Diamantino weather in December

In December, Diamantino sees average daytime highs of 31°C and overnight lows near 22°C, with 224 mm of rain across 26 wet days and about 12.8 hours of daylight. It is the 7th-warmest and 4th-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 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 Diamantino's 10th-clearest and 6th-windiest month. For the whole year in context, see Diamantino's year-round climate.

Daytime high
31°
7th warmest
Overnight low
22°
12th coldest
Rainfall
224 mm
26 wet days
Daylight
12 h 48 min
6:17 AM – 7:07 PM
Cloud cover
81%
10th clearest
Wind
7 km/h
6th windiest
Solar energy
5.38 kWh/m²
Travel score
2.9
out of 10

Diamantino is human settlement in Diamantino municipality, 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 Diamantino reaches about 31°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 28°C and 33°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)
13122
23122
33122
43122
53122
63122
73122
83122
93122
103122
113022
123022
133022
143022
153022
163022
173022
183022
193122
203122
213122
223122
233122
243122
253122
263122
273022
283022
293022
303022
313022

How December really feels in Diamantino

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.

Diamantino weather by month

How December compares with the rest of the year at a glance. December is the 7th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°2672712.82.9
Feb30° / 22°24524.912.52.8
Mar31° / 22°22626.212.12.9
Apr31° / 22°1101711.73.9
May30° / 20°34611.35.5
Jun30° / 19°91.311.26.2
Jul31° / 18°40.811.26.2
Aug33° / 19°111.911.54.8
Sep33° / 21°488.511.93.6
Oct33° / 22°13018.912.33.0
Nov31° / 22°1932312.72.9
Dec31° / 22°2242612.82.9

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 12% of December, with mostly cloudy or overcast conditions the remaining 82%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11783
21684
31585
41585
51585
61585
71585
81684
91684
101684
111684
121684
131783
141882
151882
161882
171981
181981
192080
202080
212080
222080
232080
242080
252080
262080
272080
281981
291981
301981
311981

Chance of precipitation in December

Any precipitation

Diamantino gets around 224 mm of rain over 26 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 87% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
186
287
387
487
587
686
786
885
985
1085
1184
1284
1383
1483
1583
1682
1782
1882
1982
2082
2182
2282
2382
2483
2583
2684
2784
2885
2985
3085
3186

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 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
103961
203961
303961
403961
512961
612961
712961
812961
912961
1012961
1112961
1212961
1312961
1412961
1512961
1612961
1712961
1812961
1912961
2012961
2112961
2212961
2312961
2412961
2502971
2602971
2702971
2802971
2902971
3002971
3102971

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 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 6:12 AM to 6:24 AM, and sunset from 6:59 PM to 7:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:126:59
212.86:127:00
312.86:127:00
412.86:127:01
512.86:137:01
612.86:137:02
712.86:137:03
812.86:147:03
912.86:147:04
1012.86:147:04
1112.86:157:05
1212.86:157:05
1312.86:157:06
1412.86:167:06
1512.86:167:07
1612.86:177:07
1712.86:177:08
1812.96:177:08
1912.96:187:09
2012.96:187:09
2112.96:197:10
2212.96:197:10
2312.96:207:11
2412.96:207:11
2512.96:217:12
2612.96:217:12
2712.86:227:13
2812.86:227:13
2912.86:237:13
3012.86:237:14
3112.86:247:14

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.38 kWh/m².

For context, solar energy here swings from a low near 4.51 kWh/m² to a high of 5.94 kWh/m² in October across the year — December's 5.38 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.4Bright
165.4Bright
175.4Bright
185.4Bright
195.4Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
315.4Bright
Planning a trip in December

Hazard calendar for Diamantino

In seasonPeak

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

Diamantino'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 Diamantino?

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

2.9
Sightseeing
8th-best month of the year
4.1
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Diamantino.

What to pack for Diamantino in December

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

In December, Diamantino sees daytime highs around 31°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 Diamantino 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 Diamantino peaks around January 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 15 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeJan 22UV 15Sep 15UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep5Moderate
Oct11Extreme
Nov13Extreme
Dec13Extreme

Air quality in Diamantino 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 Diamantino is worst in September — around 50 µg/m³ PM2.5 (poor), about 7.8× the cleanest month (July, 6 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodSep 1646 µg/m³Jul 107 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar10Good
Apr9Good
May8Good
Jun7Good
Jul6Good
Aug20Moderate
Sep50Poor
Oct20Moderate
Nov11Good
Dec10Good
Location & terrain

Where is Diamantino?

Diamantino sits at 14.4°S, 56.4°W, 282 m above sea level, in Brazil. The nearest listed city is Nobres, 37 km away.

Topography around Diamantino

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

Within 3 km, the terrain around Diamantino has only modest variations in elevation — a maximum elevation change of 237 m around an average of 303 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 327 m; within 80 km, significant variations in elevation — a maximum elevation change of 542 m.

The land around Diamantino is covered by trees (49%) and grassland (32%) within 3 km, trees (47%), grassland (23%) and cropland (22%) within 16 km, and trees (45%), grassland (29%) and cropland (22%) within 80 km.

3 km
237 m
16 km
327 m
80 km
542 m
treesshrubsgrasslandcroplandartificial surfaces
December weather nearby: Nobres 37 km · Rosário Oeste 48 km · Nova Mutum 75 km · Nova Olímpia 100 km · Barra do Bugres 108 km · Tangará da Serra 114 km · Cuiabá 137 km · Chapada dos Guimarães 139 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 Diamantino (-14.4086°, -56.4461°, elevation 282 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).