Muaná weather in December

In December, Muaná sees average daytime highs of 32°C and overnight lows near 25°C, with 105 mm of rain across 16.9 wet days and about 12.1 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 17% of the time in December, and the air most often feels miserable.

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 Muaná's 7th-clearest and 4th-windiest month. For the whole year in context, see Muaná's year-round climate.

Daytime high
32°
5th warmest
Overnight low
25°
10th coldest
Rainfall
105 mm
16.9 wet days
Daylight
12 h 06 min
6:10 AM – 6:16 PM
Cloud cover
67%
7th clearest
Wind
10 km/h
4th windiest
Solar energy
5.55 kWh/m²
Travel score
3.5
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical December day in Muaná reaches about 32°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 33°C. Set against its neighbours, December runs on par with 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
93225
103225
113225
123225
133225
143225
153225
163225
173225
183125
193125
203125
213125
223125
233125
243125
253125
263125
273125
283125
293124
303124
313124

How December really feels in Muaná

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.

Muaná weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°24327.712.12.8
Feb30° / 24°32526.8122.7
Mar30° / 24°43530.5122.7
Apr30° / 24°42229.6122.6
May31° / 24°30527.911.92.8
Jun31° / 24°14221.111.93.4
Jul31° / 24°7815.311.94.0
Aug32° / 25°328.6124.4
Sep32° / 25°174.7124.5
Oct32° / 25°194.7124.4
Nov32° / 25°366.712.14.1
Dec32° / 25°10516.912.13.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 22% of December, with mostly cloudy or overcast conditions the remaining 61%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25149
35149
45149
55149
65149
75050
85050
94951
104753
114753
124456
134456
144258
154060
163961
173862
183664
193466
203367
213268
223169
233070
242971
252872
262872
272773
282773
292773
302773
312773

Chance of precipitation in December

Any precipitation

Muaná gets around 105 mm of rain over 16.9 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 55% and peaks near 78% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
129
230
331
433
534
636
737
839
941
1043
1145
1247
1349
1452
1554
1656
1758
1860
1962
2064
2166
2268
2369
2470
2572
2673
2774
2875
2976
3077
3178

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the miserable band about 52% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
16634
26535
36436
46337
56139
66040
75941
85743
95644
105446
115347
125149
135050
144852
154753
164555
174456
184357
194258
204159
214060
223961
233862
243763
253763
263763
273664
283664
293664
303664
313664

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
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
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 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 6:04 AM to 6:17 AM, and sunset from 6:09 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:046:09
212.16:056:09
312.16:056:10
412.16:056:10
512.16:066:11
612.16:066:11
712.16:066:12
812.16:076:12
912.16:076:12
1012.16:086:13
1112.16:086:13
1212.16:096:14
1312.16:096:14
1412.16:096:15
1512.16:106:15
1612.16:106:16
1712.16:116:16
1812.16:116:17
1912.16:126:17
2012.16:126:18
2112.16:136:18
2212.16:136:18
2312.16:146:19
2412.16:146:19
2512.16:156:20
2612.16:156:20
2712.16:166:21
2812.16:166:21
2912.16:166:22
3012.16:176:22
3112.16:176:23

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.55 kWh/m².

For context, solar energy here swings from a low near 4.45 kWh/m² to a high of 6.56 kWh/m² in October across the year — December's 5.55 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.7Bright
115.7Bright
125.7Bright
135.6Bright
145.6Bright
155.6Bright
165.5Bright
175.5Bright
185.5Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in December

Hazard calendar for Muaná

In seasonPeak

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

Muaná'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 Muaná?

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

3.5
Sightseeing
6th-best month of the year
5.4
Beach & pool
6th-best month of the year

December is a weaker month for outdoor sightseeing in Muaná.

What to pack for Muaná in December

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

In December, Muaná sees daytime highs around 32°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 17 days see rain.

light clothesrain gearsun protection

Sea temperature near Muaná 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 68 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 Muaná 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 Muaná peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 15UV 15Jul 24UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun10Extreme
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov10Extreme
Dec10Extreme

Air quality in Muaná 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 Muaná is worst in February — around 19 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (June, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateFeb 2019 µg/m³Jun 239 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb19Moderate
Mar19Moderate
Apr16Moderate
May11Good
Jun9Good
Jul9Good
Aug11Good
Sep13Moderate
Oct16Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Muaná?

Muaná sits at 1.5°S, 49.2°W, 7 m above sea level, in Brazil. The nearest listed city is São Sebastião da Boa Vista, 41 km away.

Topography around Muaná

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

Within 3 km, the terrain around Muaná has only modest variations in elevation — a maximum elevation change of 32 m around an average of 13 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 32 m; within 80 km, only modest variations in elevation — a maximum elevation change of 52 m.

The land around Muaná is covered by trees (88%) within 3 km, trees (66%) and water (23%) within 16 km, and trees (62%) within 80 km.

3 km
32 m
16 km
32 m
80 km
52 m
treesgrasslandartificial surfaceswaterwetland
December weather nearby: São Sebastião da Boa Vista 41 km · Ponta de Pedras 41 km · Abaetetuba 43 km · Limoeiro do Ajuru 45 km · Igarapé Miri 57 km · Moju 64 km · Cachoeira do Arari 64 km · Barcarena 66 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 Muaná (-1.5283°, -49.2167°, elevation 7 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).