Tumaco weather in May

In May, Tumaco sees average daytime highs of 27°C and overnight lows near 25°C, with 404 mm of rain across 28.4 wet days and about 12.1 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 1% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of May to 12 h 06 min by month's end. Set against the rest of the year, May is Tumaco's 7th-clearest and 8th-windiest month. For the whole year in context, see Tumaco's year-round climate.

Daytime high: 27°; 1st warmest
Overnight low: 25°; 12th coldest
Rainfall: 404 mm; 28.4 wet days
Daylight: 12 h 06 min; 6:09 AM – 6:14 PM
Cloud cover: 86%; 7th clearest
Wind: 11 km/h; 8th windiest
Solar energy: 4.09 kWh/m²
Travel score: 3.6; out of 10

← April Tumaco year-round climate June →Best places to visit in May

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical May day in Tumaco reaches about 27°C in the afternoon and slips back to 25°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 28°C. Set against its neighbours, May runs on par with April and on par with June.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	27	27	27	28	28	28	28	28	28	28	28	28	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27	27
Avg low (°C)	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25

	Avg high (°C)	Avg low (°C)
1	27	25
2	27	25
3	27	25
4	28	25
5	28	25
6	28	25
7	28	25
8	28	25
9	28	25
10	28	25
11	28	25
12	28	25
13	27	25
14	27	25
15	27	25
16	27	25
17	27	25
18	27	25
19	27	25
20	27	25
21	27	25
22	27	25
23	27	25
24	27	25
25	27	25
26	27	25
27	27	25
28	27	25
29	27	25
30	27	25
31	27	25

Tumaco weather by month

How May compares with the rest of the year at a glance. May is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	27° / 24°	461	28.7	11.9	3.7
Feb	27° / 25°	327	23.9	11.9	3.9
Mar	27° / 25°	293	23.9	12	4.2
Apr	27° / 25°	379	25.6	12	3.9
May	27° / 25°	404	28.4	12.1	3.6
Jun	27° / 25°	288	27	12.1	3.7
Jul	27° / 24°	248	27.4	12.1	3.7
Aug	27° / 24°	210	27.1	12.1	3.8
Sep	27° / 24°	230	25.8	12	3.9
Oct	27° / 24°	270	25.5	12	4.0
Nov	26° / 24°	199	21.9	11.9	4.4
Dec	27° / 24°	312	25.5	11.9	4.1

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 8% of May, with mostly cloudy or overcast conditions the remaining 91%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	10	10	10	10	10	9	9	9	9	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	9	9	9	9	8	8
Cloudier (%)	90	90	90	90	90	91	91	91	91	92	92	92	92	92	92	92	92	92	92	92	92	92	92	92	92	91	91	91	91	92	92

	Clearer (%)	Cloudier (%)
1	10	90
2	10	90
3	10	90
4	10	90
5	10	90
6	9	91
7	9	91
8	9	91
9	9	91
10	8	92
11	8	92
12	8	92
13	8	92
14	8	92
15	8	92
16	8	92
17	8	92
18	8	92
19	8	92
20	8	92
21	8	92
22	8	92
23	8	92
24	8	92
25	8	92
26	9	91
27	9	91
28	9	91
29	9	91
30	8	92
31	8	92

Chance of precipitation in May

Any precipitation

Tumaco gets around 404 mm of rain over 28.4 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 94% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	93	93	93	93	93	94	94	94	94	94	93	93	93	93	92	92	91	91	90	90	90	89	89	89	89	88	88	88	89	89	89

	Rain chance (%)
1	93
2	93
3	93
4	93
5	93
6	94
7	94
8	94
9	94
10	94
11	93
12	93
13	93
14	93
15	92
16	92
17	91
18	91
19	90
20	90
21	90
22	89
23	89
24	89
25	89
26	88
27	88
28	88
29	89
30	89
31	89

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 77% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Oppressive (%)	77	76	76	75	75	74	73	73	72	72	71	71	71	71	72	72	73	74	75	76	78	79	81	82	83	84	85	86	87	88	89
Miserable (%)	23	24	24	25	25	26	27	27	28	28	29	29	29	29	28	28	27	26	25	24	22	21	19	18	17	16	15	14	13	12	11

	Oppressive (%)	Miserable (%)
1	77	23
2	76	24
3	76	24
4	75	25
5	75	25
6	74	26
7	73	27
8	73	27
9	72	28
10	72	28
11	71	29
12	71	29
13	71	29
14	71	29
15	72	28
16	72	28
17	73	27
18	74	26
19	75	25
20	76	24
21	78	22
22	79	21
23	81	19
24	82	18
25	83	17
26	84	16
27	85	15
28	86	14
29	87	13
30	88	12
31	89	11

Wind in May

Winds average 11 km/h in May.

