Barro weather in December

In December, Barro sees average daytime highs of 35°C and overnight lows near 24°C, with 35 mm of rain across 5.4 wet days and about 12.4 hours of daylight. It is the 3rd-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 33% of the time in December, and the air most often feels humid.

Daylight stretches from about 12 h 24 min at the start of December to 12 h 24 min by month's end. Set against the rest of the year, December is Barro's 7th-clearest and 8th-windiest month. For the whole year in context, see Barro's year-round climate.

Daytime high
35°
3rd warmest
Overnight low
24°
12th coldest
Rainfall
35 mm
5.4 wet days
Daylight
12 h 24 min
5:19 AM – 5:44 PM
Cloud cover
56%
7th clearest
Wind
10 km/h
8th windiest
Solar energy
6.52 kWh/m²
Travel score
3.0
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 35°C through the month.

A typical December day in Barro reaches about 35°C in the afternoon and slips back to 24°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 37°C. Set against its neighbours, December runs on par with November and about 2°C warmer than January.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13524
23524
33524
43524
53524
63524
73524
83524
93524
103524
113524
123524
133524
143524
153524
163524
173424
183424
193424
203424
213424
223424
233424
243424
253424
263424
273424
283424
293424
303424
313424

How December really feels in Barro

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.

Barro weather by month

How December compares with the rest of the year at a glance. December is the 3rd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 23°11813.712.43.2
Feb32° / 23°15614.512.23.4
Mar31° / 23°19018.9123.4
Apr31° / 22°11514.411.83.9
May31° / 22°498.211.74.8
Jun30° / 21°183.711.65.5
Jul31° / 20°7211.65.6
Aug32° / 20°40.611.85.0
Sep34° / 21°20.4123.8
Oct35° / 23°71.212.23.0
Nov35° / 24°102.212.32.9
Dec35° / 24°355.412.43.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 24% of December, with mostly cloudy or overcast conditions the remaining 44%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15842
25941
35941
46040
56040
66040
76040
85941
95941
105842
115842
125842
135743
145743
155644
165743
175743
185644
195644
205644
215545
225446
235446
245446
255347
265347
275347
285347
295347
305149
315149

Chance of precipitation in December

Any precipitation

Barro gets around 35 mm of rain over 5.4 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 18% 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 (%)
18
28
38
48
59
69
710
811
912
1013
1114
1215
1316
1417
1518
1619
1719
1820
1921
2022
2123
2223
2324
2424
2525
2625
2726
2827
2927
3028
3129

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 47% of days. Sticky, muggy-or-worse air turns up on roughly 31% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
112755152
212755152
312755152
412753163
512753163
612752173
712752173
812652183
912651193
1002551204
1102550223
1202449233
1302348253
1402348263
1502247273
1602147293
1702146303
1802046312
1902045322
2001945332
2111944342
2211844353
2311843353
2411743364
2511742364
2611642375
2711641376
2811540376
2911540377
3011439388
3111339389

Wind in December

Winds average 10 km/h in December.

Across December, daily wind ranges from about 9 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 24 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 0 minutes over December. Sunrise moves from 5:13 AM to 5:26 AM, and sunset from 5:36 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:135:36
212.45:145:37
312.45:145:37
412.45:145:38
512.45:155:38
612.45:155:39
712.45:155:39
812.45:165:40
912.45:165:40
1012.45:165:41
1112.45:175:41
1212.45:175:42
1312.45:185:42
1412.45:185:43
1512.45:185:43
1612.45:195:44
1712.45:195:44
1812.45:205:45
1912.45:205:45
2012.45:215:46
2112.45:215:46
2212.45:225:47
2312.45:225:47
2412.45:235:48
2512.45:235:48
2612.45:235:48
2712.45:245:49
2812.45:245:49
2912.45:255:50
3012.45:255:50
3112.45:265:51

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.52 kWh/m².

For context, solar energy here swings from a low near 4.61 kWh/m² to a high of 7.03 kWh/m² in October across the year — December's 6.52 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.7Intense
46.7Intense
56.7Intense
66.7Intense
76.7Intense
86.7Intense
96.6Intense
106.6Intense
116.6Intense
126.6Intense
136.5Intense
146.5Intense
156.5Intense
166.5Intense
176.5Intense
186.5Intense
196.4Intense
206.4Intense
216.4Intense
226.4Intense
236.4Intense
246.4Intense
256.4Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
316.3Intense
Planning a trip in December

Hazard calendar for Barro

In seasonPeak

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

Barro's monsoon runs January–April, when most of the year's rain falls.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Barro?

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

3.0
Sightseeing
10th-best month of the year
6.2
Beach & pool
8th-best month of the year

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

What to pack for Barro in December

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

In December, Barro sees daytime highs around 35°C and nights near 24°C. Pack light clothes and sun protection. About 5 days see rain.

light clothessun protection

UV index in Barro 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 Barro peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 14 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 14UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct13Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is Barro?

Barro sits at 7.2°S, 38.8°W, 579 m above sea level, in Brazil. The nearest listed city is Mauriti, 23 km away.

Topography around Barro

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

Within 3 km, the terrain around Barro has only modest variations in elevation — a maximum elevation change of 105 m around an average of 378 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 496 m; within 80 km, large variations in elevation — a maximum elevation change of 847 m.

The land around Barro is covered by shrubs (50%) and grassland (35%) within 3 km, shrubs (58%) and grassland (23%) within 16 km, and shrubs (55%) and grassland (26%) within 80 km.

3 km
105 m
16 km
496 m
80 km
847 m
treesshrubsgrasslandcroplandartificial surfaceswater
December weather nearby: Mauriti 23 km · Milagres 24 km · São José de Piranhas 31 km · Aurora 33 km · Cajazeiras 41 km · Missão Velha 41 km · Brejo Santo 42 km · Lavras da Mangabeira 51 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 Barro (-7.1785°, -38.78°, elevation 579 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).