São Geraldo do Araguaia weather in December

In December, São Geraldo do Araguaia sees average daytime highs of 30°C and overnight lows near 23°C, with 213 mm of rain across 24.9 wet days and about 12.4 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 18 min at the start of December to 12 h 24 min by month's end. Set against the rest of the year, December is São Geraldo do Araguaia's 9th-clearest and 8th-windiest month. For the whole year in context, see São Geraldo do Araguaia's year-round climate.

Daytime high
30°
9th warmest
Overnight low
23°
9th coldest
Rainfall
213 mm
24.9 wet days
Daylight
12 h 24 min
5:59 AM – 6:21 PM
Cloud cover
80%
9th clearest
Wind
5 km/h
8th windiest
Solar energy
4.93 kWh/m²
Travel score
3.0
out of 10

São Geraldo do Araguaia 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 São Geraldo do Araguaia reaches about 30°C in the afternoon and slips back to 23°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°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)
13123
23123
33123
43123
53123
63123
73123
83123
93123
103123
113123
123123
133023
143023
153023
163023
173023
183023
193023
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023
313023

How December really feels in São Geraldo 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.

São Geraldo 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° / 23°26928.612.32.8
Feb30° / 23°27725.812.22.7
Mar30° / 23°28328.4122.7
Apr31° / 23°20023.811.93.0
May31° / 23°10114.111.73.9
Jun33° / 22°132.611.64.5
Jul33° / 22°5111.74.2
Aug34° / 23°5111.83.6
Sep34° / 24°234123.5
Oct33° / 24°7912.312.13.5
Nov31° / 23°16520.112.33.2
Dec30° / 23°21324.912.43.0

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 83%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12278
22278
32278
42179
52179
62080
72080
81981
91981
101882
111783
121783
131684
141684
151684
161585
171585
181585
191585
201585
211585
221585
231585
241585
251585
261486
271585
281585
291585
301486
311486

Chance of precipitation in December

Any precipitation

São Geraldo do Araguaia gets around 213 mm of rain over 24.9 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 81% and peaks near 88% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
172
272
372
472
572
673
773
874
975
1076
1177
1278
1379
1480
1581
1682
1783
1883
1984
2085
2185
2286
2387
2487
2587
2688
2788
2888
2988
3088
3188

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 92% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
18812
28812
38812
48911
58911
68911
79010
89010
99010
10919
11919
12919
13928
14928
15928
16937
17937
18937
19937
20937
21937
22937
23937
24937
25937
26937
27937
28937
29937
30937
31928

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 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 12 h 18 min at the start of December to 12 h 24 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 5:54 AM to 6:06 AM, and sunset from 6:14 PM to 6:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:546:14
212.35:546:15
312.35:546:15
412.45:556:16
512.45:556:16
612.45:556:17
712.45:566:17
812.45:566:18
912.45:566:18
1012.45:576:19
1112.45:576:19
1212.45:586:20
1312.45:586:20
1412.45:586:20
1512.45:596:21
1612.45:596:21
1712.46:006:22
1812.46:006:22
1912.46:016:23
2012.46:016:23
2112.46:026:24
2212.46:026:24
2312.46:036:25
2412.46:036:25
2512.46:036:26
2612.46:046:26
2712.46:046:27
2812.46:056:27
2912.46:056:28
3012.46:066:28
3112.46:066:28

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.93 kWh/m².

For context, solar energy here swings from a low near 4.5 kWh/m² to a high of 6.21 kWh/m² in September across the year — December's 4.93 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in December

Hazard calendar for São Geraldo do Araguaia

In seasonPeak

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

São Geraldo 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 São Geraldo do Araguaia?

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

3.0
Sightseeing
8th-best month of the year
4.3
Beach & pool
9th-best month of the year

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

What to pack for São Geraldo do Araguaia in December

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

In December, São Geraldo do Araguaia sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

UV index in São Geraldo do Araguaia in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in São Geraldo do Araguaia peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 12UV 15Jul 12UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct11Extreme
Nov11Extreme
Dec10Extreme

Air quality in São Geraldo 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 São Geraldo do Araguaia is worst in September — around 42 µg/m³ PM2.5 (poor), about 6.2× the cleanest month (July, 7 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateModerateSep 1839 µg/m³Jul 107 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb12Good
Mar12Good
Apr12Good
May9Good
Jun8Good
Jul7Good
Aug16Moderate
Sep42Poor
Oct26Moderate
Nov24Moderate
Dec17Moderate
Location & terrain

Where is São Geraldo do Araguaia?

São Geraldo do Araguaia sits at 6.4°S, 48.6°W, 131 m above sea level, in Brazil. The nearest listed city is Eldorado dos Carajás, 94 km away.

Topography around São Geraldo do Araguaia

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

Within 3 km, the terrain around São Geraldo do Araguaia has only modest variations in elevation — a maximum elevation change of 97 m around an average of 133 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 450 m; within 80 km, significant variations in elevation — a maximum elevation change of 492 m.

The land around São Geraldo do Araguaia is covered by grassland (38%) and water (30%) within 3 km, grassland (57%) and trees (36%) within 16 km, and grassland (64%) and trees (34%) within 80 km.

3 km
97 m
16 km
450 m
80 km
492 m
treesgrasslandartificial surfaceswater
December weather nearby: Eldorado dos Carajás 94 km · Araguaína 96 km · Araguatins 97 km · São Domingos do Araguaia 98 km · Curionópolis 120 km · Estreito 124 km · Tocantinópolis 126 km · Porto Franco 128 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 São Geraldo do Araguaia (-6.4006°, -48.555°, elevation 131 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).