Tumaco weather in September

In September, Tumaco sees average daytime highs of 27°C and overnight lows near 24°C, with 230 mm of rain across 25.8 wet days and about 12 hours of daylight. It is the 9th-warmest and 10th-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 0% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is Tumaco's 12th-clearest and 1st-windiest month. For the whole year in context, see Tumaco's year-round climate.

Daytime high: 27°; 9th warmest
Overnight low: 24°; 1st coldest
Rainfall: 230 mm; 25.8 wet days
Daylight: 12 hours; 6:09 AM – 6:10 PM
Cloud cover: 89%; 12th clearest
Wind: 14 km/h; 1st windiest
Solar energy: 4.22 kWh/m²
Travel score: 3.9; out of 10

← August Tumaco year-round climate October →Best places to visit in September

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

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

A typical September day in Tumaco reaches about 27°C in the afternoon and slips back to 24°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 27°C. Set against its neighbours, September runs on par with August and on par with October.

	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
Avg high (°C)	27	27	27	27	27	27	26	26	26	26	26	26	26	26	26	26	26	26	27	27	27	27	27	27	27	27	27	27	27	27
Avg low (°C)	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24

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

Tumaco weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 10th-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 September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 5% of September, with mostly cloudy or overcast conditions the remaining 95%.

	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
Clearer (%)	6	6	6	6	6	6	6	6	6	5	5	5	5	4	4	4	4	3	3	3	3	3	3	4	4	4	4	4	4	5
Cloudier (%)	94	94	94	94	94	94	94	94	94	95	95	95	95	96	96	96	96	97	97	97	97	97	97	96	96	96	96	96	96	95

	Clearer (%)	Cloudier (%)
1	6	94
2	6	94
3	6	94
4	6	94
5	6	94
6	6	94
7	6	94
8	6	94
9	6	94
10	5	95
11	5	95
12	5	95
13	5	95
14	4	96
15	4	96
16	4	96
17	4	96
18	3	97
19	3	97
20	3	97
21	3	97
22	3	97
23	3	97
24	4	96
25	4	96
26	4	96
27	4	96
28	4	96
29	4	96
30	5	95

Chance of precipitation in September

Any precipitation

Tumaco gets around 230 mm of rain over 25.8 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 86% and peaks near 88% 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
Rain chance (%)	85	85	85	85	85	85	85	85	85	85	85	85	85	85	85	85	85	85	86	86	86	86	87	87	87	87	87	88	88	87

	Rain chance (%)
1	85
2	85
3	85
4	85
5	85
6	85
7	85
8	85
9	85
10	85
11	85
12	85
13	85
14	85
15	85
16	85
17	85
18	85
19	86
20	86
21	86
22	86
23	87
24	87
25	87
26	87
27	87
28	88
29	88
30	87

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 99% of days. Sticky, muggy-or-worse air turns up on roughly 99% 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
Oppressive (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	99	99	99	99	99	99	99	99	99	99	99	99	99	99
Miserable (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1	1	1	1	1	1	1	1

	Oppressive (%)	Miserable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	99	1
18	99	1
19	99	1
20	99	1
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1

Wind in September

Winds average 14 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 14 km/h on the calmest days to 14 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
Wind speed (km/h)	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

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

Sunrise & sunset in September

DaylightNight

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

Days grow by about 0 minutes over September. Sunrise moves from 6:14 AM to 6:05 AM, and sunset from 6:16 PM to 6:04 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
Daylight (h)	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0
Sunrise (AM)	6:14	6:14	6:13	6:13	6:13	6:12	6:12	6:12	6:11	6:11	6:11	6:10	6:10	6:10	6:10	6:09	6:09	6:09	6:08	6:08	6:08	6:07	6:07	6:07	6:06	6:06	6:06	6:05	6:05	6:05
Sunset (PM)	6:16	6:16	6:15	6:15	6:14	6:14	6:14	6:13	6:13	6:12	6:12	6:11	6:11	6:11	6:10	6:10	6:09	6:09	6:09	6:08	6:08	6:07	6:07	6:06	6:06	6:06	6:05	6:05	6:04	6:04

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.0	6:14	6:16
2	12.0	6:14	6:16
3	12.0	6:13	6:15
4	12.0	6:13	6:15
5	12.0	6:13	6:14
6	12.0	6:12	6:14
7	12.0	6:12	6:14
8	12.0	6:12	6:13
9	12.0	6:11	6:13
10	12.0	6:11	6:12
11	12.0	6:11	6:12
12	12.0	6:10	6:11
13	12.0	6:10	6:11
14	12.0	6:10	6:11
15	12.0	6:10	6:10
16	12.0	6:09	6:10
17	12.0	6:09	6:09
18	12.0	6:09	6:09
19	12.0	6:08	6:09
20	12.0	6:08	6:08
21	12.0	6:08	6:08
22	12.0	6:07	6:07
23	12.0	6:07	6:07
24	12.0	6:07	6:06
25	12.0	6:06	6:06
26	12.0	6:06	6:06
27	12.0	6:06	6:05
28	12.0	6:05	6:05
29	12.0	6:05	6:04
30	12.0	6:05	6:04

