Diamantina weather in December

In December, Diamantina sees average daytime highs of 26°C and overnight lows near 18°C, with 270 mm of rain across 20.3 wet days and about 13.1 hours of daylight. It is the 6th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 11% of the time in December, and the air most often feels humid.

Daylight stretches from about 13 hours at the start of December to 13 h 06 min by month's end. Set against the rest of the year, December is Diamantina's 12th-clearest and 9th-windiest month. For the whole year in context, see Diamantina's year-round climate.

Daytime high
26°
6th warmest
Overnight low
18°
12th coldest
Rainfall
270 mm
20.3 wet days
Daylight
13 h 06 min
6:18 AM – 7:23 PM
Cloud cover
78%
12th clearest
Wind
7 km/h
9th windiest
Solar energy
5.43 kWh/m²
Travel score
4.9
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical December day in Diamantina reaches about 26°C in the afternoon and slips back to 18°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 29°C. Set against its neighbours, December runs on par with November and on par with January.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12618
22618
32618
42618
52618
62618
72618
82618
92618
102618
112618
122618
132618
142618
152618
162618
172618
182618
192618
202618
212618
222618
232618
242618
252618
262618
272618
282718
292718
302718
312718

Diamantina weather by month

How December compares with the rest of the year at a glance. December is the 6th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 18°18816.3135.4
Feb27° / 18°12612.512.65.8
Mar27° / 18°14715.812.15.6
Apr26° / 16°7610.711.66.6
May24° / 14°265.411.27.7
Jun23° / 13°81.910.98.3
Jul23° / 12°61.5118.5
Aug24° / 13°92.311.48.5
Sep26° / 14°365.711.97.4
Oct27° / 16°10511.112.46.3
Nov26° / 17°22618.912.95.0
Dec26° / 18°27020.313.14.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 78%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11684
21684
31585
41585
51585
61585
71684
81585
91585
101882
111882
121882
132080
142179
152278
162278
172575
182674
192674
202773
212773
222773
232773
242773
252872
262872
272872
282872
292971
302971
312872

Chance of precipitation in December

Any precipitation

Diamantina gets around 270 mm of rain over 20.3 wet days in December, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 65% and peaks near 70% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
169
269
369
470
570
670
770
870
970
1070
1169
1268
1368
1467
1566
1665
1764
1863
1963
2062
2161
2261
2360
2460
2560
2660
2760
2860
2959
3059
3159

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the humid band about 47% of days. Sticky, muggy-or-worse air turns up on roughly 44% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)
1115138
2105040
394942
494843
584745
674746
774647
874548
974548
1074449
1174449
1274449
1374448
1484448
1584547
1684546
1784646
1884745
1984744
2094843
2194943
2294942
2394942
2494942
25104941
26104941
27104841
28114841
29114741
30124741
31124741

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 13 hours at the start of December to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over December. Sunrise moves from 6:14 AM to 6:25 AM, and sunset from 7:15 PM to 7:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.06:147:15
213.06:147:15
313.06:147:16
413.06:147:16
513.06:147:17
613.06:157:18
713.16:157:18
813.16:157:19
913.16:157:19
1013.16:167:20
1113.16:167:21
1213.16:167:21
1313.16:177:22
1413.16:177:22
1513.16:187:23
1613.16:187:23
1713.16:187:24
1813.16:197:24
1913.16:197:25
2013.16:207:25
2113.16:207:26
2213.16:217:26
2313.16:217:27
2413.16:217:27
2513.16:227:28
2613.16:227:28
2713.16:237:28
2813.16:247:29
2913.16:247:29
3013.16:257:30
3113.16:257:30

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 3.89 kWh/m² to a high of 6.02 kWh/m² in February across the year — December's 5.43 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.2Bright
105.2Bright
115.2Bright
125.3Bright
135.3Bright
145.4Bright
155.4Bright
165.5Bright
175.5Bright
185.5Bright
195.6Bright
205.6Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in December

Hazard calendar for Diamantina

In seasonPeak

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

Diamantina's monsoon runs November–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 Diamantina?

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

4.9
Sightseeing
12th-best month of the year
4.8
Beach & pool
12th-best month of the year

December is a reasonable time to visit Diamantina for sightseeing.

What to pack for Diamantina in December

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

In December, Diamantina sees daytime highs around 26°C and nights near 18°C. Pack rain gear. Worth having: light clothes and sun protection. About 20 days see rain.

rain gearlight clothessun protection

UV index in Diamantina in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Diamantina peaks around February 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 13UV 15Jun 23UV 8
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov14Extreme
Dec14Extreme

Air quality in Diamantina 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 Diamantina is worst in September — around 15 µg/m³ PM2.5 (moderate), about 4.1× the cleanest month (July, 4 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 2015 µg/m³Jul 144 µg/m³
PM2.5 (µg/m³)Level
Jan5Good
Feb6Good
Mar5Good
Apr5Good
May5Good
Jun4Good
Jul4Good
Aug5Good
Sep15Moderate
Oct12Moderate
Nov7Good
Dec6Good
Location & terrain

Where is Diamantina?

Diamantina sits at 18.2°S, 43.6°W, 1,281 m above sea level, in Brazil. The nearest listed city is Serro, 46 km away.

Topography around Diamantina

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

Within 3 km, the terrain around Diamantina has significant variations in elevation — a maximum elevation change of 317 m around an average of 1,224 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 868 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,528 m.

The land around Diamantina is covered by grassland (65%) within 3 km, grassland (68%) and trees (26%) within 16 km, and trees (46%) and grassland (42%) within 80 km.

3 km
317 m
16 km
868 m
80 km
1,528 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
December weather nearby: Serro 46 km · Itamarandiba 90 km · Conceição do Mato Dentro 90 km · Corinto 91 km · Guanhães 92 km · São João Evangelista 95 km · Curvelo 104 km · Peçanha 115 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 Diamantina (-18.2469°, -43.6035°, elevation 1,281 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).