Cocos weather in December

In December, Cocos sees average daytime highs of 30°C and overnight lows near 21°C, with 152 mm of rain across 15.5 wet days and about 12.8 hours of daylight. It is the 9th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 21% of the time in December, and the air most often feels muggy.

Daylight stretches from about 12 h 48 min at the start of December to 12 h 48 min by month's end. Set against the rest of the year, December is Cocos's 11th-clearest and 10th-windiest month. For the whole year in context, see Cocos's year-round climate.

Daytime high
30°
9th warmest
Overnight low
21°
10th coldest
Rainfall
152 mm
15.5 wet days
Daylight
12 h 48 min
5:29 AM – 6:19 PM
Cloud cover
70%
11th clearest
Wind
7 km/h
10th windiest
Solar energy
5.99 kWh/m²
Travel score
4.1
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical December day in Cocos reaches about 30°C in the afternoon and slips back to 21°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 34°C. Set against its neighbours, December runs on par with November and on par with January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13021
23021
33021
43021
53021
63021
73021
83021
93021
103021
113021
123021
133021
143021
153021
163021
173121
183121
193121
203121
213121
223121
233121
243121
253121
263121
273121
283121
293121
303121
313121

How December really feels in Cocos

Once humidity and wind are folded in, December averages 13 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
13
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Cocos weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 21°13013.112.74.3
Feb31° / 21°9811.412.54.3
Mar31° / 21°12712.712.14.4
Apr31° / 21°536.811.75.1
May30° / 20°81.711.45.9
Jun29° / 18°20.311.26.8
Jul29° / 18°00.111.27.0
Aug31° / 18°10.211.56.1
Sep33° / 20°71.211.94.6
Oct33° / 22°616.612.33.7
Nov31° / 22°16515.212.73.8
Dec30° / 21°15215.512.84.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 67%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12476
22377
32476
42575
52575
62674
72575
82674
92773
102872
112872
123070
133070
143070
153367
163367
173565
183664
193763
203763
213961
223961
233961
244159
254060
264159
274060
284060
294060
303961
313961

Chance of precipitation in December

Any precipitation

Cocos gets around 152 mm of rain over 15.5 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 50% and peaks near 57% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
157
257
357
457
557
657
757
857
957
1057
1156
1255
1354
1453
1552
1650
1749
1848
1947
2046
2145
2244
2344
2443
2543
2643
2743
2843
2944
3044
3144

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the muggy band about 52% of days. Sticky, muggy-or-worse air turns up on roughly 73% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
104215322
204205323
314195224
414195224
514185225
615185125
715175126
815175126
915175027
1015175126
1105175226
1205185126
1306185125
1406195124
1506205123
1606215122
1706225121
1806235120
1906245119
2005255218
2105255317
2205265316
2304275316
2404275316
2504275316
2604275316
2703275416
2803275317
2903275317
3003265318
3103255418

Wind in December

Winds average 7 km/h in December.

Across December, daily wind ranges from about 7 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
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 48 min at the start of December to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 5:25 AM to 5:36 AM, and sunset from 6:11 PM to 6:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:256:11
212.85:256:12
312.85:256:12
412.85:256:13
512.85:256:13
612.85:266:14
712.85:266:15
812.85:266:15
912.85:276:16
1012.85:276:16
1112.85:276:17
1212.85:286:17
1312.85:286:18
1412.85:286:18
1512.85:296:19
1612.85:296:19
1712.85:306:20
1812.85:306:20
1912.85:316:21
2012.85:316:21
2112.85:316:22
2212.85:326:22
2312.85:326:23
2412.85:336:23
2512.85:336:24
2612.85:346:24
2712.85:346:25
2812.85:356:25
2912.85:356:25
3012.85:366:26
3112.85:366:26

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.99 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 — December's 5.99 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.9Bright
135.9Bright
145.9Bright
156.0Bright
166.0Intense
176.0Intense
186.1Intense
196.1Intense
206.1Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
316.2Intense
Planning a trip in December

Hazard calendar for Cocos

In seasonPeak

In December, Cocos sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

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 December a good time to visit Cocos?

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

4.1
Sightseeing
10th-best month of the year
5.8
Beach & pool
11th-best month of the year

December is a reasonable time to visit Cocos for sightseeing.

What to pack for Cocos in December

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

In December, Cocos sees daytime highs around 30°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 16 days see rain.

light clothesrain gearsun protection

UV index in Cocos in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December 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 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 17UV 15Jul 10UV 8
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar15Extreme
Apr12Extreme
May10Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov14Extreme
Dec13Extreme
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
16 km
255 m
80 km
392 m
treesshrubsgrasslandcroplandartificial surfaces
December 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
Roman Catholic 57%Evangelical 27%none 9%other 4%

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).