Cocos weather in September

In September, Cocos sees average daytime highs of 33°C and overnight lows near 20°C, with 7 mm of rain across 1.2 wet days and about 11.9 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 32°C in the first days to 34°C by the end. The sky is clear or mostly clear about 64% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Cocos's 2nd-clearest and 1st-windiest month. For the whole year in context, see Cocos's year-round climate.

Daytime high: 33°; 2nd warmest
Overnight low: 20°; 5th coldest
Rainfall: 7 mm; 1.2 wet days
Daylight: 11 h 54 min; 5:55 AM – 5:50 PM
Cloud cover: 33%; 2nd clearest
Wind: 11 km/h; 1st windiest
Solar energy: 6.48 kWh/m²
Travel score: 4.6; out of 10

← August Cocos 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

Highs climb over the month, from about 32°C in the first days to 34°C by the end.

A typical September day in Cocos reaches about 33°C in the afternoon and slips back to 20°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 36°C. Set against its neighbours, September runs about 2°C warmer than 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)	32	32	32	32	32	32	32	32	32	32	33	33	33	33	33	33	33	33	33	33	33	33	33	33	33	34	34	34	34	34
Avg low (°C)	19	19	19	19	19	19	19	19	20	20	20	20	20	20	20	20	20	20	20	21	21	21	21	21	21	21	21	21	21	21

	Avg high (°C)	Avg low (°C)
1	32	19
2	32	19
3	32	19
4	32	19
5	32	19
6	32	19
7	32	19
8	32	19
9	32	20
10	32	20
11	33	20
12	33	20
13	33	20
14	33	20
15	33	20
16	33	20
17	33	20
18	33	20
19	33	20
20	33	21
21	33	21
22	33	21
23	33	21
24	33	21
25	33	21
26	34	21
27	34	21
28	34	21
29	34	21
30	34	21

How September really feels in Cocos

Once humidity and wind are folded in, September averages 28 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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Cocos weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	31° / 21°	130	13.1	12.7	4.3
Feb	31° / 21°	98	11.4	12.5	4.3
Mar	31° / 21°	127	12.7	12.1	4.4
Apr	31° / 21°	53	6.8	11.7	5.1
May	30° / 20°	8	1.7	11.4	5.9
Jun	29° / 18°	2	0.3	11.2	6.8
Jul	29° / 18°	0	0.1	11.2	7.0
Aug	31° / 18°	1	0.2	11.5	6.1
Sep	33° / 20°	7	1.2	11.9	4.6
Oct	33° / 22°	61	6.6	12.3	3.7
Nov	31° / 22°	165	15.2	12.7	3.8
Dec	30° / 21°	152	15.5	12.8	4.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 64% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 21%. Skies tend to cloud over as the month goes on.

	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 (%)	84	84	84	84	84	83	83	83	83	82	82	82	82	81	81	81	80	80	79	78	77	76	76	74	73	73	72	71	70	70
Cloudier (%)	16	16	16	16	16	17	17	17	17	18	18	18	18	19	19	19	20	20	21	22	23	24	24	26	27	27	28	29	30	30

	Clearer (%)	Cloudier (%)
1	84	16
2	84	16
3	84	16
4	84	16
5	84	16
6	83	17
7	83	17
8	83	17
9	83	17
10	82	18
11	82	18
12	82	18
13	82	18
14	81	19
15	81	19
16	81	19
17	80	20
18	80	20
19	79	21
20	78	22
21	77	23
22	76	24
23	76	24
24	74	26
25	73	27
26	73	27
27	72	28
28	71	29
29	70	30
30	70	30

Chance of precipitation in September

Any precipitation

Cocos gets around 7 mm of rain over 1.2 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 4% and peaks near 11% on the wettest days. The odds climb toward the end of the month.

	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 (%)	1	1	1	1	1	1	1	1	1	1	1	1	2	2	3	3	4	5	5	6	7	7	8	8	9	9	10	10	11	11

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

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 49% of days. It rarely turns muggy — the humid and sticky bands barely register.

