Cuiabá weather in December

In December, Cuiabá sees average daytime highs of 31°C and overnight lows near 23°C, with 215 mm of rain across 25.3 wet days and about 12.9 hours of daylight. It is the 5th-warmest and 3rd-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 8% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 54 min at the start of December to 12 h 54 min by month's end. Set against the rest of the year, December is Cuiabá's 10th-clearest and 5th-windiest month. For the whole year in context, see Cuiabá's year-round climate.

Daytime high
31°
5th warmest
Overnight low
23°
12th coldest
Rainfall
215 mm
25.3 wet days
Daylight
12 h 54 min
6:13 AM – 7:08 PM
Cloud cover
78%
10th clearest
Wind
7 km/h
5th windiest
Solar energy
5.56 kWh/m²
Travel score
2.7
out of 10

Cuiabá 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 Cuiabá reaches about 31°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 34°C. Set against its neighbours, December runs on par with November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13223
23223
33123
43123
53123
63123
73123
83123
93123
103123
113123
123123
133123
143123
153123
163123
173123
183123
193123
203123
213123
223123
233123
243123
253123
263123
273123
283123
293123
303123
313123

How December really feels in Cuiabá

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.

Cuiabá weather by month

How December compares with the rest of the year at a glance. December is the 5th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°24825.712.82.8
Feb31° / 23°21824.312.52.7
Mar31° / 23°20825.212.12.8
Apr31° / 22°10015.111.73.9
May30° / 20°355.511.35.4
Jun30° / 19°111.311.16.1
Jul31° / 18°60.811.26.2
Aug33° / 20°111.911.54.7
Sep34° / 22°477.211.93.4
Oct33° / 23°13217.412.42.8
Nov32° / 23°1792112.72.9
Dec31° / 23°21525.312.92.7

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 79%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12377
22179
32179
42080
51981
61981
71981
81981
91981
102080
112080
122080
132179
142179
152179
162278
172278
182278
192476
202476
212476
222476
232476
242476
252377
262278
272278
282278
292278
302278
312278

Chance of precipitation in December

Any precipitation

Cuiabá gets around 215 mm of rain over 25.3 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 82% and peaks near 82% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
179
280
380
481
581
682
782
882
982
1082
1182
1282
1382
1482
1582
1682
1782
1882
1982
2082
2181
2281
2382
2482
2582
2682
2782
2882
2982
3082
3182

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 89% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
104897
204897
303907
403898
503898
603898
703898
813888
913888
1012898
1112898
1212898
1312898
1412898
1512898
1612898
1712898
1812898
1912898
2012898
2112898
2211908
2311908
2411908
2511917
2601927
2701927
2801927
2901918
3001918
3101918

Wind in December

Winds average 7 km/h in December.

Across December, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 54 min at the start of December to 12 h 54 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 6:08 AM to 6:20 AM, and sunset from 7:00 PM to 7:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:087:00
212.96:097:01
312.96:097:01
412.96:097:02
512.96:097:02
612.96:097:03
712.96:107:03
812.96:107:04
912.96:107:04
1012.96:117:05
1112.96:117:06
1212.96:117:06
1312.96:127:07
1412.96:127:07
1512.96:137:08
1612.96:137:08
1712.96:137:09
1812.96:147:09
1912.96:147:10
2012.96:157:10
2112.96:157:11
2212.96:167:11
2312.96:167:12
2412.96:177:12
2512.96:177:13
2612.96:187:13
2712.96:187:13
2812.96:197:14
2912.96:197:14
3012.96:207:15
3112.96:207:15

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.56 kWh/m².

For context, solar energy here swings from a low near 4.45 kWh/m² to a high of 6.05 kWh/m² in October across the year — December's 5.56 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
315.6Bright
Planning a trip in December

Hazard calendar for Cuiabá

In seasonPeak

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

Cuiabá's monsoon runs October–March, 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 Cuiabá?

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

2.7
Sightseeing
11th-best month of the year
4.2
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Cuiabá.

What to pack for Cuiabá in December

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

In December, Cuiabá sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

UV index in Cuiabá in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cuiabá peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 14 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 21UV 15Sep 14UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug9Very high
Sep7High
Oct11Extreme
Nov13Extreme
Dec13Extreme

Air quality in Cuiabá 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 Cuiabá is worst in September — around 70 µg/m³ PM2.5 (unhealthy), about 6.6× the cleanest month (January, 11 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateUnhealthyModerateSep 1566 µg/m³Apr 1611 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar11Good
Apr11Good
May11Good
Jun11Good
Jul14Moderate
Aug39Poor
Sep70Unhealthy
Oct23Moderate
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Cuiabá?

Cuiabá sits at 15.6°S, 56.1°W, 193 m above sea level, in Brazil. The nearest listed city is Várzea Grande, 7.0 km away.

Topography around Cuiabá

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

Within 3 km, the terrain around Cuiabá has only modest variations in elevation — a maximum elevation change of 90 m around an average of 179 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 134 m; within 80 km, large variations in elevation — a maximum elevation change of 795 m.

The land around Cuiabá is covered by artificial surfaces (77%) within 3 km, grassland (37%), trees (34%) and artificial surfaces (21%) within 16 km, and trees (44%) and grassland (39%) within 80 km.

3 km
90 m
16 km
134 m
80 km
795 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Várzea Grande 7.0 km · Santo Antônio do Leverger 30 km · Chapada dos Guimarães 40 km · Lucas 84 km · Rosário Oeste 92 km · Poconé 93 km · Campo Verde 100 km · Nobres 100 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 Cuiabá (-15.5961°, -56.0967°, elevation 193 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).