Belém weather in December

In December, Belém sees average daytime highs of 31°C and overnight lows near 25°C, with 109 mm of rain across 17.8 wet days and about 12.1 hours of daylight. It is the 5th-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 11% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of December to 12 h 06 min by month's end. Set against the rest of the year, December is Belém's 7th-clearest and 4th-windiest month. For the whole year in context, see Belém's year-round climate.

Daytime high
31°
5th warmest
Overnight low
25°
11th coldest
Rainfall
109 mm
17.8 wet days
Daylight
12 h 06 min
6:08 AM – 6:13 PM
Cloud cover
70%
7th clearest
Wind
10 km/h
4th windiest
Solar energy
5.32 kWh/m²
Travel score
3.5
out of 10

Belém 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 Belém reaches about 31°C in the afternoon and slips back to 25°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 32°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)
13225
23225
33225
43225
53225
63225
73225
83225
93125
103125
113125
123125
133125
143125
153125
163125
173125
183125
193125
203125
213125
223125
233125
243125
253125
263125
273125
283125
293125
303124
313124

How December really feels in Belém

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.

Belém weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°2322712.13.0
Feb30° / 24°31426.9122.8
Mar29° / 24°40430.4122.7
Apr30° / 24°39429.4122.6
May30° / 24°2562711.92.9
Jun31° / 24°1072011.93.6
Jul31° / 24°681511.94.1
Aug32° / 24°3610.1124.4
Sep32° / 24°246.7124.4
Oct32° / 25°276.4124.3
Nov32° / 25°447.412.14.2
Dec31° / 25°10917.812.13.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 23% of December, with mostly cloudy or overcast conditions the remaining 66%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24654
34555
44456
54456
64357
74357
84258
94258
104159
114060
123961
133961
143763
153664
163565
173367
183268
193169
203070
212872
222773
232674
242575
252476
262476
272377
282278
292278
302278
312278

Chance of precipitation in December

Any precipitation

Belém gets around 109 mm of rain over 17.8 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 57% and peaks near 79% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
131
232
334
435
537
638
740
842
944
1046
1148
1251
1353
1455
1557
1659
1761
1863
1965
2067
2169
2270
2371
2473
2574
2675
2776
2876
2977
3078
3179

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 65% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
17723
27624
37525
47426
57327
67228
77129
87030
96931
106832
116733
126634
136535
146436
156436
166337
176337
186238
196238
206139
216139
226040
235941
245941
255941
265842
275842
285842
295842
305842
315941

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
810calm
910calm
1010calm
1110calm
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 06 min at the start of December to 12 h 06 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 6:01 AM to 6:15 AM, and sunset from 6:06 PM to 6:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:016:06
212.16:026:07
312.16:026:07
412.16:036:07
512.16:036:08
612.16:036:08
712.16:046:09
812.16:046:09
912.16:056:09
1012.16:056:10
1112.16:056:10
1212.16:066:11
1312.16:066:11
1412.16:076:12
1512.16:076:12
1612.16:086:13
1712.16:086:13
1812.16:096:14
1912.16:096:14
2012.16:106:15
2112.16:106:15
2212.16:106:16
2312.16:116:16
2412.16:116:16
2512.16:126:17
2612.16:126:17
2712.16:136:18
2812.16:136:18
2912.16:146:19
3012.16:146:19
3112.16:156:20

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.32 kWh/m².

For context, solar energy here swings from a low near 4.2 kWh/m² to a high of 6.27 kWh/m² in October across the year — December's 5.32 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.4Bright
135.4Bright
145.4Bright
155.3Bright
165.3Bright
175.3Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.1Bright
235.1Bright
245.1Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
304.9Bright
314.9Bright
Planning a trip in December

Hazard calendar for Belém

In seasonPeak

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

Belém's monsoon runs January–May, 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 Belém?

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

3.5
Sightseeing
7th-best month of the year
5.3
Beach & pool
6th-best month of the year

December is a weaker month for outdoor sightseeing in Belém.

What to pack for Belém in December

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

In December, Belém sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

Sea temperature near Belém in December

The nearest coast averages about 29°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 16 km away) is warmest in June at about 29°C and coldest in March near 28°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb28Tropical
Mar28Tropical
Apr29Tropical
May29Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Belém in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Belém peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 19 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 16UV 15Jul 19UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct11Extreme
Nov10Extreme
Dec10Extreme

Air quality in Belém 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 Belém is worst in November — around 24 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (June, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 1523 µg/m³Jun 1510 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb21Moderate
Mar21Moderate
Apr17Moderate
May12Good
Jun10Good
Jul12Good
Aug13Moderate
Sep15Moderate
Oct19Moderate
Nov24Moderate
Dec18Moderate
Location & terrain

Where is Belém?

Belém sits at 1.5°S, 48.5°W, 15 m above sea level, in Brazil. The nearest listed city is Barcarena, 15 km away.

Topography around Belém

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

Within 3 km, the terrain around Belém has only modest variations in elevation — a maximum elevation change of 28 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 50 m; within 80 km, only modest variations in elevation — a maximum elevation change of 69 m.

The land around Belém is covered by water (61%) and artificial surfaces (36%) within 3 km, trees (55%) and water (28%) within 16 km, and trees (62%) within 80 km.

3 km
28 m
16 km
50 m
80 km
69 m
treesgrasslandartificial surfaceswaterwetlandmangroves
December weather nearby: Barcarena 15 km · Ananindeua 18 km · Marituba 21 km · Benevides 31 km · Santa Bárbara do Pará 35 km · Ponta de Pedras 41 km · Santa Isabel do Pará 42 km · Abaetetuba 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 Belém (-1.4558°, -48.5044°, elevation 15 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).