	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
Dry (%)	63	62	62	62	61	61	61	60	60	59	58	57	55	55	52	51	49	47	45	43	41	39	37	36	34	32	31	29	28	27
Comfortable (%)	32	32	32	32	33	33	33	34	34	34	35	35	36	36	37	38	38	38	39	39	40	40	40	41	41	42	42	42	42	42
Humid (%)	5	6	6	6	6	6	6	6	6	7	7	7	8	8	9	9	10	11	12	13	14	15	16	17	17	18	19	20	20	21
Muggy (%)	0	0	0	0	0	0	0	0	0	0	0	1	1	1	2	2	3	4	4	5	5	6	7	7	8	8	9	9	10	10

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	63	32	5	0
2	62	32	6	0
3	62	32	6	0
4	62	32	6	0
5	61	33	6	0
6	61	33	6	0
7	61	33	6	0
8	60	34	6	0
9	60	34	6	0
10	59	34	7	0
11	58	35	7	0
12	57	35	7	1
13	55	36	8	1
14	55	36	8	1
15	52	37	9	2
16	51	38	9	2
17	49	38	10	3
18	47	38	11	4
19	45	39	12	4
20	43	39	13	5
21	41	40	14	5
22	39	40	15	6
23	37	40	16	7
24	36	41	17	7
25	34	41	17	8
26	32	42	18	8
27	31	42	19	9
28	29	42	20	9
29	28	42	20	10
30	27	42	21	10

Wind in September

Winds average 11 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 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)	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	10	10	10	10	10	10	10
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

	Wind speed (km/h)	Feels
1	11	calm
2	11	calm
3	11	calm
4	11	calm
5	11	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	10	calm
25	10	calm
26	10	calm
27	10	calm
28	10	calm
29	10	calm
30	10	calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over September. Sunrise moves from 6:06 AM to 5:44 AM, and sunset from 5:50 PM to 5:51 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)	11.7	11.7	11.7	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.1	12.1	12.1	12.1	12.1
Sunrise (AM)	6:06	6:05	6:05	6:04	6:03	6:03	6:02	6:01	6:00	5:59	5:59	5:58	5:57	5:56	5:56	5:55	5:54	5:53	5:52	5:52	5:51	5:50	5:49	5:49	5:48	5:47	5:46	5:46	5:45	5:44
Sunset (PM)	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:51	5:51	5:51	5:51	5:51

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.7	6:06	5:50
2	11.7	6:05	5:50
3	11.7	6:05	5:50
4	11.8	6:04	5:50
5	11.8	6:03	5:50
6	11.8	6:03	5:50
7	11.8	6:02	5:50
8	11.8	6:01	5:50
9	11.8	6:00	5:50
10	11.8	5:59	5:50
11	11.9	5:59	5:50
12	11.9	5:58	5:50
13	11.9	5:57	5:50
14	11.9	5:56	5:50
15	11.9	5:56	5:50
16	11.9	5:55	5:50
17	11.9	5:54	5:50
18	11.9	5:53	5:50
19	12.0	5:52	5:50
20	12.0	5:52	5:50
21	12.0	5:51	5:50
22	12.0	5:50	5:50
23	12.0	5:49	5:50
24	12.0	5:49	5:50
25	12.0	5:48	5:50
26	12.1	5:47	5:51
27	12.1	5:46	5:51
28	12.1	5:46	5:51
29	12.1	5:45	5:51
30	12.1	5:44	5:51

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.48 kWh/m².

For context, solar energy here swings from a low near 4.64 kWh/m² to a high of 6.51 kWh/m² in October across the year — September's 6.48 kWh/m² sits near the top of that range.

