Santana do Araguaia weather in December

In December, Santana do Araguaia sees average daytime highs of 30°C and overnight lows near 23°C, with 274 mm of rain across 26.9 wet days and about 12.5 hours of daylight. It is the 9th-warmest and 4th-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 30 min at the start of December to 12 h 30 min by month's end. Set against the rest of the year, December is Santana do Araguaia's 9th-clearest and 8th-windiest month. For the whole year in context, see Santana do Araguaia's year-round climate.

Daytime high
30°
9th warmest
Overnight low
23°
9th coldest
Rainfall
274 mm
26.9 wet days
Daylight
12 h 30 min
6:01 AM – 6:34 PM
Cloud cover
84%
9th clearest
Wind
4 km/h
8th windiest
Solar energy
5.04 kWh/m²
Travel score
2.9
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 Santana do Araguaia reaches about 30°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 27°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)
13023
23023
33023
43023
53023
63023
73023
83023
93023
103023
113023
123023
133023
143023
153023
163023
173023
183023
193023
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023
313023

How December really feels in Santana do Araguaia

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.

Santana do Araguaia weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°31628.412.52.8
Feb30° / 22°27826.112.32.8
Mar30° / 23°29328.612.12.8
Apr31° / 23°21122.611.83.2
May32° / 22°8010.911.64.1
Jun33° / 22°51.111.54.6
Jul34° / 21°10.211.54.3
Aug35° / 22°40.811.73.3
Sep35° / 23°364.811.93.0
Oct32° / 23°13016.512.23.1
Nov31° / 23°2262412.42.9
Dec30° / 23°27426.912.52.9

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 9% of December, with mostly cloudy or overcast conditions the remaining 86%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11387
21387
31486
41387
51387
61387
71486
81486
91486
101486
111486
121486
131486
141387
151387
161387
171387
181486
191486
201486
211486
221486
231486
241387
251387
261387
271387
281486
291486
301486
311486

Chance of precipitation in December

Any precipitation

Santana do Araguaia gets around 274 mm of rain over 26.9 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 87% and peaks near 90% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
183
283
383
483
583
683
784
884
985
1085
1186
1287
1387
1487
1588
1688
1788
1888
1989
2089
2189
2289
2389
2489
2589
2689
2789
2889
2989
3090
3190

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 85% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
118019
218019
318019
418118
518118
608218
708218
808218
908317
1008317
1108317
1208416
1308416
1408515
1508515
1608614
1708713
1808713
1908713
2008812
2108812
2208812
2308911
2408911
2508911
2608911
2708911
2808911
2908911
3008812
3108812

Wind in December

Winds average 4 km/h in December.

Across December, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 30 min at the start of December to 12 h 30 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 5:56 AM to 6:08 AM, and sunset from 6:26 PM to 6:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:566:26
212.55:566:27
312.55:576:27
412.55:576:28
512.55:576:28
612.55:576:29
712.55:586:29
812.55:586:30
912.55:596:30
1012.55:596:31
1112.55:596:31
1212.56:006:32
1312.56:006:32
1412.56:006:33
1512.56:016:33
1612.56:016:34
1712.56:026:34
1812.56:026:35
1912.56:036:35
2012.56:036:36
2112.56:046:36
2212.56:046:37
2312.56:046:37
2412.56:056:38
2512.56:056:38
2612.56:066:39
2712.56:066:39
2812.56:076:39
2912.56:076:40
3012.56:086:40
3112.56:086:41

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.04 kWh/m².

For context, solar energy here swings from a low near 4.68 kWh/m² to a high of 5.99 kWh/m² in September across the year — December's 5.04 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in December

Hazard calendar for Santana do Araguaia

In seasonPeak

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

Santana do Araguaia's monsoon runs November–April, 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 Santana do Araguaia?

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
4.0
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Santana do Araguaia.

What to pack for Santana do Araguaia in December

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

In December, Santana do Araguaia sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

UV index in Santana do Araguaia in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Santana do Araguaia peaks around February 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 20UV 15Jun 21UV 9
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Extreme
Jun9Very high
Jul9Very high
Aug10Very high
Sep11Extreme
Oct10Extreme
Nov12Extreme
Dec11Extreme

Air quality in Santana do Araguaia 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 Santana do Araguaia is worst in September — around 128 µg/m³ PM2.5 (unhealthy), about 11.2× the cleanest month (February, 11 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateUnhealthyModerateSep 16117 µg/m³Feb 1212 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb11Good
Mar13Moderate
Apr12Moderate
May14Moderate
Jun16Moderate
Jul15Moderate
Aug44Poor
Sep128Unhealthy
Oct34Moderate
Nov19Moderate
Dec16Moderate
Location & terrain

Where is Santana do Araguaia?

Santana do Araguaia sits at 9.3°S, 50.4°W, 178 m above sea level, in Brazil. The nearest listed city is Santa Maria das Barreiras, 87 km away.

Topography around Santana do Araguaia

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

Within 3 km, the terrain around Santana do Araguaia has only modest variations in elevation — a maximum elevation change of 34 m around an average of 174 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 75 m; within 80 km, significant variations in elevation — a maximum elevation change of 574 m.

The land around Santana do Araguaia is covered by grassland (54%) within 3 km, grassland (61%) and trees (24%) within 16 km, and grassland (47%) and trees (45%) within 80 km.

3 km
34 m
16 km
75 m
80 km
574 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Santa Maria das Barreiras 87 km · Vila Rica 113 km · Redenção 149 km · Conceição do Araguaia 168 km · Lagoa da Confusão 181 km · Paraíso do Tocantins 188 km · Confresa 197 km · Guaraí 210 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 Santana do Araguaia (-9.335°, -50.35°, elevation 178 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).