Boa Viagem weather in December

In December, Boa Viagem sees average daytime highs of 33°C and overnight lows near 23°C, with 20 mm of rain across 4.6 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 39% of the time in December, and the air most often feels muggy.

Daylight stretches from about 12 h 18 min at the start of December to 12 h 18 min by month's end. Set against the rest of the year, December is Boa Viagem's 7th-clearest and 4th-windiest month. For the whole year in context, see Boa Viagem's year-round climate.

Daytime high
33°
3rd warmest
Overnight low
23°
12th coldest
Rainfall
20 mm
4.6 wet days
Daylight
12 h 18 min
5:26 AM – 5:44 PM
Cloud cover
52%
7th clearest
Wind
15 km/h
4th windiest
Solar energy
6.25 kWh/m²
Travel score
3.7
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical December day in Boa Viagem reaches about 33°C in the afternoon and slips back to 23°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 35°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)
13423
23423
33423
43423
53423
63423
73423
83423
93423
103423
113423
123423
133423
143323
153323
163323
173323
183323
193323
203323
213323
223323
233323
243323
253323
263323
273323
283323
293323
303323
313323

How December really feels in Boa Viagem

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.

Boa Viagem weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°8913.812.33.5
Feb32° / 22°8215.612.23.5
Mar31° / 22°12019.5123.5
Apr30° / 22°1092011.93.7
May30° / 22°6913.211.84.6
Jun30° / 21°318.211.75.3
Jul31° / 21°184.411.75.5
Aug32° / 21°8211.85.1
Sep33° / 22°30.9124.5
Oct34° / 22°90.812.14.0
Nov34° / 23°51.212.23.8
Dec33° / 23°204.612.33.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 21% of December, with mostly cloudy or overcast conditions the remaining 40%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16436
26436
36535
46535
56436
66535
76436
86436
96436
106337
116337
126337
136337
146337
156238
166139
176139
186040
196040
205941
215941
225842
235743
245644
255644
265545
275545
285446
295248
305149
315050

Chance of precipitation in December

Any precipitation

Boa Viagem gets around 20 mm of rain over 4.6 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 16% and peaks near 29% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
15
25
35
46
56
67
78
88
99
1010
1111
1212
1313
1414
1515
1616
1717
1817
1918
2019
2120
2220
2321
2422
2523
2624
2725
2826
2927
3028
3129

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 59% of days. Sticky, muggy-or-worse air turns up on roughly 64% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1150481
2150481
3149492
4148492
5147502
6046522
7045532
8044533
9042553
10041563
11039583
12038593
13037594
14035614
15034624
16033625
17032635
18031645
19031645
20030646
21030646
22029656
23129637
24129637
25129637
26128638
27128638
28128638
29127639
30126649
311266310

Wind in December

Winds average 15 km/h in December.

Across December, daily wind ranges from about 14 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
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 18 min at the start of December to 12 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 5:20 AM to 5:33 AM, and sunset from 5:37 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:205:37
212.35:215:37
312.35:215:38
412.35:215:38
512.35:225:39
612.35:225:39
712.35:225:40
812.35:235:40
912.35:235:41
1012.35:245:41
1112.35:245:42
1212.35:245:42
1312.35:255:43
1412.35:255:43
1512.35:265:43
1612.35:265:44
1712.35:275:44
1812.35:275:45
1912.35:285:45
2012.35:285:46
2112.35:295:46
2212.35:295:47
2312.35:295:47
2412.35:305:48
2512.35:305:48
2612.35:315:49
2712.35:315:49
2812.35:325:50
2912.35:325:50
3012.35:335:50
3112.35:335:51

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.25 kWh/m².

For context, solar energy here swings from a low near 4.8 kWh/m² to a high of 6.99 kWh/m² in October across the year — December's 6.25 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.4Intense
76.4Intense
86.4Intense
96.4Intense
106.3Intense
116.3Intense
126.3Intense
136.3Intense
146.2Intense
156.2Intense
166.2Intense
176.2Intense
186.2Intense
196.2Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.1Intense
266.1Intense
276.1Intense
286.0Intense
296.0Intense
306.0Intense
316.0Bright
Planning a trip in December

Hazard calendar for Boa Viagem

In seasonPeak

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

Boa Viagem's rainy season runs January–May, 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 Boa Viagem?

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

3.7
Sightseeing
8th-best month of the year
6.9
Beach & pool
7th-best month of the year

December is a weaker month for outdoor sightseeing in Boa Viagem. The water and warmth also suit a beach or pool day.

What to pack for Boa Viagem in December

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

In December, Boa Viagem sees daytime highs around 33°C and nights near 23°C. Pack light clothes and sun protection. About 5 days see rain.

light clothessun protection

UV index in Boa Viagem 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 Boa Viagem peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 14UV 15Jun 22UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar16Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is Boa Viagem?

Boa Viagem sits at 5.1°S, 39.7°W, 288 m above sea level, in Brazil. The nearest listed city is Madalena, 35 km away.

Topography around Boa Viagem

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

Within 3 km, the terrain around Boa Viagem has only modest variations in elevation — a maximum elevation change of 64 m around an average of 292 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 437 m; within 80 km, large variations in elevation — a maximum elevation change of 982 m.

The land around Boa Viagem is covered by grassland (50%) and shrubs (37%) within 3 km, shrubs (74%) and grassland (24%) within 16 km, and shrubs (75%) and grassland (21%) within 80 km.

3 km
64 m
16 km
437 m
80 km
982 m
treesshrubsgrasslandcroplandartificial surfaces
December weather nearby: Madalena 35 km · Pedra Branca 36 km · Quixeramobim 49 km · Monsenhor Tabosa 53 km · Senador Pompeu 65 km · Itatira 68 km · Mombaça 69 km · Independência 70 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 Boa Viagem (-5.1275°, -39.7322°, elevation 288 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).