	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)	6.2	6.2	6.2	6.3	6.3	6.3	6.3	6.4	6.4	6.4	6.4	6.5	6.5	6.5	6.5	6.5	6.5	6.5	6.5	6.5	6.5	6.5	6.5	6.6	6.6	6.6	6.6	6.6	6.6	6.6
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	6.2	Intense
2	6.2	Intense
3	6.2	Intense
4	6.3	Intense
5	6.3	Intense
6	6.3	Intense
7	6.3	Intense
8	6.4	Intense
9	6.4	Intense
10	6.4	Intense
11	6.4	Intense
12	6.5	Intense
13	6.5	Intense
14	6.5	Intense
15	6.5	Intense
16	6.5	Intense
17	6.5	Intense
18	6.5	Intense
19	6.5	Intense
20	6.5	Intense
21	6.5	Intense
22	6.5	Intense
23	6.5	Intense
24	6.6	Intense
25	6.6	Intense
26	6.6	Intense
27	6.6	Intense
28	6.6	Intense
29	6.6	Intense
30	6.6	Intense

Planning a trip in September

Hazard calendar for Cocos

In seasonPeak

None of Cocos's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Cocos's rainy season runs November–March, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Cocos?

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

4.6

Sightseeing

6th-best month of the year

7.9

Beach & pool

5th-best month of the year

September is a reasonable time to visit Cocos for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Cocos in September

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

In September, Cocos sees daytime highs around 33°C and nights near 20°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Cocos 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 Cocos peaks around February 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 8 (very high).

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	16	15	12	10	8	8	10	12	13	14	13
Level	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Very high	Very high	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	16	Extreme
Mar	15	Extreme
Apr	12	Extreme
May	10	Very high
Jun	8	Very high
Jul	8	Very high
Aug	10	Very high
Sep	12	Extreme
Oct	13	Extreme
Nov	14	Extreme
Dec	13	Extreme

Location & terrain

Where is Cocos?

Cocos sits at 14.2°S, 44.5°W, 553 m above sea level, in Brazil. The nearest listed city is Malhada, 84 km away.

Topography around Cocos

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

Within 3 km, the terrain around Cocos has only modest variations in elevation — a maximum elevation change of 110 m around an average of 581 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 255 m; within 80 km, significant variations in elevation — a maximum elevation change of 392 m.

The land around Cocos is covered by shrubs (39%) and grassland (28%) within 3 km, shrubs (60%) and grassland (20%) within 16 km, and shrubs (66%) within 80 km.

3 km

110 m

shrubs 39%

16 km

255 m

shrubs 60%

80 km

392 m

shrubs 66%

treesshrubsgrasslandcroplandartificial surfaces

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

September weather nearby: Malhada 84 km · Carinhanha 84 km · Manga 91 km · Correntina 94 km · São Félix do Coribe 95 km · Santa Maria da Vitória 96 km · Itacarambi 113 km · Serra do Ramalho 125 km

Brazil travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / N; 127 / 220 V · 60 Hz
Prices: ≈ 46% of US; price level, 2025
GDP per capita: $10,713; 2025
Happiness: 6.6 / 10; World Happiness, 2025
Safe drinking water: 89%; of population, 2024
Homicide rate: 19.3; per 100k, 2023
Road deaths: 16; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Low; EF EPI 482
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 Cocos (-14.1839°, -44.5344°, elevation 553 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. 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	32	19
2	32	19
3	32	19
4	32	19
5	32	19
6	32	19
7	32	19
8	32	19
9	32	20
10	32	20
11	33	20
12	33	20
13	33	20
14	33	20
15	33	20
16	33	20
17	33	20
18	33	20
19	33	20
20	33	21
21	33	21
22	33	21
23	33	21
24	33	21
25	33	21
26	34	21
27	34	21
28	34	21
29	34	21
30	34	21

	Clearer (%)	Cloudier (%)
1	84	16
2	84	16
3	84	16
4	84	16
5	84	16
6	83	17
7	83	17
8	83	17
9	83	17
10	82	18
11	82	18
12	82	18
13	82	18
14	81	19
15	81	19
16	81	19
17	80	20
18	80	20
19	79	21
20	78	22
21	77	23
22	76	24
23	76	24
24	74	26
25	73	27
26	73	27
27	72	28
28	71	29
29	70	30
30	70	30

