Plácido de Castro weather in December

In December, Plácido de Castro sees average daytime highs of 31°C and overnight lows near 23°C, with 261 mm of rain across 26.5 wet days and about 12.6 hours of daylight. It is the 6th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°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 36 min at the start of December to 12 h 36 min by month's end. Set against the rest of the year, December is Plácido de Castro's 9th-clearest and 4th-windiest month. For the whole year in context, see Plácido de Castro's year-round climate.

Daytime high
31°
6th warmest
Overnight low
23°
12th coldest
Rainfall
261 mm
26.5 wet days
Daylight
12 h 36 min
5:07 AM – 5:43 PM
Cloud cover
86%
9th clearest
Wind
6 km/h
4th windiest
Solar energy
4.87 kWh/m²
Travel score
2.8
out of 10

Plácido de Castro 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 31°C through the month.

A typical December day in Plácido de Castro reaches about 31°C in the afternoon and slips back to 23°C overnight — a 8°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
73123
83123
93123
103123
113123
123123
133123
143123
153123
163123
173123
183123
193123
203123
213123
223123
233123
243023
253023
263023
273023
283023
293023
303023
313023

How December really feels in Plácido de Castro

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.

Plácido de Castro weather by month

How December compares with the rest of the year at a glance. December is the 6th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°25926.712.52.8
Feb30° / 23°25024.512.32.8
Mar30° / 23°26326.912.12.8
Apr30° / 23°17322.711.83.2
May30° / 22°8816.511.54.3
Jun30° / 21°418.111.45.2
Jul31° / 20°244.711.55.1
Aug33° / 21°457.311.73.9
Sep33° / 22°8913.611.93.1
Oct32° / 23°1612112.22.8
Nov31° / 23°22323.712.52.8
Dec31° / 23°26126.512.62.8

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 92%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1991
2991
3892
4892
5892
6892
7892
8892
9892
10892
11892
12892
13892
14892
15892
16892
17892
18892
19892
20892
21892
22892
23892
24892
25892
26892
27892
28793
29793
30793
31694

Chance of precipitation in December

Any precipitation

Plácido de Castro gets around 261 mm of rain over 26.5 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 85% and peaks near 86% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
185
285
385
485
585
686
786
886
986
1086
1186
1286
1386
1486
1586
1686
1786
1886
1986
2086
2186
2285
2385
2485
2585
2685
2784
2884
2984
3084
3184

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 81% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
107426
207525
307525
407624
507624
607723
707723
807822
907921
1007921
1108020
1208020
1308119
1408119
1508119
1618118
1718118
1818118
1918217
2018217
2118316
2218316
2318415
2418415
2518514
2618514
2718514
2818514
2918514
3008614
3108614

Wind in December

Winds average 6 km/h in December.

Across December, daily wind ranges from about 6 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
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 36 min at the start of December to 12 h 36 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 5:02 AM to 5:14 AM, and sunset from 5:35 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:025:35
212.65:025:36
312.65:025:36
412.65:025:37
512.65:035:37
612.65:035:38
712.65:035:38
812.65:045:39
912.65:045:39
1012.65:045:40
1112.65:055:40
1212.65:055:41
1312.65:065:41
1412.65:065:42
1512.65:065:42
1612.65:075:43
1712.65:075:43
1812.65:085:44
1912.65:085:44
2012.65:095:45
2112.65:095:45
2212.65:105:46
2312.65:105:46
2412.65:115:47
2512.65:115:47
2612.65:125:48
2712.65:125:48
2812.65:125:49
2912.65:135:49
3012.65:135:49
3112.65:145:50

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.87 kWh/m².

For context, solar energy here swings from a low near 4.24 kWh/m² to a high of 5.56 kWh/m² in September across the year — December's 4.87 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in December

Hazard calendar for Plácido de Castro

In seasonPeak

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

Plácido de Castro'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 Plácido de Castro?

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

2.8
Sightseeing
7th-best month of the year
4.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Plácido de Castro.

What to pack for Plácido de Castro in December

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

In December, Plácido de Castro sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

UV index in Plácido de Castro 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 Plácido de Castro peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 12 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateExtremeJan 21UV 15Sep 12UV 4
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May10Extreme
Jun9Very high
Jul8Very high
Aug7High
Sep4Moderate
Oct12Extreme
Nov13Extreme
Dec14Extreme

Air quality in Plácido de Castro 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 Plácido de Castro is worst in September — around 60 µg/m³ PM2.5 (unhealthy), about 7.8× the cleanest month (June, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModeratePoorModerateGoodSep 1457 µg/m³Jun 98 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb13Moderate
Mar13Moderate
Apr10Good
May8Good
Jun8Good
Jul12Good
Aug37Poor
Sep60Unhealthy
Oct23Moderate
Nov13Moderate
Dec11Good
Location & terrain

Where is Plácido de Castro?

Plácido de Castro sits at 10.3°S, 67.2°W, 136 m above sea level, in Brazil. The nearest listed city is Senador Guiomard, 64 km away.

Topography around Plácido de Castro

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

Within 3 km, the terrain around Plácido de Castro has only modest variations in elevation — a maximum elevation change of 51 m around an average of 135 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 112 m; within 80 km, only modest variations in elevation — a maximum elevation change of 133 m.

The land around Plácido de Castro is covered by trees (71%) and grassland (24%) within 3 km, trees (74%) and grassland (26%) within 16 km, and trees (74%) and grassland (26%) within 80 km.

3 km
51 m
16 km
112 m
80 km
133 m
treesgrasslandartificial surfaces
December weather nearby: Senador Guiomard 64 km · Rio Branco 79 km · Porto Acre 91 km · Riberalta 145 km · Xapuri 148 km · Boca do Acre 178 km · Epitaciolândia 187 km · Brasiléia 187 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 Plácido de Castro (-10.3353°, -67.1856°, elevation 136 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).