar26Moderate
Apr25Moderate
May25Moderate
Jun23Moderate
Jul26Moderate
Aug20Moderate
Sep14Moderate
Oct12Good
Nov11Good
Dec14Moderate
Location & terrain

Where is Tolú Viejo?

Tolú Viejo sits at 9.5°N, 75.4°W, 68 m above sea level, in Colombia. The nearest listed city is Sincelejo, 17 km away.

Topography around Tolú Viejo

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

Within 3 km, the terrain around Tolú Viejo has significant variations in elevation — a maximum elevation change of 260 m around an average of 88 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 579 m; within 80 km, large variations in elevation — a maximum elevation change of 810 m.

The land around Tolú Viejo is covered by grassland (58%) and trees (39%) within 3 km, grassland (68%) and trees (31%) within 16 km, and grassland (53%), trees (21%) and water (21%) within 80 km.

3 km
260 m
16 km
579 m
80 km
810 m
treesgrasslandartificial surfaceswaterwetlandmangroves
May weather nearby: Sincelejo 17 km · Santiago de Tolú 18 km · Corozal 22 km · Sampués 30 km · San Onofre 33 km · Momil 35 km · San Antero 36 km · Chinú 39 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 Tolú Viejo (9.4508°, -75.4386°, elevation 68 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. 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).