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	63	32	5	0
2	62	32	6	0
3	62	32	6	0
4	62	32	6	0
5	61	33	6	0
6	61	33	6	0
7	61	33	6	0
8	60	34	6	0
9	60	34	6	0
10	59	34	7	0
11	58	35	7	0
12	57	35	7	1
13	55	36	8	1
14	55	36	8	1
15	52	37	9	2
16	51	38	9	2
17	49	38	10	3
18	47	38	11	4
19	45	39	12	4
20	43	39	13	5
21	41	40	14	5
22	39	40	15	6
23	37	40	16	7
24	36	41	17	7
25	34	41	17	8
26	32	42	18	8
27	31	42	19	9
28	29	42	20	9
29	28	42	20	10
30	27	42	21	10

	Avg high (°C)	Avg low (°C)
1	32	19
2	32	19
3	32	19
4	32	19
5	32	19
6	32	19
7	32	19
8	32	19
9	32	20
10	32	20
11	33	20
12	33	20
13	33	20
14	33	20
15	33	20
16	33	20
17	33	20
18	33	20
19	33	20
20	33	21
21	33	21
22	33	21
23	33	21
24	33	21
25	33	21
26	34	21
27	34	21
28	34	21
29	34	21
30	34	21

	Clearer (%)	Cloudier (%)
1	84	16
2	84	16
3	84	16
4	84	16
5	84	16
6	83	17
7	83	17
8	83	17
9	83	17
10	82	18
11	82	18
12	82	18
13	82	18
14	81	19
15	81	19
16	81	19
17	80	20
18	80	20
19	79	21
20	78	22
21	77	23
22	76	24
23	76	24
24	74	26
25	73	27
26	73	27
27	72	28
28	71	29
29	70	30
30	70	30

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	63	32	5	0
2	62	32	6	0
3	62	32	6	0
4	62	32	6	0
5	61	33	6	0
6	61	33	6	0
7	61	33	6	0
8	60	34	6	0
9	60	34	6	0
10	59	34	7	0
11	58	35	7	0
12	57	35	7	1
13	55	36	8	1
14	55	36	8	1
15	52	37	9	2
16	51	38	9	2
17	49	38	10	3
18	47	38	11	4
19	45	39	12	4
20	43	39	13	5
21	41	40	14	5
22	39	40	15	6
23	37	40	16	7
24	36	41	17	7
25	34	41	17	8
26	32	42	18	8
27	31	42	19	9
28	29	42	20	9
29	28	42	20	10
30	27	42	21	10

	Avg high (°C)	Avg low (°C)
1	32	19
2	32	19
3	32	19
4	32	19
5	32	19
6	32	19
7	32	19
8	32	19
9	32	20
10	32	20
11	33	20
12	33	20
13	33	20
14	33	20
15	33	20
16	33	20
17	33	20
18	33	20
19	33	20
20	33	21
21	33	21
22	33	21
23	33	21
24	33	21
25	33	21
26	34	21
27	34	21
28	34	21
29	34	21
30	34	21

	Clearer (%)	Cloudier (%)
1	84	16
2	84	16
3	84	16
4	84	16
5	84	16
6	83	17
7	83	17
8	83	17
9	83	17
10	82	18
11	82	18
12	82	18
13	82	18
14	81	19
15	81	19
16	81	19
17	80	20
18	80	20
19	79	21
20	78	22
21	77	23
22	76	24
23	76	24
24	74	26
25	73	27
26	73	27
27	72	28
28	71	29
29	70	30
30	70	30

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	63	32	5	0
2	62	32	6	0
3	62	32	6	0
4	62	32	6	0
5	61	33	6	0
6	61	33	6	0
7	61	33	6	0
8	60	34	6	0
9	60	34	6	0
10	59	34	7	0
11	58	35	7	0
12	57	35	7	1
13	55	36	8	1
14	55	36	8	1
15	52	37	9	2
16	51	38	9	2
17	49	38	10	3
18	47	38	11	4
19	45	39	12	4
20	43	39	13	5
21	41	40	14	5
22	39	40	15	6
23	37	40	16	7
24	36	41	17	7
25	34	41	17	8
26	32	42	18	8
27	31	42	19	9
28	29	42	20	9
29	28	42	20	10
30	27	42	21	10