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.22 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 — September's 4.22 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
Solar energy (kWh/m²)	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.3	4.2	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
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

	Solar energy (kWh/m²)	Level
1	4.3	Bright
2	4.3	Bright
3	4.3	Bright
4	4.3	Bright
5	4.3	Bright
6	4.3	Bright
7	4.3	Bright
8	4.3	Bright
9	4.3	Bright
10	4.3	Bright
11	4.3	Bright
12	4.3	Bright
13	4.2	Bright
14	4.2	Bright
15	4.2	Bright
16	4.2	Bright
17	4.2	Bright
18	4.2	Bright
19	4.2	Bright
20	4.2	Bright
21	4.1	Bright
22	4.1	Bright
23	4.1	Bright
24	4.1	Bright
25	4.1	Bright
26	4.1	Bright
27	4.1	Bright
28	4.1	Bright
29	4.1	Bright
30	4.1	Bright

Planning a trip in September

Is September a good time to visit Tumaco?

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

3.9

Sightseeing

5th-best month of the year

3.8

Beach & pool

7th-best month of the year

September is a weaker month for outdoor sightseeing in Tumaco.

What to pack for Tumaco in September

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

In September, Tumaco sees daytime highs around 27°C and nights near 24°C. Pack rain gear. Worth having: light clothes. About 26 days see rain.

rain gearlight clothes

Sea temperature near Tumaco in September

The nearest coast averages about 27°C in September — 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 September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September 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

← August Tumaco year-round climate October →Best places to visit in September

September 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	24
2	27	24
3	27	24
4	27	24
5	27	24
6	27	24
7	26	24
8	26	24
9	26	24
10	26	24
11	26	24
12	26	24
13	26	24
14	26	24
15	26	24
16	26	24
17	26	24
18	26	24
19	27	24
20	27	24
21	27	24
22	27	24
23	27	24
24	27	24
25	27	24
26	27	24
27	27	24
28	27	24
29	27	24
30	27	24

	Clearer (%)	Cloudier (%)
1	6	94
2	6	94
3	6	94
4	6	94
5	6	94
6	6	94
7	6	94
8	6	94
9	6	94
10	5	95
11	5	95
12	5	95
13	5	95
14	4	96
15	4	96
16	4	96
17	4	96
18	3	97
19	3	97
20	3	97
21	3	97
22	3	97
23	3	97
24	4	96
25	4	96
26	4	96
27	4	96
28	4	96
29	4	96
30	5	95

	Rain chance (%)
1	85
2	85
3	85
4	85
5	85
6	85
7	85
8	85
9	85
10	85
11	85
12	85
13	85
14	85
15	85
16	85
17	85
18	85
19	86
20	86
21	86
22	86
23	87
24	87
25	87
26	87
27	87
28	88
29	88
30	87

	Oppressive (%)	Miserable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	99	1
18	99	1
19	99	1
20	99	1
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1

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

	Clearer (%)	Cloudier (%)
1	6	94
2	6	94
3	6	94
4	6	94
5	6	94
6	6	94
7	6	94
8	6	94
9	6	94
10	5	95
11	5	95
12	5	95
13	5	95
14	4	96
15	4	96
16	4	96
17	4	96
18	3	97
19	3	97
20	3	97
21	3	97
22	3	97
23	3	97
24	4	96
25	4	96
26	4	96
27	4	96
28	4	96
29	4	96
30	5	95

	Rain chance (%)
1	85
2	85
3	85
4	85
5	85
6	85
7	85
8	85
9	85
10	85
11	85
12	85
13	85
14	85
15	85
16	85
17	85
18	85
19	86
20	86
21	86
22	86
23	87
24	87
25	87
26	87
27	87
28	88
29	88
30	87

	Oppressive (%)	Miserable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	99	1
18	99	1
19	99	1
20	99	1
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1

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

	Clearer (%)	Cloudier (%)
1	6	94
2	6	94
3	6	94
4	6	94
5	6	94
6	6	94
7	6	94
8	6	94
9	6	94
10	5	95
11	5	95
12	5	95
13	5	95
14	4	96
15	4	96
16	4	96
17	4	96
18	3	97
19	3	97
20	3	97
21	3	97
22	3	97
23	3	97
24	4	96
25	4	96
26	4	96
27	4	96
28	4	96
29	4	96
30	5	95

	Rain chance (%)
1	85
2	85
3	85
4	85
5	85
6	85
7	85
8	85
9	85
10	85
11	85
12	85
13	85
14	85
15	85
16	85
17	85
18	85
19	86
20	86
21	86
22	86
23	87
24	87
25	87
26	87
27	87
28	88
29	88
30	87

	Oppressive (%)	Miserable (%)
1	100	0
2	100	0
3	100	0
4	100	0
5	100	0
6	100	0
7	100	0
8	100	0
9	100	0
10	100	0
11	100	0
12	100	0
13	100	0
14	100	0
15	100	0
16	100	0
17	99	1
18	99	1
19	99	1
20	99	1
21	99	1
22	99	1
23	99	1
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1