Boca do Acre weather in December

In December, Boca do Acre sees average daytime highs of 30°C and overnight lows near 23°C, with 268 mm of rain across 27.8 wet days and about 12.5 hours of daylight. It is the 5th-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 2% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 30 min at the start of December to 12 h 30 min by month's end. Set against the rest of the year, December is Boca do Acre's 9th-clearest and 5th-windiest month. For the whole year in context, see Boca do Acre's year-round climate.

Daytime high
30°
5th warmest
Overnight low
23°
12th coldest
Rainfall
268 mm
27.8 wet days
Daylight
12 h 30 min
6:11 AM – 6:41 PM
Cloud cover
87%
9th clearest
Wind
5 km/h
5th windiest
Solar energy
4.71 kWh/m²
Travel score
2.7
out of 10

Boca do Acre 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 30°C through the month.

A typical December day in Boca do Acre reaches about 30°C in the afternoon and slips back to 23°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 33°C. Set against its neighbours, December runs on par with November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13123
23123
33123
43123
53123
63123
73023
83023
93023
103023
113023
123023
133023
143023
153023
163023
173023
183023
193023
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023
313023

How December really feels in Boca do Acre

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.

Boca do Acre weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°26827.912.52.8
Feb30° / 23°26525.612.32.8
Mar30° / 23°27428.512.12.7
Apr30° / 23°1982511.83.0
May30° / 22°11719.611.63.9
Jun30° / 22°4910.511.55.1
Jul30° / 21°336.311.55.6
Aug31° / 22°508.711.74.6
Sep32° / 23°9815.511.93.5
Oct32° / 23°16221.912.23.0
Nov31° / 23°21724.512.42.8
Dec30° / 23°26827.812.52.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 6% of December, with mostly cloudy or overcast conditions the remaining 93%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1892
2892
3892
4793
5793
6793
7793
8793
9892
10892
11892
12892
13892
14892
15892
16892
17793
18793
19793
20793
21793
22793
23793
24793
25793
26793
27694
28694
29694
30694
31694

Chance of precipitation in December

Any precipitation

Boca do Acre gets around 268 mm of rain over 27.8 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 89% and peaks near 91% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
188
289
389
490
590
690
790
891
991
1091
1191
1291
1390
1490
1590
1690
1790
1890
1990
2089
2189
2289
2389
2488
2588
2688
2788
2888
2988
3089
3189

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 59% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
14852
24951
34951
45050
55149
65248
75248
85347
95347
105446
115446
125545
135545
145644
155743
165743
175842
185941
196040
206139
216238
226436
236535
246634
256733
266832
276832
286931
296931
307030
317030

Wind in December

Winds average 5 km/h in December.

Across December, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 30 min at the start of December to 12 h 30 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 6:05 AM to 6:18 AM, and sunset from 6:34 PM to 6:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:056:34
212.56:056:34
312.56:066:35
412.56:066:35
512.56:066:35
612.56:076:36
712.56:076:36
812.56:076:37
912.56:086:37
1012.56:086:38
1112.56:086:38
1212.56:096:39
1312.56:096:39
1412.56:106:40
1512.56:106:40
1612.56:116:41
1712.56:116:41
1812.56:116:42
1912.56:126:42
2012.56:126:43
2112.56:136:43
2212.56:136:44
2312.56:146:44
2412.56:146:45
2512.56:156:45
2612.56:156:46
2712.56:166:46
2812.56:166:47
2912.56:176:47
3012.56:176:47
3112.56:186:48

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.71 kWh/m².

For context, solar energy here swings from a low near 4.18 kWh/m² to a high of 5.53 kWh/m² in September across the year — December's 4.71 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.7Bright
164.7Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in December

Hazard calendar for Boca do Acre

In seasonPeak

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

Boca do Acre's rainy season runs October–April, 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 Boca do Acre?

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

2.7
Sightseeing
11th-best month of the year
3.9
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Boca do Acre.

What to pack for Boca do Acre in December

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

In December, Boca do Acre sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 28 days see rain.

light clothesrain gearsun protection

UV index in Boca do Acre 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 Boca do Acre peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 9 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeJan 21UV 15Sep 9UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun9Very high
Jul9Very high
Aug5Moderate
Sep5Moderate
Oct12Extreme
Nov13Extreme
Dec13Extreme

Air quality in Boca do Acre 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 Boca do Acre is worst in September — around 110 µg/m³ PM2.5 (unhealthy), about 13.6× the cleanest month (June, 8 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateUnhealthyModerateSep 12106 µg/m³Jun 108 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar13Moderate
Apr11Good
May9Good
Jun8Good
Jul15Moderate
Aug87Unhealthy
Sep110Unhealthy
Oct28Moderate
Nov14Moderate
Dec12Good
Location & terrain

Where is Boca do Acre?

Boca do Acre sits at 8.8°S, 67.4°W, 107 m above sea level, in Brazil. The nearest listed city is Porto Acre, 94 km away.

Riberalta

Topography around Boca do Acre

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

Within 3 km, the terrain around Boca do Acre has only modest variations in elevation — a maximum elevation change of 76 m around an average of 118 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 92 m; within 80 km, only modest variations in elevation — a maximum elevation change of 140 m.

The land around Boca do Acre is covered by trees (71%) within 3 km, trees (79%) within 16 km, and trees (88%) within 80 km.

3 km
76 m
16 km
92 m
80 km
140 m
treesgrasslandartificial surfaceswater
December weather nearby: Porto Acre 94 km · Pauini 124 km · Rio Branco 143 km · Sena Madureira 144 km · Senador Guiomard 160 km · Plácido de Castro 178 km · Xapuri 244 km · Riberalta 291 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 Boca do Acre (-8.7522°, -67.3978°, elevation 107 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).