Across May, daily wind ranges from about 10 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	10	10	10	10	10	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	12	12	12	12	12	12	12
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	10	calm
2	10	calm
3	10	calm
4	10	calm
5	10	calm
6	11	calm
7	11	calm
8	11	calm
9	11	calm
10	11	calm
11	11	calm
12	11	calm
13	11	calm
14	11	calm
15	11	calm
16	11	calm
17	11	calm
18	11	calm
19	11	calm
20	11	calm
21	11	calm
22	11	calm
23	11	calm
24	11	calm
25	12	calm
26	12	calm
27	12	calm
28	12	calm
29	12	calm
30	12	calm
31	12	calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 06 min at the start of May to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over May. Sunrise moves from 6:11 AM to 6:10 AM, and sunset from 6:14 PM to 6:15 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1
Sunrise (AM)	6:11	6:10	6:10	6:10	6:10	6:10	6:10	6:10	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:09	6:10	6:10
Sunset (PM)	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:14	6:15	6:15	6:15	6:15	6:15	6:15	6:15

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.1	6:11	6:14
2	12.1	6:10	6:14
3	12.1	6:10	6:14
4	12.1	6:10	6:14
5	12.1	6:10	6:14
6	12.1	6:10	6:14
7	12.1	6:10	6:14
8	12.1	6:10	6:14
9	12.1	6:09	6:14
10	12.1	6:09	6:14
11	12.1	6:09	6:14
12	12.1	6:09	6:14
13	12.1	6:09	6:14
14	12.1	6:09	6:14
15	12.1	6:09	6:14
16	12.1	6:09	6:14
17	12.1	6:09	6:14
18	12.1	6:09	6:14
19	12.1	6:09	6:14
20	12.1	6:09	6:14
21	12.1	6:09	6:14
22	12.1	6:09	6:14
23	12.1	6:09	6:14
24	12.1	6:09	6:14
25	12.1	6:09	6:15
26	12.1	6:09	6:15
27	12.1	6:09	6:15
28	12.1	6:09	6:15
29	12.1	6:09	6:15
30	12.1	6:10	6:15
31	12.1	6:10	6:15

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.09 kWh/m².

For context, solar energy here swings from a low near 3.93 kWh/m² to a high of 4.76 kWh/m² in March across the year — May's 4.09 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	4.2	4.2	4.2	4.2	4.2	4.2	4.2	4.1	4.1	4.1	4.1	4.1	4.1	4.1	4.1	4.1	4.1	4.1	4.1	4.1	4.1	4.0	4.0	4.0	4.0	4.0	4.0	4.0	4.0	4.0	4.0
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Moderate

	Solar energy (kWh/m²)	Level
1	4.2	Bright
2	4.2	Bright
3	4.2	Bright
4	4.2	Bright
5	4.2	Bright
6	4.2	Bright
7	4.2	Bright
8	4.1	Bright
9	4.1	Bright
10	4.1	Bright
11	4.1	Bright
12	4.1	Bright
13	4.1	Bright
14	4.1	Bright
15	4.1	Bright
16	4.1	Bright
17	4.1	Bright
18	4.1	Bright
19	4.1	Bright
20	4.1	Bright
21	4.1	Bright
22	4.0	Bright
23	4.0	Bright
24	4.0	Bright
25	4.0	Bright
26	4.0	Bright
27	4.0	Bright
28	4.0	Bright
29	4.0	Bright
30	4.0	Bright
31	4.0	Moderate

Planning a trip in May

Is May a good time to visit Tumaco?

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

3.6

Sightseeing

12th-best month of the year

3.8

Beach & pool

10th-best month of the year

May is a weaker month for outdoor sightseeing in Tumaco.

