Belterra weather in December

In December, Belterra sees average daytime highs of 30°C and overnight lows near 25°C, with 240 mm of rain across 21.9 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 30°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 12 min by month's end. Set against the rest of the year, December is Belterra's 7th-clearest and 5th-windiest month. For the whole year in context, see Belterra's year-round climate.

Daytime high
30°
5th warmest
Overnight low
25°
8th coldest
Rainfall
240 mm
21.9 wet days
Daylight
12 h 12 min
6:31 AM – 6:40 PM
Cloud cover
75%
7th clearest
Wind
10 km/h
5th windiest
Solar energy
5.17 kWh/m²
Travel score
3.4
out of 10

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 Belterra reaches about 30°C in the afternoon and slips back to 25°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 28°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)
13126
23126
33126
43126
53126
63126
73126
83126
93126
103126
113126
123026
133026
143025
153025
163025
173025
183025
193025
203025
213025
223025
233025
243025
253025
263025
273025
283025
293025
303025
313025

How December really feels in Belterra

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.

Belterra 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
Jan29° / 25°4122812.13.1
Feb29° / 24°39426.112.13.1
Mar29° / 24°49329.2123.0
Apr29° / 25°4482911.92.9
May29° / 25°33729.511.93.1
Jun29° / 25°15723.111.93.7
Jul30° / 25°11119.211.94.3
Aug31° / 26°7813.511.94.4
Sep32° / 26°7612.3124.1
Oct32° / 26°11212.712.13.9
Nov31° / 26°15717.212.13.6
Dec30° / 25°24021.912.13.4

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 15% of December, with mostly cloudy or overcast conditions the remaining 74%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13466
23466
33367
43367
53169
63169
73070
83070
92872
102872
112872
122773
132674
142575
152476
162377
172377
182278
192377
202377
212377
222377
232278
242179
252278
262278
272278
282179
292179
302179
312179

Chance of precipitation in December

Any precipitation

Belterra gets around 240 mm of rain over 21.9 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 71% and peaks near 84% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
156
257
357
458
558
659
760
862
963
1065
1166
1268
1369
1471
1572
1673
1775
1876
1976
2077
2178
2279
2380
2480
2581
2682
2782
2883
2983
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 97% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
11954
21954
31963
41963
51963
61963
71972
80982
90982
100982
110982
120982
130982
140982
150982
160982
170982
180982
190982
200982
210973
220973
230973
240973
250973
260973
270973
280973
290973
300973
310973

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 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
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 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 6:25 AM to 6:38 AM, and sunset from 6:34 PM to 6:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:256:34
212.16:266:34
312.16:266:35
412.16:266:35
512.16:276:35
612.16:276:36
712.16:276:36
812.16:286:37
912.16:286:37
1012.16:296:38
1112.16:296:38
1212.26:306:39
1312.26:306:39
1412.26:306:40
1512.26:316:40
1612.26:316:40
1712.26:326:41
1812.26:326:41
1912.26:336:42
2012.26:336:42
2112.26:346:43
2212.26:346:43
2312.26:356:44
2412.26:356:44
2512.26:366:45
2612.26:366:45
2712.26:376:46
2812.26:376:46
2912.26:376:47
3012.26:386:47
3112.26:386:47

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.17 kWh/m².

For context, solar energy here swings from a low near 4.16 kWh/m² to a high of 6.18 kWh/m² in October across the year — December's 5.17 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.4Bright
85.4Bright
95.4Bright
105.3Bright
115.3Bright
125.3Bright
135.2Bright
145.2Bright
155.2Bright
165.1Bright
175.1Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in December

Hazard calendar for Belterra

In seasonPeak

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

Belterra'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 Belterra?

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

3.4
Sightseeing
7th-best month of the year
4.8
Beach & pool
7th-best month of the year

December is a weaker month for outdoor sightseeing in Belterra.

What to pack for Belterra in December

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

In December, Belterra sees daytime highs around 30°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

UV index in Belterra 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 Belterra peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 18 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 highExtremeExtremeMar 12UV 15Nov 18UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Extreme
Sep11Extreme
Oct12Extreme
Nov10Very high
Dec11Extreme

Air quality in Belterra 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 Belterra is worst in November — around 50 µg/m³ PM2.5 (poor), about 5.5× the cleanest month (June, 9 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModeratePoorModerateNov 1050 µg/m³Jun 169 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb15Moderate
Mar15Moderate
Apr13Moderate
May10Good
Jun9Good
Jul10Good
Aug15Moderate
Sep24Moderate
Oct47Poor
Nov50Poor
Dec27Moderate
Location & terrain

Where is Belterra?

Belterra sits at 2.6°S, 54.9°W, 169 m above sea level, in Brazil. The nearest listed city is Mojuí dos Campos, 33 km away.

Topography around Belterra

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

Within 3 km, the terrain around Belterra has only modest variations in elevation — a maximum elevation change of 161 m around an average of 147 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 194 m; within 80 km, only modest variations in elevation — a maximum elevation change of 239 m.

The land around Belterra is covered by trees (61%) and grassland (38%) within 3 km, trees (48%), water (29%) and grassland (24%) within 16 km, and trees (57%) and water (26%) within 80 km.

3 km
161 m
16 km
194 m
80 km
239 m
treesgrasslandartificial surfaceswaterwetland
December weather nearby: Mojuí dos Campos 33 km · Santarém 33 km · Alenquer 80 km · Óbidos 103 km · Aveiro 116 km · Monte Alegre 119 km · Juruti 139 km · Oriximiná 142 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 Belterra (-2.6364°, -54.9372°, elevation 169 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).