Arinos weather in December

In December, Arinos sees average daytime highs of 30°C and overnight lows near 21°C, with 208 mm of rain across 19 wet days and about 12.9 hours of daylight. It is the 9th-warmest and 1st-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 15% of the time in December, and the air most often feels muggy.

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 Arinos's 12th-clearest and 10th-windiest month. For the whole year in context, see Arinos's year-round climate.

Daytime high
30°
9th warmest
Overnight low
21°
10th coldest
Rainfall
208 mm
19 wet days
Daylight
12 h 54 min
6:32 AM – 7:29 PM
Cloud cover
74%
12th clearest
Wind
5 km/h
10th windiest
Solar energy
5.72 kWh/m²
Travel score
3.9
out of 10

Arinos 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 30°C through the month.

A typical December day in Arinos reaches about 30°C in the afternoon and slips back to 21°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 33°C. Set against its neighbours, December runs on par with November and on par with January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13021
23021
33021
43021
53021
63021
73021
83021
93021
103021
113021
123021
133021
143021
153021
163021
173021
183021
193021
203021
213021
223021
233021
243021
253021
263021
273021
283021
293021
303021
313021

How December really feels in Arinos

Once humidity and wind are folded in, December averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Arinos weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 21°16316.412.84.0
Feb31° / 21°11913.612.54.1
Mar30° / 21°15015.412.14.2
Apr30° / 20°518.111.75.2
May30° / 19°122.411.36.3
Jun29° / 17°30.411.17.2
Jul29° / 16°00.111.17.3
Aug31° / 17°20.511.56.2
Sep33° / 20°142.111.94.6
Oct33° / 22°758.712.43.7
Nov30° / 21°18717.412.73.8
Dec30° / 21°2081912.93.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% 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 73%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12278
22179
32179
42179
52179
62179
72179
82278
92278
102278
112377
122377
132575
142674
152773
162872
172971
182971
193169
203169
213169
223268
233268
243268
253268
263169
273169
283268
293169
303169
312971

Chance of precipitation in December

Any precipitation

Arinos gets around 208 mm of rain over 19 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 61% and peaks near 67% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
166
266
367
467
567
667
767
867
967
1066
1166
1265
1364
1463
1562
1661
1760
1859
1958
2057
2157
2256
2356
2456
2555
2655
2756
2856
2956
3056
3156

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 86% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11135927
21125928
31125829
41115830
51115731
61105732
71105633
81105534
91105534
101115434
111115335
121115434
131125334
141125334
151135333
161135432
172135431
182145430
192145628
202155627
211155826
221155925
231156024
241156024
251156024
261156024
271156024
281156024
291156024
301155925
311155925

Wind in December

Winds average 5 km/h in December.

Across December, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
276calm
286calm
296calm
306calm
316calm

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 6:28 AM to 6:40 AM, and sunset from 7:21 PM to 7:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:287:21
212.96:287:21
312.96:287:22
412.96:287:22
512.96:297:23
612.96:297:23
712.96:297:24
812.96:307:24
912.96:307:25
1012.96:307:26
1112.96:307:26
1212.96:317:27
1312.96:317:27
1412.96:327:28
1512.96:327:28
1612.96:327:29
1712.96:337:29
1812.96:337:30
1912.96:347:30
2012.96:347:31
2112.96:357:31
2212.96:357:32
2312.96:357:32
2412.96:367:33
2512.96:367:33
2612.96:377:34
2712.96:377:34
2812.96:387:34
2912.96:387:35
3012.96:397:35
3112.96:407:36

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.72 kWh/m².

For context, solar energy here swings from a low near 4.53 kWh/m² to a high of 6.36 kWh/m² in October across the year — December's 5.72 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.6Bright
135.6Bright
145.7Bright
155.7Bright
165.7Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in December

Hazard calendar for Arinos

In seasonPeak

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

Arinos'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 Arinos?

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

3.9
Sightseeing
10th-best month of the year
5.3
Beach & pool
12th-best month of the year

December is a weaker month for outdoor sightseeing in Arinos.

What to pack for Arinos in December

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

In December, Arinos sees daytime highs around 30°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 19 days see rain.

light clothesrain gearsun protection

UV index in Arinos 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 Arinos peaks around February 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 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 14UV 15Jul 10UV 8
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov14Extreme
Dec13Extreme
Location & terrain

Where is Arinos?

Arinos sits at 15.9°S, 46.1°W, 517 m above sea level, in Brazil. The nearest listed city is Urucuia, 46 km away.

Topography around Arinos

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

Within 3 km, the terrain around Arinos has only modest variations in elevation — a maximum elevation change of 47 m around an average of 514 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 452 m; within 80 km, significant variations in elevation — a maximum elevation change of 541 m.

The land around Arinos is covered by grassland (41%), shrubs (23%) and trees (20%) within 3 km, shrubs (34%), grassland (31%) and trees (27%) within 16 km, and shrubs (37%), grassland (29%) and trees (20%) within 80 km.

3 km
47 m
16 km
452 m
80 km
541 m
treesshrubsgrasslandcroplandartificial surfaceswater
December weather nearby: Urucuia 46 km · Buritis 48 km · Unaí 99 km · Brasilândia de Minas 122 km · São Francisco 133 km · Formosa 138 km · Paracatu 167 km · Planaltina 168 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 Arinos (-15.9169°, -46.1056°, elevation 517 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).