What to pack for Tumaco in May

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

In May, Tumaco sees daytime highs around 27°C and nights near 25°C. Pack light clothes and rain gear. About 28 days see rain.

light clothesrain gear

Sea temperature near Tumaco in May

The nearest coast averages about 28°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 13 km away) is warmest in May at about 28°C and coldest in December near 27°C.

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	27	27	27	28	28	27	27	27	27	27	27	27
Comfort	Warm	Warm	Warm	Warm	Warm	Warm	Warm	Warm	Warm	Warm	Warm	Warm

	Sea temperature (°C)	Comfort
Jan	27	Warm
Feb	27	Warm
Mar	27	Warm
Apr	28	Warm
May	28	Warm
Jun	27	Warm
Jul	27	Warm
Aug	27	Warm
Sep	27	Warm
Oct	27	Warm
Nov	27	Warm
Dec	27	Warm

UV index in Tumaco 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 Tumaco peaks around February 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 20 at about 11 (extreme).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	14	15	14	13	12	11	11	11	12	13	11	11
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	15	Extreme
Mar	14	Extreme
Apr	13	Extreme
May	12	Extreme
Jun	11	Extreme
Jul	11	Extreme
Aug	11	Extreme
Sep	12	Extreme
Oct	13	Extreme
Nov	11	Extreme
Dec	11	Extreme

Air quality in Tumaco 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 Tumaco is worst in March — around 17 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (July, 8 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	10	13	17	14	11	9	8	9	9	10	13	12
Level	Good	Moderate	Moderate	Moderate	Good	Good	Good	Good	Good	Good	Moderate	Good

	PM2.5 (µg/m³)	Level
Jan	10	Good
Feb	13	Moderate
Mar	17	Moderate
Apr	14	Moderate
May	11	Good
Jun	9	Good
Jul	8	Good
Aug	9	Good
Sep	9	Good
Oct	10	Good
Nov	13	Moderate
Dec	12	Good

Location & terrain

Where is Tumaco?

Tumaco sits at 1.8°N, 78.8°W, 1 m above sea level, in Colombia. The nearest listed city is San Lorenzo de Esmeraldas, 56 km away.

Topography around Tumaco

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

Within 3 km, the terrain around Tumaco has only modest variations in elevation — a maximum elevation change of 25 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 70 m; within 80 km, large variations in elevation — a maximum elevation change of 748 m.

The land around Tumaco is covered by mangroves (44%) and water (30%) within 3 km, water (53%) and trees (27%) within 16 km, and trees (53%) and water (40%) within 80 km.

3 km

25 m

mangroves 44%

16 km

70 m

water 53%

80 km

748 m

trees 53%

treesgrasslandartificial surfacesbare terrainwaterwetlandmangroves

← April Tumaco year-round climate June →Best places to visit in May

May weather nearby: San Lorenzo de Esmeraldas 56 km · El Charco 108 km · Esmeraldas 133 km · Samaniego 142 km · Providencia 150 km · Túquerres 152 km · Tulcán 162 km · Pupiales 164 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

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 Tumaco (1.7911°, -78.7927°, elevation 1 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).

	Avg high (°C)	Avg low (°C)
1	27	25
2	27	25
3	27	25
4	28	25
5	28	25
6	28	25
7	28	25
8	28	25
9	28	25
10	28	25
11	28	25
12	28	25
13	27	25
14	27	25
15	27	25
16	27	25
17	27	25
18	27	25
19	27	25
20	27	25
21	27	25
22	27	25
23	27	25
24	27	25
25	27	25
26	27	25
27	27	25
28	27	25
29	27	25
30	27	25
31	27	25

	Clearer (%)	Cloudier (%)
1	10	90
2	10	90
3	10	90
4	10	90
5	10	90
6	9	91
7	9	91
8	9	91
9	9	91
10	8	92
11	8	92
12	8	92
13	8	92
14	8	92
15	8	92
16	8	92
17	8	92
18	8	92
19	8	92
20	8	92
21	8	92
22	8	92
23	8	92
24	8	92
25	8	92
26	9	91
27	9	91
28	9	91
29	9	91
30	8	92
31	8	92

	Rain chance (%)
1	93
2	93
3	93
4	93
5	93
6	94
7	94
8	94
9	94
10	94
11	93
12	93
13	93
14	93
15	92
16	92
17	91
18	91
19	90
20	90
21	90
22	89
23	89
24	89
25	89
26	88
27	88
28	88
29	89
30	89
31	89

