Mossoró weather in December

In December, Mossoró sees average daytime highs of 35°C and overnight lows near 24°C, with 16 mm of rain across 4.2 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 43% of the time in December, and the air most often feels muggy.

Daylight stretches from about 12 h 18 min at the start of December to 12 h 18 min by month's end. Set against the rest of the year, December is Mossoró's 5th-clearest and 4th-windiest month. For the whole year in context, see Mossoró's year-round climate.

Daytime high
35°
4th warmest
Overnight low
24°
12th coldest
Rainfall
16 mm
4.2 wet days
Daylight
12 h 18 min
5:17 AM – 5:35 PM
Cloud cover
50%
5th clearest
Wind
17 km/h
4th windiest
Solar energy
6.33 kWh/m²
Travel score
3.2
out of 10

Mossoró 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 35°C through the month.

A typical December day in Mossoró reaches about 35°C in the afternoon and slips back to 24°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 36°C. Set against its neighbours, December runs on par with November and about 1°C warmer than January.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13524
23524
33524
43524
53524
63524
73524
83524
93524
103524
113524
123524
133524
143524
153524
163424
173424
183424
193424
203424
213424
223424
233424
243424
253424
263424
273424
283424
293424
303424
313424

How December really feels in Mossoró

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.

Mossoró weather by month

How December compares with the rest of the year at a glance. December is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan34° / 24°681212.33.0
Feb33° / 24°8313.312.23.1
Mar32° / 24°12718.3123.1
Apr32° / 24°11716.811.93.3
May33° / 24°56911.83.8
Jun32° / 23°295.911.74.2
Jul33° / 22°18311.74.2
Aug34° / 22°30.511.83.7
Sep35° / 23°10.2123.3
Oct35° / 23°20.212.13.1
Nov35° / 24°30.512.23.2
Dec35° / 24°164.212.33.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% 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 35%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17030
27129
37129
47129
57129
67030
77030
87030
97030
106931
116931
126931
136832
146832
156733
166634
176634
186535
196436
206436
216337
226238
236139
246139
256040
266040
275941
285941
295842
305743
315644

Chance of precipitation in December

Any precipitation

Mossoró gets around 16 mm of rain over 4.2 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 14% and peaks near 26% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
15
25
36
46
57
67
78
88
99
1010
1110
1211
1311
1412
1512
1613
1714
1814
1915
2016
2116
2217
2318
2419
2520
2621
2722
2823
2924
3025
3126

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the muggy band about 57% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
147026
246828
336829
436730
536532
636433
726335
826236
926137
1026038
1116039
1216039
1315940
1415940
1515841
1615841
1715841
1815841
1925642
2025642
2125642
2225543
2325444
2425345
2525246
2625147
2725048
2824849
2924751
3024652
3124454

Wind in December

Winds average 17 km/h in December.

Across December, daily wind ranges from about 16 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 18 min at the start of December to 12 h 18 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 5:11 AM to 5:24 AM, and sunset from 5:28 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:115:28
212.35:115:28
312.35:115:28
412.35:125:29
512.35:125:29
612.35:125:30
712.35:135:30
812.35:135:31
912.35:145:31
1012.35:145:32
1112.35:145:32
1212.35:155:33
1312.35:155:33
1412.35:165:34
1512.35:165:34
1612.35:175:35
1712.35:175:35
1812.35:175:35
1912.35:185:36
2012.35:185:36
2112.35:195:37
2212.35:195:37
2312.35:205:38
2412.35:205:38
2512.35:215:39
2612.35:215:39
2712.35:225:40
2812.35:225:40
2912.35:235:41
3012.35:235:41
3112.35:245:41

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 6.33 kWh/m².

For context, solar energy here swings from a low near 4.79 kWh/m² to a high of 6.83 kWh/m² in October across the year — December's 6.33 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.4Intense
86.4Intense
96.4Intense
106.4Intense
116.4Intense
126.4Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.3Intense
206.3Intense
216.3Intense
226.3Intense
236.3Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
316.2Intense
Planning a trip in December

Hazard calendar for Mossoró

In seasonPeak

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

Mossoró's rainy season runs January–April, 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 Mossoró?

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

3.2
Sightseeing
7th-best month of the year
6.6
Beach & pool
7th-best month of the year

December is a weaker month for outdoor sightseeing in Mossoró. The water and warmth also suit a beach or pool day.

What to pack for Mossoró in December

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

In December, Mossoró sees daytime highs around 35°C and nights near 24°C. Pack light clothes and sun protection. About 4 days see rain.

light clothessun protection

Sea temperature near Mossoró in December

The nearest coast averages about 28°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 42 km away) is warmest in April at about 29°C and coldest in August near 26°C.

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

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun28Warm
Jul27Warm
Aug26Warm
Sep27Warm
Oct27Warm
Nov28Warm
Dec28Tropical

UV index in Mossoró 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 Mossoró peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 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 highExtremeMar 15UV 15Jul 13UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec11Extreme
Location & terrain

Where is Mossoró?

Mossoró sits at 5.2°S, 37.3°W, 24 m above sea level, in Brazil. The nearest listed city is Baraúna, 32 km away.

Topography around Mossoró

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

Within 3 km, the terrain around Mossoró has only modest variations in elevation — a maximum elevation change of 44 m around an average of 17 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 140 m; within 80 km, significant variations in elevation — a maximum elevation change of 432 m.

The land around Mossoró is covered by artificial surfaces (60%) and grassland (24%) within 3 km, shrubs (57%) and grassland (26%) within 16 km, and shrubs (50%), grassland (21%) and water (20%) within 80 km.

3 km
44 m
16 km
140 m
80 km
432 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Baraúna 32 km · Areia Branca 34 km · Icapuí 53 km · Jaguaruana 62 km · Açu 65 km · Caraúbas 71 km · Quixeré 72 km · Apodi 73 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 Mossoró (-5.1875°, -37.3442°, elevation 24 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).