Conceição de Macabu weather in December

In December, Conceição de Macabu sees average daytime highs of 30°C and overnight lows near 22°C, with 243 mm of rain across 21.1 wet days and about 13.3 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 29°C in the first days to 30°C by the end. The sky is clear or mostly clear about 13% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 13 h 18 min at the start of December to 13 h 18 min by month's end. Set against the rest of the year, December is Conceição de Macabu's 11th-clearest and 7th-windiest month. For the whole year in context, see Conceição de Macabu's year-round climate.

Daytime high
30°
4th warmest
Overnight low
22°
9th coldest
Rainfall
243 mm
21.1 wet days
Daylight
13 h 18 min
6:03 AM – 7:24 PM
Cloud cover
75%
11th clearest
Wind
7 km/h
7th windiest
Solar energy
5.61 kWh/m²
Travel score
3.8
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 29°C in the first days to 30°C by the end.

A typical December day in Conceição de Macabu reaches about 30°C in the afternoon and slips back to 22°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 33°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12921
22921
32921
42921
52921
62921
72921
82921
92921
102921
112921
122921
132921
143022
153022
163022
173022
183022
193022
203022
213022
223022
233022
243022
253022
263022
273022
283022
293022
303022
313022

How December really feels in Conceição de Macabu

Once humidity and wind are folded in, December averages 19 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
19
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.

Conceição de Macabu weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 22°20218.113.23.6
Feb31° / 22°11913.912.83.7
Mar30° / 22°18118.712.23.9
Apr29° / 20°9413.811.55.3
May26° / 18°609.7116.7
Jun26° / 17°28610.77.5
Jul26° / 16°285.610.87.7
Aug26° / 17°285.911.27.4
Sep27° / 18°669.811.96.5
Oct28° / 19°10513.212.55.7
Nov28° / 20°22118.513.14.6
Dec30° / 22°24321.113.33.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% 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 75%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12179
22080
32080
41882
51882
61882
71882
81981
91981
102179
112179
122179
132278
142476
152575
162575
172773
182872
192872
203070
213070
223169
233268
243268
253169
263169
273169
283169
293070
303070
313070

Chance of precipitation in December

Any precipitation

Conceição de Macabu gets around 243 mm of rain over 21.1 wet days in December, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 68% and peaks near 70% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
166
267
367
468
568
669
769
869
970
1069
1169
1269
1369
1469
1568
1668
1768
1867
1967
2067
2167
2267
2367
2467
2567
2667
2767
2867
2966
3066
3165

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the oppressive band about 64% of days. Sticky, muggy-or-worse air turns up on roughly 95% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
111141460
211041470
311040491
41939501
51938511
61838521
71837531
80736561
90735571
100635581
110634591
120533611
130432631
140431641
150330652
160329662
170328672
180227692
190226702
200225712
210224722
220224722
230223732
240222742
250222742
260222742
270222742
280222742
290222742
300123742
310123742

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 13 h 18 min at the start of December to 13 h 18 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 6:00 AM to 6:11 AM, and sunset from 7:15 PM to 7:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.36:007:15
213.36:007:15
313.36:007:16
413.36:007:17
513.36:007:17
613.36:007:18
713.36:017:19
813.36:017:19
913.36:017:20
1013.36:017:20
1113.36:027:21
1213.36:027:22
1313.36:027:22
1413.36:037:23
1513.36:037:23
1613.36:037:24
1713.36:047:24
1813.36:047:25
1913.36:057:26
2013.46:057:26
2113.46:057:26
2213.46:067:27
2313.46:067:27
2413.46:077:28
2513.36:077:28
2613.36:087:29
2713.36:087:29
2813.36:097:30
2913.36:107:30
3013.36:107:30
3113.36:117:31

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.61 kWh/m².

For context, solar energy here swings from a low near 3.45 kWh/m² to a high of 6.1 kWh/m² in February across the year — December's 5.61 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.4Bright
95.4Bright
105.4Bright
115.4Bright
125.5Bright
135.5Bright
145.5Bright
155.6Bright
165.6Bright
175.6Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.9Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in December

Hazard calendar for Conceição de Macabu

In seasonPeak

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

Conceição de Macabu'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 Conceição de Macabu?

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

3.8
Sightseeing
10th-best month of the year
5.0
Beach & pool
12th-best month of the year

December is a weaker month for outdoor sightseeing in Conceição de Macabu.

What to pack for Conceição de Macabu in December

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

In December, Conceição de Macabu sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

Sea temperature near Conceição de Macabu in December

The nearest coast averages about 24°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 41 km away) is warmest in March at about 25°C and coldest in September near 22°C.

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

20°22°24°26°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan24Refreshing
Feb24Warm
Mar25Warm
Apr25Warm
May24Refreshing
Jun23Refreshing
Jul22Refreshing
Aug22Refreshing
Sep22Refreshing
Oct22Refreshing
Nov23Refreshing
Dec24Refreshing

UV index in Conceição de Macabu in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Conceição de Macabu peaks around January 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 21UV 14Jun 23UV 6
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar13Extreme
Apr10Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep8Very high
Oct12Extreme
Nov14Extreme
Dec14Extreme
Location & terrain

Where is Conceição de Macabu?

Conceição de Macabu sits at 22.1°S, 41.9°W, 43 m above sea level, in Brazil. The nearest listed city is Macaé, 34 km away.

Topography around Conceição de Macabu

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

Within 3 km, the terrain around Conceição de Macabu has significant variations in elevation — a maximum elevation change of 557 m around an average of 98 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,236 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,215 m.

The land around Conceição de Macabu is covered by grassland (53%) and trees (42%) within 3 km, trees (52%) and grassland (48%) within 16 km, and grassland (47%), trees (29%) and water (20%) within 80 km.

3 km
557 m
16 km
1,236 m
80 km
2,215 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Macaé 34 km · Quissamã 41 km · Rio das Ostras 50 km · São Fidélis 50 km · Itaocara 51 km · Cordeiro 51 km · Cantagalo 53 km · Casimiro de Abreu 56 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 Conceição de Macabu (-22.0853°, -41.8683°, elevation 43 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).