	Oppressive (%)	Miserable (%)
1	77	23
2	76	24
3	76	24
4	75	25
5	75	25
6	74	26
7	73	27
8	73	27
9	72	28
10	72	28
11	71	29
12	71	29
13	71	29
14	71	29
15	72	28
16	72	28
17	73	27
18	74	26
19	75	25
20	76	24
21	78	22
22	79	21
23	81	19
24	82	18
25	83	17
26	84	16
27	85	15
28	86	14
29	87	13
30	88	12
31	89	11

	Avg high (°C)	Avg low (°C)
1	27	25
2	27	25
3	27	25
4	28	25
5	28	25
6	28	25
7	28	25
8	28	25
9	28	25
10	28	25
11	28	25
12	28	25
13	27	25
14	27	25
15	27	25
16	27	25
17	27	25
18	27	25
19	27	25
20	27	25
21	27	25
22	27	25
23	27	25
24	27	25
25	27	25
26	27	25
27	27	25
28	27	25
29	27	25
30	27	25
31	27	25

	Clearer (%)	Cloudier (%)
1	10	90
2	10	90
3	10	90
4	10	90
5	10	90
6	9	91
7	9	91
8	9	91
9	9	91
10	8	92
11	8	92
12	8	92
13	8	92
14	8	92
15	8	92
16	8	92
17	8	92
18	8	92
19	8	92
20	8	92
21	8	92
22	8	92
23	8	92
24	8	92
25	8	92
26	9	91
27	9	91
28	9	91
29	9	91
30	8	92
31	8	92

	Rain chance (%)
1	93
2	93
3	93
4	93
5	93
6	94
7	94
8	94
9	94
10	94
11	93
12	93
13	93
14	93
15	92
16	92
17	91
18	91
19	90
20	90
21	90
22	89
23	89
24	89
25	89
26	88
27	88
28	88
29	89
30	89
31	89

	Oppressive (%)	Miserable (%)
1	77	23
2	76	24
3	76	24
4	75	25
5	75	25
6	74	26
7	73	27
8	73	27
9	72	28
10	72	28
11	71	29
12	71	29
13	71	29
14	71	29
15	72	28
16	72	28
17	73	27
18	74	26
19	75	25
20	76	24
21	78	22
22	79	21
23	81	19
24	82	18
25	83	17
26	84	16
27	85	15
28	86	14
29	87	13
30	88	12
31	89	11

	Avg high (°C)	Avg low (°C)
1	27	25
2	27	25
3	27	25
4	28	25
5	28	25
6	28	25
7	28	25
8	28	25
9	28	25
10	28	25
11	28	25
12	28	25
13	27	25
14	27	25
15	27	25
16	27	25
17	27	25
18	27	25
19	27	25
20	27	25
21	27	25
22	27	25
23	27	25
24	27	25
25	27	25
26	27	25
27	27	25
28	27	25
29	27	25
30	27	25
31	27	25

	Clearer (%)	Cloudier (%)
1	10	90
2	10	90
3	10	90
4	10	90
5	10	90
6	9	91
7	9	91
8	9	91
9	9	91
10	8	92
11	8	92
12	8	92
13	8	92
14	8	92
15	8	92
16	8	92
17	8	92
18	8	92
19	8	92
20	8	92
21	8	92
22	8	92
23	8	92
24	8	92
25	8	92
26	9	91
27	9	91
28	9	91
29	9	91
30	8	92
31	8	92

	Rain chance (%)
1	93
2	93
3	93
4	93
5	93
6	94
7	94
8	94
9	94
10	94
11	93
12	93
13	93
14	93
15	92
16	92
17	91
18	91
19	90
20	90
21	90
22	89
23	89
24	89
25	89
26	88
27	88
28	88
29	89
30	89
31	89

	Oppressive (%)	Miserable (%)
1	77	23
2	76	24
3	76	24
4	75	25
5	75	25
6	74	26
7	73	27
8	73	27
9	72	28
10	72	28
11	71	29
12	71	29
13	71	29
14	71	29
15	72	28
16	72	28
17	73	27
18	74	26
19	75	25
20	76	24
21	78	22
22	79	21
23	81	19
24	82	18
25	83	17
26	84	16
27	85	15
28	86	14
29	87	13
30	88	12
31	89	11