Goiás weather in December

In December, Goiás sees average daytime highs of 29°C and overnight lows near 21°C, with 274 mm of rain across 25.6 wet days and about 12.9 hours of daylight. It is the 11th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 7% 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 Goiás's 12th-clearest and 9th-windiest month. For the whole year in context, see Goiás's year-round climate.

Daytime high
29°
11th warmest
Overnight low
21°
9th coldest
Rainfall
274 mm
25.6 wet days
Daylight
12 h 54 min
6:48 AM – 7:45 PM
Cloud cover
81%
12th clearest
Wind
6 km/h
9th windiest
Solar energy
5.25 kWh/m²
Travel score
3.3
out of 10

Goiás 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 29°C through the month.

A typical December day in Goiás reaches about 29°C in the afternoon and slips back to 21°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 33°C. Set against its neighbours, December runs about 1°C cooler than November and on par with January.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12921
22921
32921
42921
52921
62921
72921
82921
92921
102921
112921
122921
132921
142921
152921
162921
172921
182921
192921
202921
212921
222921
232921
242921
252921
262921
272921
282921
292921
302921
312921

How December really feels in Goiás

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.

Goiás weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 21°27825.112.83.4
Feb30° / 21°2172312.53.3
Mar30° / 21°21624.312.13.4
Apr31° / 21°9513.711.74.3
May31° / 20°132.511.35.6
Jun31° / 19°30.711.16.1
Jul31° / 19°10.211.15.9
Aug33° / 20°50.911.54.5
Sep34° / 22°275.411.93.3
Oct33° / 22°11616.612.43.0
Nov30° / 22°20423.412.73.2
Dec29° / 21°27425.612.93.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 10% of December, with mostly cloudy or overcast conditions the remaining 83%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11783
21783
31684
41585
51486
61585
71486
81486
91486
101486
111486
121486
131585
141585
151684
161783
171783
181783
191882
201882
211882
221981
231981
241882
251882
261981
271981
281882
291882
301882
311783

Chance of precipitation in December

Any precipitation

Goiás gets around 274 mm of rain over 25.6 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 83% and peaks near 85% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
184
285
385
485
585
685
785
885
985
1085
1184
1284
1384
1484
1584
1683
1783
1883
1982
2082
2181
2281
2380
2480
2580
2680
2779
2879
2979
3079
3179

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 49% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
145145
235146
334948
434849
524850
624751
724652
824652
924652
1024553
1124553
1224652
1324652
1424751
1524751
1624850
1724949
1824949
1925048
2025147
2125246
2225246
2325345
2425345
2525345
2625345
2725246
2825246
2925147
3025048
3124948

Wind in December

Winds average 6 km/h in December.

Across December, daily wind ranges from about 6 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
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
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 6:44 AM to 6:56 AM, and sunset from 7:37 PM to 7:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:447:37
212.96:447:37
312.96:447:38
412.96:457:38
512.96:457:39
612.96:457:40
712.96:457:40
812.96:467:41
912.96:467:41
1012.96:467:42
1112.96:477:42
1212.96:477:43
1312.96:477:43
1412.96:487:44
1512.96:487:44
1612.96:487:45
1712.96:497:46
1812.96:497:46
1912.96:507:47
2012.96:507:47
2112.96:517:47
2212.96:517:48
2312.96:527:48
2412.96:527:49
2512.96:537:49
2612.96:537:50
2712.96:547:50
2812.96:547:51
2912.96:557:51
3012.96:557:51
3112.96:567:52

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.25 kWh/m².

For context, solar energy here swings from a low near 4.56 kWh/m² to a high of 6.09 kWh/m² in October across the year — December's 5.25 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.1Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.4Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in December

Hazard calendar for Goiás

In seasonPeak

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

Goiás'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 Goiás?

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

3.3
Sightseeing
8th-best month of the year
4.4
Beach & pool
12th-best month of the year

December is a weaker month for outdoor sightseeing in Goiás.

What to pack for Goiás in December

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

In December, Goiás sees daytime highs around 29°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

UV index in Goiás 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 Goiás peaks around January 23 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 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 highExtremeJan 23UV 15Jun 22UV 8
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov13Extreme
Dec14Extreme

Air quality in Goiás 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 Goiás is worst in September — around 22 µg/m³ PM2.5 (moderate), about 4.9× the cleanest month (July, 4 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1820 µg/m³Jul 115 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar8Good
Apr7Good
May6Good
Jun5Good
Jul4Good
Aug8Good
Sep22Moderate
Oct14Moderate
Nov7Good
Dec7Good
Location & terrain

Where is Goiás?

Goiás sits at 15.9°S, 50.1°W, 496 m above sea level, in Brazil. The nearest listed city is Itaberaí, 37 km away.

Topography around Goiás

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

Within 3 km, the terrain around Goiás has significant variations in elevation — a maximum elevation change of 402 m around an average of 556 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 676 m; within 80 km, large variations in elevation — a maximum elevation change of 858 m.

The land around Goiás is covered by trees (69%) within 3 km, trees (48%) and grassland (41%) within 16 km, and grassland (50%), trees (25%) and cropland (23%) within 80 km.

3 km
402 m
16 km
676 m
80 km
858 m
treesshrubsgrasslandcroplandartificial surfaces
December weather nearby: Itaberaí 37 km · Itapuranga 46 km · Anicuns 62 km · São Luís de Montes Belos 70 km · Jussara 78 km · Inhumas 83 km · Jaraguá 88 km · Ceres 91 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 Goiás (-15.9344°, -50.1403°, elevation 496 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).