Chapadão do Sul weather in December

In December, Chapadão do Sul sees average daytime highs of 29°C and overnight lows near 21°C, with 276 mm of rain across 26.3 wet days and about 13.1 hours of daylight. It is the 7th-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 8% of the time in December, and the air most often feels muggy.

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 Chapadão do Sul's 11th-clearest and 8th-windiest month. For the whole year in context, see Chapadão do Sul's year-round climate.

Daytime high
29°
7th warmest
Overnight low
21°
11th coldest
Rainfall
276 mm
26.3 wet days
Daylight
13 h 06 min
5:53 AM – 7:00 PM
Cloud cover
78%
11th clearest
Wind
8 km/h
8th windiest
Solar energy
5.67 kWh/m²
Travel score
3.4
out of 10

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 Chapadão do Sul reaches about 29°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 26°C and 32°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)
12920
22920
32920
42920
52920
62920
72920
82920
92921
102921
112921
122921
132921
142921
152921
162921
172921
182921
192921
202921
212921
222921
232921
242921
252921
262921
272921
282921
292921
302921
312921

Chapadão do Sul weather by month

How December compares with the rest of the year at a glance. December is the 7th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 21°28525.8133.4
Feb29° / 21°25022.812.63.4
Mar29° / 20°2352412.13.7
Apr29° / 19°9712.711.65.3
May27° / 17°466.311.17.2
Jun27° / 16°152.310.98.0
Jul27° / 16°101.6118.1
Aug30° / 17°232.911.46.5
Sep31° / 19°859.511.94.8
Oct30° / 20°16019.612.43.7
Nov29° / 20°23022.912.93.6
Dec29° / 21°27626.313.13.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 78%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12377
22278
32179
42179
52080
62080
71981
81981
91981
101981
111981
122080
132179
142179
152278
162377
172476
182476
192575
202674
212674
222575
232575
242575
252377
262377
272278
282278
292179
302080
311981

Chance of precipitation in December

Any precipitation

Chapadão do Sul gets around 276 mm of rain over 26.3 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 84% and peaks near 87% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
182
283
383
484
584
684
784
884
983
1083
1183
1283
1383
1483
1583
1683
1784
1884
1984
2084
2185
2285
2385
2486
2586
2686
2787
2887
2986
3086
3186

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 83% of days. Sticky, muggy-or-worse air turns up on roughly 93% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
147827
236838
336838
435839
535839
6258310
7258310
8258211
9258211
10168211
11168211
12168112
13168112
14178012
15178012
16178012
17078112
18068311
19068311
20068311
21068311
22058510
23058510
24058510
2505869
2605869
2704879
2804879
29048610
30048610
31048610

Wind in December

Winds average 8 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

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 5:49 AM to 6:00 AM, and sunset from 6:52 PM to 7:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:496:52
213.15:496:52
313.15:496:53
413.15:496:54
513.15:496:54
613.15:506:55
713.15:506:55
813.15:506:56
913.15:516:56
1013.15:516:57
1113.15:516:58
1213.15:516:58
1313.15:526:59
1413.15:526:59
1513.15:537:00
1613.15:537:00
1713.15:537:01
1813.15:547:01
1913.15:547:02
2013.15:557:02
2113.15:557:03
2213.15:567:03
2313.15:567:04
2413.15:567:04
2513.15:577:05
2613.15:577:05
2713.15:587:06
2813.15:597:06
2913.15:597:06
3013.16:007:07
3113.16:007:07

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.67 kWh/m².

For context, solar energy here swings from a low near 4.13 kWh/m² to a high of 5.91 kWh/m² in October across the year — December's 5.67 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in December

Hazard calendar for Chapadão do Sul

In seasonPeak

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

Chapadão do Sul's monsoon runs October–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 Chapadão do Sul?

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

3.4
Sightseeing
10th-best month of the year
4.4
Beach & pool
12th-best month of the year

December is a weaker month for outdoor sightseeing in Chapadão do Sul.

What to pack for Chapadão do Sul in December

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

In December, Chapadão do Sul 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 Chapadão do Sul 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 Chapadão do Sul peaks around January 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 22UV 15Jun 22UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr11Extreme
May8Very high
Jun7Very high
Jul7Very high
Aug9Very high
Sep8Very high
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in Chapadão do Sul 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 Chapadão do Sul is worst in September — around 16 µg/m³ PM2.5 (moderate), about 4.1× the cleanest month (June, 4 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1816 µg/m³Jun 184 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb6Good
Mar6Good
Apr5Good
May5Good
Jun4Good
Jul5Good
Aug9Good
Sep16Moderate
Oct12Good
Nov5Good
Dec6Good
Location & terrain

Where is Chapadão do Sul?

Chapadão do Sul sits at 18.8°S, 52.6°W, 812 m above sea level, in Brazil. The nearest listed city is Costa Rica, 60 km away.

Topography around Chapadão do Sul

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

Within 3 km, the terrain around Chapadão do Sul has only modest variations in elevation — a maximum elevation change of 45 m around an average of 808 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 240 m; within 80 km, significant variations in elevation — a maximum elevation change of 517 m.

The land around Chapadão do Sul is covered by cropland (65%) and artificial surfaces (23%) within 3 km, cropland (76%) within 16 km, and cropland (49%) and grassland (28%) within 80 km.

3 km
45 m
16 km
240 m
80 km
517 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
December weather nearby: Costa Rica 60 km · Cassilândia 100 km · Mineiros 136 km · Jataí 139 km · Alto Araguaia 176 km · Paranaíba 180 km · Água Clara 186 km · Rio Verde 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 Chapadão do Sul (-18.7942°, -52.6228°, elevation 812 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).