Nova Mutum weather in December

In December, Nova Mutum sees average daytime highs of 30°C and overnight lows near 22°C, with 239 mm of rain across 26.3 wet days and about 12.8 hours of daylight. It is the 10th-warmest and 2nd-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 5% of the time in December, and the air most often feels oppressive.

Daylight stretches from about 12 h 48 min at the start of December to 12 h 48 min by month's end. Set against the rest of the year, December is Nova Mutum's 11th-clearest and 6th-windiest month. For the whole year in context, see Nova Mutum's year-round climate.

Daytime high
30°
10th warmest
Overnight low
22°
10th coldest
Rainfall
239 mm
26.3 wet days
Daylight
12 h 48 min
6:16 AM – 7:05 PM
Cloud cover
82%
11th clearest
Wind
6 km/h
6th windiest
Solar energy
5.24 kWh/m²
Travel score
3.1
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 Nova Mutum reaches about 30°C in the afternoon and slips back to 22°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 32°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13022
23022
33022
43022
53022
63022
73022
83022
93022
103022
113022
123022
133022
143022
153022
163022
173022
183022
193022
203022
213022
223022
233022
243022
253022
263022
273022
283022
293022
303022
313022

How December really feels in Nova Mutum

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.

Nova Mutum weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°25926.412.73.1
Feb30° / 22°23425.112.53.0
Mar30° / 22°20125.612.13.1
Apr30° / 21°9715.811.74.1
May30° / 20°255.211.45.4
Jun31° / 19°60.911.26.0
Jul31° / 18°20.411.36.1
Aug33° / 20°91.611.54.7
Sep33° / 21°438.311.93.6
Oct32° / 22°12418.612.33.1
Nov31° / 22°19523.912.63.0
Dec30° / 22°23926.312.83.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 5% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 10% of December, with mostly cloudy or overcast conditions the remaining 85%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11387
21387
31288
41288
51288
61387
71387
81387
91387
101387
111486
121585
131585
141585
151585
161585
171783
181783
191783
201783
211783
221783
231882
241783
251783
261783
271684
281684
291684
301585
311486

Chance of precipitation in December

Any precipitation

Nova Mutum gets around 239 mm of rain over 26.3 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 84% and peaks near 85% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
184
284
384
485
585
685
785
885
985
1085
1185
1285
1385
1485
1585
1684
1784
1884
1984
2084
2184
2284
2384
2484
2584
2684
2784
2884
2984
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 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
10397
20397
30397
41396
51396
61396
71396
81396
91297
101297
111297
121297
131297
141297
151297
161297
171297
181297
191396
201297
211297
221297
231297
240298
250298
260298
270298
280298
290298
300298
310298

Wind in December

Winds average 6 km/h in December.

Across December, daily wind ranges from about 6 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
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 48 min at the start of December to 12 h 48 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 6:11 AM to 6:23 AM, and sunset from 6:57 PM to 7:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:116:57
212.86:126:57
312.86:126:58
412.86:126:58
512.86:126:59
612.86:137:00
712.86:137:00
812.86:137:01
912.86:147:01
1012.86:147:02
1112.86:147:02
1212.86:157:03
1312.86:157:03
1412.86:157:04
1512.86:167:04
1612.86:167:05
1712.86:177:05
1812.86:177:06
1912.86:177:06
2012.86:187:07
2112.86:187:07
2212.86:197:08
2312.86:197:08
2412.86:207:09
2512.86:207:09
2612.86:217:10
2712.86:217:10
2812.86:227:10
2912.86:227:11
3012.86:237:11
3112.86:237:12

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.24 kWh/m².

For context, solar energy here swings from a low near 4.65 kWh/m² to a high of 5.95 kWh/m² in October across the year — December's 5.24 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
315.2Bright
Planning a trip in December

Hazard calendar for Nova Mutum

In seasonPeak

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

Nova Mutum'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 Nova Mutum?

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

3.1
Sightseeing
7th-best month of the year
4.2
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Nova Mutum.

What to pack for Nova Mutum in December

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

In December, Nova Mutum sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

UV index in Nova Mutum 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 Nova Mutum peaks around January 24 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 15 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 24UV 15Sep 15UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep6High
Oct11Extreme
Nov13Extreme
Dec13Extreme

Air quality in Nova Mutum 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 Nova Mutum is worst in September — around 46 µg/m³ PM2.5 (poor), about 7.0× the cleanest month (July, 7 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModeratePoorModerateSep 1743 µg/m³Jul 117 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb10Good
Mar12Moderate
Apr11Good
May11Good
Jun8Good
Jul7Good
Aug18Moderate
Sep46Poor
Oct22Moderate
Nov13Moderate
Dec12Good
Location & terrain

Where is Nova Mutum?

Nova Mutum sits at 13.8°S, 56.1°W, 486 m above sea level, in Brazil. The nearest listed city is Diamantino, 75 km away.

Topography around Nova Mutum

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

Within 3 km, the terrain around Nova Mutum has only modest variations in elevation — a maximum elevation change of 95 m around an average of 462 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 149 m; within 80 km, significant variations in elevation — a maximum elevation change of 435 m.

The land around Nova Mutum is covered by artificial surfaces (34%) and cropland (28%) within 3 km, cropland (50%) and trees (35%) within 16 km, and trees (45%) and cropland (41%) within 80 km.

3 km
95 m
16 km
149 m
80 km
435 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
December weather nearby: Diamantino 75 km · Lucas do Rio Verde 86 km · Nobres 103 km · Rosário Oeste 118 km · Tapurah 130 km · Sorriso 148 km · Nova Olímpia 169 km · Tangará da Serra 175 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 Nova Mutum (-13.8289°, -56.0822°, elevation 486 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).