Placas weather in December

In December, Placas sees average daytime highs of 31°C and overnight lows near 23°C, with 159 mm of rain across 21.6 wet days and about 12.2 hours of daylight. It is the 6th-warmest and 6th-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 7% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of December to 12 h 12 min by month's end. Set against the rest of the year, December is Placas's 7th-clearest and 3rd-windiest month. For the whole year in context, see Placas's year-round climate.

Daytime high
31°
6th warmest
Overnight low
23°
9th coldest
Rainfall
159 mm
21.6 wet days
Daylight
12 h 12 min
6:26 AM – 6:40 PM
Cloud cover
80%
7th clearest
Wind
6 km/h
3rd windiest
Solar energy
4.79 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 31°C through the month.

A typical December day in Placas reaches about 31°C in the afternoon and slips back to 23°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 34°C. Set against its neighbours, December runs about 1°C cooler than November and about 1°C warmer than January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13223
23223
33223
43223
53223
63223
73223
83223
93223
103223
113223
123223
133223
143223
153123
163123
173123
183123
193123
203123
213123
223123
233123
243123
253123
263123
273123
283123
293123
303123
313123

How December really feels in Placas

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.

Placas weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°23526.512.22.9
Feb30° / 22°24725.412.12.9
Mar30° / 22°29128.7122.8
Apr30° / 22°25027.511.92.7
May30° / 22°17124.911.83.1
Jun31° / 22°591411.84.1
Jul32° / 22°379.511.84.1
Aug34° / 22°296.611.93.5
Sep34° / 23°458.9123.0
Oct34° / 23°7813.812.12.9
Nov33° / 23°1151812.22.9
Dec31° / 23°15921.612.23.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 82%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12575
22575
32575
42377
52377
62377
72377
82278
92278
102179
112080
121981
131981
141882
151882
161684
171585
181585
191585
201486
211486
221486
231486
241486
251486
261486
271486
281486
291387
301387
311387

Chance of precipitation in December

Any precipitation

Placas gets around 159 mm of rain over 21.6 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 70% and peaks near 81% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
158
258
359
459
559
660
761
861
963
1064
1165
1267
1368
1470
1571
1672
1773
1874
1975
2076
2177
2277
2378
2479
2579
2679
2780
2880
2980
3081
3181

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 98% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
13961
23961
33961
43961
53961
63961
73961
83961
92971
102971
112971
122971
132971
142971
152971
161981
171981
181981
191981
201981
211981
220991
230991
240991
250991
260991
270991
280991
290991
300991
310991

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 6 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
296calm
306calm
316calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 12 min at the start of December to 12 h 12 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 6:20 AM to 6:33 AM, and sunset from 6:33 PM to 6:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:206:33
212.26:216:33
312.26:216:34
412.26:216:34
512.26:226:35
612.26:226:35
712.26:236:36
812.26:236:36
912.26:236:36
1012.26:246:37
1112.26:246:37
1212.26:256:38
1312.26:256:38
1412.26:256:39
1512.26:266:39
1612.26:266:40
1712.26:276:40
1812.26:276:41
1912.26:286:41
2012.26:286:42
2112.26:296:42
2212.26:296:43
2312.26:306:43
2412.26:306:44
2512.26:316:44
2612.26:316:44
2712.26:326:45
2812.26:326:45
2912.26:326:46
3012.26:336:46
3112.26:336:47

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.79 kWh/m².

For context, solar energy here swings from a low near 4.01 kWh/m² to a high of 5.95 kWh/m² in September across the year — December's 4.79 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.1Bright
55.1Bright
65.1Bright
75.0Bright
85.0Bright
95.0Bright
104.9Bright
114.9Bright
124.9Bright
134.8Bright
144.8Bright
154.8Bright
164.7Bright
174.7Bright
184.7Bright
194.6Bright
204.6Bright
214.6Bright
224.6Bright
234.6Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.4Bright
314.4Bright
Planning a trip in December

Hazard calendar for Placas

In seasonPeak

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

Placas's rainy season runs December–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 Placas?

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

3.0
Sightseeing
5th-best month of the year
4.6
Beach & pool
7th-best month of the year

December is a weaker month for outdoor sightseeing in Placas.

What to pack for Placas in December

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

In December, Placas sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

UV index in Placas in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Placas peaks around February 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 17 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 highExtremeVery highExtremeFeb 21UV 15Nov 17UV 10
UV index (midday)Level
Jan13Extreme
Feb16Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Extreme
Sep11Extreme
Oct11Extreme
Nov9Very high
Dec11Extreme

Air quality in Placas 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 Placas is worst in October — around 59 µg/m³ PM2.5 (unhealthy), about 7.3× the cleanest month (June, 8 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModeratePoorUnhealthyModerateOct 2258 µg/m³Jun 208 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb13Moderate
Mar13Moderate
Apr12Good
May10Good
Jun8Good
Jul9Good
Aug15Moderate
Sep35Moderate
Oct59Unhealthy
Nov55Poor
Dec24Moderate
Location & terrain

Where is Placas?

Placas sits at 3.9°S, 54.2°W, 104 m above sea level, in Brazil. The nearest listed city is Uruará, 56 km away.

Topography around Placas

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

Within 3 km, the terrain around Placas has only modest variations in elevation — a maximum elevation change of 87 m around an average of 101 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 341 m; within 80 km, significant variations in elevation — a maximum elevation change of 444 m.

The land around Placas is covered by trees (48%) and grassland (48%) within 3 km, trees (71%) and grassland (29%) within 16 km, and trees (85%) within 80 km.

3 km
87 m
16 km
341 m
80 km
444 m
treesgrasslandartificial surfaces
December weather nearby: Uruará 56 km · Rurópolis 81 km · Aveiro 127 km · Mojuí dos Campos 140 km · Medicilândia 155 km · Belterra 158 km · Santarém 167 km · Brasil Novo 197 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 Placas (-3.8678°, -54.22°, elevation 104 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).