Caicó weather in December

In December, Caicó sees average daytime highs of 36°C and overnight lows near 24°C, with 11 mm of rain across 1.9 wet days and about 12.4 hours of daylight. It is the 2nd-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 36°C through the month. The sky is clear or mostly clear about 42% of the time in December, and the air most often feels humid.

Daylight stretches from about 12 h 18 min at the start of December to 12 h 24 min by month's end. Set against the rest of the year, December is Caicó's 6th-clearest and 7th-windiest month. For the whole year in context, see Caicó's year-round climate.

Daytime high
36°
2nd warmest
Overnight low
24°
9th coldest
Rainfall
11 mm
1.9 wet days
Daylight
12 h 24 min
5:13 AM – 5:36 PM
Cloud cover
50%
6th clearest
Wind
16 km/h
7th windiest
Solar energy
6.63 kWh/m²
Travel score
2.5
out of 10

Caicó is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 36°C through the month.

A typical December day in Caicó reaches about 36°C in the afternoon and slips back to 24°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 34°C and 37°C. Set against its neighbours, December runs on par with November and about 1°C warmer than January.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13624
23624
33624
43624
53624
63624
73624
83624
93624
103624
113624
123624
133624
143624
153624
163624
173624
183624
193624
203624
213624
223624
233624
243624
253624
263624
273624
283624
293624
303624
313624

How December really feels in Caicó

Once humidity and wind are folded in, December 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 December is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Caicó weather by month

How December compares with the rest of the year at a glance. December is the 2nd-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan35° / 24°59712.32.6
Feb35° / 24°568.412.22.6
Mar34° / 24°10111.8122.7
Apr34° / 24°6710.311.93.1
May33° / 23°305.511.73.6
Jun32° / 22°193.411.64.4
Jul32° / 21°12211.74.6
Aug33° / 21°50.411.84.3
Sep35° / 22°10.1123.4
Oct36° / 23°40.312.12.7
Nov36° / 23°10.212.32.5
Dec36° / 24°111.912.42.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 23% of December, with mostly cloudy or overcast conditions the remaining 36%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17030
27030
37030
47030
57030
67030
77030
86931
96832
106832
116733
126634
136634
146535
156436
166337
176337
186238
196238
206040
216040
226040
236040
246040
256040
265941
276040
286040
296040
306040
315941

Chance of precipitation in December

Any precipitation

Caicó gets around 11 mm of rain over 1.9 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 6% and peaks near 13% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
12
22
32
42
53
63
73
83
94
104
114
125
135
145
155
166
176
186
197
207
218
228
239
249
2510
2610
2711
2811
2912
3012
3113

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the humid band about 50% of days. Sticky, muggy-or-worse air turns up on roughly 48% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1260371
2260371
3259381
4259381
5258391
6258391
7257401
8156412
9155422
10154432
11153442
12152452
13151462
14150473
15049483
16148483
17148493
18147493
19147494
20147494
21146494
22146494
23146494
24146495
25146485
26145485
27145485
28145486
29144496
30144496
31143497

Wind in December

Winds average 16 km/h in December.

Across December, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 18 min at the start of December to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 5:08 AM to 5:20 AM, and sunset from 5:29 PM to 5:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:085:29
212.45:085:29
312.45:085:30
412.45:095:30
512.45:095:30
612.45:095:31
712.45:105:31
812.45:105:32
912.45:105:32
1012.45:115:33
1112.45:115:33
1212.45:125:34
1312.45:125:34
1412.45:125:35
1512.45:135:35
1612.45:135:36
1712.45:145:36
1812.45:145:37
1912.45:155:37
2012.45:155:38
2112.45:165:38
2212.45:165:39
2312.45:175:39
2412.45:175:40
2512.45:185:40
2612.45:185:40
2712.45:195:41
2812.45:195:41
2912.45:195:42
3012.45:205:42
3112.45:205:43

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.63 kWh/m².

For context, solar energy here swings from a low near 4.72 kWh/m² to a high of 7.09 kWh/m² in October across the year — December's 6.63 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.8Intense
46.8Intense
56.8Intense
66.8Intense
76.8Intense
86.7Intense
96.7Intense
106.7Intense
116.7Intense
126.7Intense
136.6Intense
146.6Intense
156.6Intense
166.6Intense
176.6Intense
186.6Intense
196.6Intense
206.6Intense
216.5Intense
226.5Intense
236.5Intense
246.5Intense
256.5Intense
266.5Intense
276.5Intense
286.5Intense
296.5Intense
306.5Intense
316.5Intense
Planning a trip in December

Is December a good time to visit Caicó?

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

2.5
Sightseeing
11th-best month of the year
5.8
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Caicó.

What to pack for Caicó in December

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

In December, Caicó sees daytime highs around 36°C and nights near 24°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Caicó in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December 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 Caicó peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 17 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 highExtremeMar 13UV 15Jul 17UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec12Extreme

Air quality in Caicó in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Caicó is worst in October — around 21 µg/m³ PM2.5 (moderate), about 4.0× the cleanest month (July, 5 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateOct 1421 µg/m³Jul 95 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb9Good
Mar8Good
Apr8Good
May7Good
Jun6Good
Jul5Good
Aug13Moderate
Sep20Moderate
Oct21Moderate
Nov19Moderate
Dec16Moderate
Location & terrain

Where is Caicó?

Caicó sits at 6.5°S, 37.1°W, 161 m above sea level, in Brazil. The nearest listed city is Jucurutu, 48 km away.

Topography around Caicó

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

Within 3 km, the terrain around Caicó has only modest variations in elevation — a maximum elevation change of 54 m around an average of 162 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 499 m; within 80 km, large variations in elevation — a maximum elevation change of 867 m.

The land around Caicó is covered by shrubs (36%), grassland (31%) and artificial surfaces (27%) within 3 km, shrubs (69%) and grassland (26%) within 16 km, and shrubs (77%) within 80 km.

3 km
54 m
16 km
499 m
80 km
867 m
treesshrubsgrasslandcroplandartificial surfaceswater
December weather nearby: Jucurutu 48 km · Parelhas 55 km · Patos 66 km · Currais Novos 68 km · Catolé do Rocha 73 km · São Bento 75 km · Lagoa Nova 80 km · Picuí 83 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 Caicó (-6.4583°, -37.0978°, elevation 161 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. 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).