Vitória do Mearim weather in December

In December, Vitória do Mearim sees average daytime highs of 34°C and overnight lows near 25°C, with 99 mm of rain across 14.2 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 17% 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 Vitória do Mearim's 7th-clearest and 4th-windiest month. For the whole year in context, see Vitória do Mearim's year-round climate.

Daytime high
34°
4th warmest
Overnight low
25°
10th coldest
Rainfall
99 mm
14.2 wet days
Daylight
12 h 12 min
5:50 AM – 6:02 PM
Cloud cover
68%
7th clearest
Wind
10 km/h
4th windiest
Solar energy
5.43 kWh/m²
Travel score
2.7
out of 10

Vitória do Mearim is 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 34°C through the month.

A typical December day in Vitória do Mearim reaches about 34°C in the afternoon and slips back to 25°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 36°C. Set against its neighbours, December runs about 1°C cooler than November and about 2°C warmer than January.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13425
23425
33425
43425
53425
63425
73425
83425
93425
103425
113425
123425
133425
143425
153425
163425
173425
183425
193425
203425
213425
223325
233325
243325
253325
263325
273325
283325
293325
303325
313325

How December really feels in Vitória do Mearim

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
12 feel dangerously hot (≥ 39°C)
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.

Vitória do Mearim weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 24°24824.212.22.6
Feb32° / 24°28324.712.12.5
Mar31° / 24°36029.1122.4
Apr31° / 24°35427.611.92.4
May32° / 24°19221.911.83.0
Jun32° / 24°6312.111.84.1
Jul32° / 24°386.711.84.4
Aug34° / 24°102.411.93.9
Sep35° / 25°71.3123.2
Oct35° / 25°183.612.12.8
Nov35° / 25°436.912.22.8
Dec34° / 25°9914.212.22.7

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 20% of December, with mostly cloudy or overcast conditions the remaining 63%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24852
34852
44753
54753
64753
74555
84555
94456
104357
114357
124258
134159
144060
153961
163862
173664
183664
193367
203268
213268
223169
233169
243070
252971
262971
272872
282872
292674
302674
312575

Chance of precipitation in December

Any precipitation

Vitória do Mearim gets around 99 mm of rain over 14.2 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 46% and peaks near 66% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
129
229
330
431
531
632
733
834
935
1037
1138
1239
1340
1442
1543
1645
1746
1848
1949
2051
2153
2254
2356
2457
2559
2660
2761
2863
2964
3065
3166

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 85% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
17876
27876
36886
46877
56877
65887
75887
85887
94897
104897
113898
123898
133898
143889
153889
1628810
1728810
1828711
1938512
2038413
2138314
2238215
2338116
2438017
2537918
2637819
2737720
2837720
2937621
3037522
3127622

Wind in December

Winds average 10 km/h in December.

Across December, daily wind ranges from about 8 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
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
318calm

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 5:44 AM to 5:57 AM, and sunset from 5:55 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.25:445:55
212.25:445:55
312.25:445:56
412.25:455:56
512.25:455:57
612.25:455:57
712.25:465:57
812.25:465:58
912.25:475:58
1012.25:475:59
1112.25:475:59
1212.25:486:00
1312.25:486:00
1412.25:496:01
1512.25:496:01
1612.25:506:02
1712.25:506:02
1812.25:516:03
1912.25:516:03
2012.25:526:04
2112.25:526:04
2212.25:526:04
2312.25:536:05
2412.25:536:05
2512.25:546:06
2612.25:546:06
2712.25:556:07
2812.25:556:07
2912.25:566:08
3012.25:566:08
3112.25:576:09

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.43 kWh/m².

For context, solar energy here swings from a low near 4.3 kWh/m² to a high of 6.28 kWh/m² in October across the year — December's 5.43 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.4Bright
175.4Bright
185.4Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.1Bright
295.1Bright
305.1Bright
315.0Bright
Planning a trip in December

Hazard calendar for Vitória do Mearim

In seasonPeak

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

Vitória do Mearim'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 Vitória do Mearim?

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

2.7
Sightseeing
8th-best month of the year
5.3
Beach & pool
7th-best month of the year

December is a weaker month for outdoor sightseeing in Vitória do Mearim.

What to pack for Vitória do Mearim in December

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

In December, Vitória do Mearim sees daytime highs around 34°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 14 days see rain.

light clothesrain gearsun protection

UV index in Vitória do Mearim 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 Vitória do Mearim peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 14 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 17UV 15Jul 14UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Vitória do Mearim 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 Vitória do Mearim is worst in November — around 22 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (July, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 1621 µg/m³Jul 148 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb16Moderate
Mar15Moderate
Apr14Moderate
May10Good
Jun9Good
Jul8Good
Aug9Good
Sep11Good
Oct17Moderate
Nov22Moderate
Dec17Moderate
Location & terrain

Where is Vitória do Mearim?

Vitória do Mearim sits at 3.5°S, 44.9°W, 15 m above sea level, in Brazil. The nearest listed city is Arari, 10 km away.

Topography around Vitória do Mearim

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

Within 3 km, the terrain around Vitória do Mearim has only modest variations in elevation — a maximum elevation change of 30 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 48 m; within 80 km, only modest variations in elevation — a maximum elevation change of 109 m.

The land around Vitória do Mearim is covered by grassland (60%) within 3 km, grassland (53%) and trees (27%) within 16 km, and grassland (47%) and trees (36%) within 80 km.

3 km
30 m
16 km
48 m
80 km
109 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetlandmangroves
December weather nearby: Arari 10 km · Cajari 22 km · Viana 31 km · Miranda do Norte 34 km · Anajatuba 35 km · Penalva 38 km · Matões do Norte 40 km · Monção 42 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 Vitória do Mearim (-3.4622°, -44.8706°, 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. 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).