Climate and average weather in Chapadão do Sul

In Chapadão do Sul, the weather is hot, wet, and mostly clear and remarkably steady, with daytime highs holding near hot levels all year. The wettest stretch peaks around January.

Best: late April to mid August

Over the course of the year, the temperature in Chapadão do Sul typically varies from 16°C to 31°C, and is rarely below 11°C or above 35°C. September is the hottest month of the year, while June is the coldest.

Based on the travel score, the best time of year to visit Chapadão do Sul for warm-weather activities is from late April to mid August.

Hottest
Sep
31°
Coldest
Jun
16°
Wettest
Jan
285 mm
Driest
Jul
10 mm
Rain / yr
1710 mm
177 wet days
Daylight
10.9–13.1 h
shortest–longest
Elevation
812 m
18.8°S
Clearest
Jul
32% cloud

Chapadão do Sul weather by month, at a glance

The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.

Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around late April to mid August.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Chapadão do Sul, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

Temperatures in Chapadão do Sul stay fairly even through the year, without a distinct hot or cool season. The warmest month is September, with an average high of 31°C and low of 19°C; the coolest is June, with an average low of 16°C and high of 27°C.

Days typically run about 10°C warmer than nights, with the widest day–night swing (around 12°C) in August.

10°15°20°25°30°35°40°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2921
Feb2921
Mar2920
Apr2919
May2717
Jun2716
Jul2716
Aug3017
Sep3119
Oct3020
Nov2920
Dec2921

Average hourly temperature in Chapadão do Sul

A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on September afternoons, near 31°C, and coldest before dawn in June, near 16°C.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM

Chapadão do Sul weather by month

Every month at a glance. Click a month for its detailed page.

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

Chance of rain

How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.

Chapadão do Sul gets about 1710 mm of precipitation a year. On a typical day the chance of rain is very wet, but that rises and falls sharply with the seasons.

The wetter season lasts 6.4 months, from around Sep 29 to Apr 12, peaking in December at about 86% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 7.

January is the wettest month by volume, with 285 mm over about 26 wet days; July is the driest, with 10 mm.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetDec 28 · 86%Jul 7 · 5%
Rain on a day (%)Rain days
Jan8326
Feb8223
Mar7624
Apr4313
May206
Jun82
Jul52
Aug103
Sep3210
Oct6220
Nov7723
Dec8426

Monthly rainfall

Over a full year, Chapadão do Sul collects about 1710 mm of rain across 177 wet days — roughly 142 mm in an average month.

It doesn’t fall evenly. January is the wettest month with 285 mm, while July is the driest at just 10 mm. The three wettest months alone bring about 47% of the year’s total.

050100150200250300350JanFebMarAprMayJunJulAugSepOctNovDec285250235974615102385160230276
Rainfall (mm)Rain days
Jan28526
Feb25023
Mar23524
Apr9713
May466
Jun152
Jul102
Aug233
Sep8510
Oct16020
Nov23023
Dec27626

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

How often the daytime sky is clear, partly cloudy or overcast.

In Chapadão do Sul, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.

The clearer part of the year begins around April 4 and lasts for 5.9 months, ending around October 1. The clearest month is August, when the sky is clear, mostly clear, or partly cloudy 79% of the time on average.

The cloudier part of the year begins around October 2 and lasts for 6.0 months, ending around April 3. The cloudiest month is January, when it is overcast or mostly cloudy 80% of the time.

0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JanFebMarAprMayJunJulAugSepOctNovDecAug 16 · 81%Jan 7 · 17%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan2080
Feb2674
Mar3961
Apr5842
May6436
Jun7327
Jul7822
Aug7921
Sep6535
Oct4159
Nov2971
Dec2278

Daylight, sunrise and sunset

DaylightNight

Hours of daylight through the year, with sunrise and sunset times.

The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around January 1, brings about 13 h 06 min of light; the shortest, around June 2, only 10 h 54 min — a swing of roughly 2 h 12 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan13.06:097:10
Feb12.66:267:04
Mar12.16:366:44
Apr11.66:446:18
May11.16:536:00
Jun10.97:045:57
Jul11.07:076:05
Aug11.46:546:15
Sep11.96:286:22
Oct12.46:026:29
Nov12.95:496:43
Dec13.15:537:00

Sunny days

How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.

Chapadão do Sul averages about 10 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 2 and 20 days.

The sunnier stretch runs 5.6 months, from around Apr 11 to Sep 28. The sunniest month is August, with roughly 20 sunny days (bright).

The greyest month is January, down near 2 sunny days — about 88% fewer than the August peak.

0510152025JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightbrilliantAug 1520 daysJan 42 days
Sunny daysSky
Jan2Gloomy
Feb3Gloomy
Mar6Gloomy
Apr11Mixed
May15Mixed
Jun17Bright
Jul20Bright
Aug20Bright
Sep14Mixed
Oct7Gloomy
Nov4Gloomy
Dec3Gloomy

Humidity comfort

DryComfortableHumidMuggyOppressiveMiserable

Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.

Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.

In Chapadão do Sul, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 7.0 months, from around September 30 to April 30. The muggiest month is January, when the air feels humid, muggy or worse about 100% of the time.

The most comfortable stretch runs from around May 1 to September 29, and July is the most comfortable month — the air is dry or comfortable 94% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 25 · 95%Jan 19 · 0%oppressivehumidcomfortablemuggydryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
Jan0058014
Feb0068212
Mar017839
Apr31026583
May153238150
Jun37412120
Jul6726600
Aug71181010
Sep362125170
Oct61124581
Nov1513765
Dec0168310

Wind

Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.

This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.

Across the year, average wind speed in Chapadão do Sul is typically calm, near 8 km/h, and varies little with the seasons.

The windier part of the year lasts 4.8 months, from around May 21 to Oct 14. The windiest month is August, averaging about 10 km/h (calm).

The calmer part of the year runs from around Oct 15 to May 20, with March the calmest month at about 7 km/h.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmerwindiercalmercalmlight breezeAug 16 · 10 km/hMar 10 · 7 km/h
Wind speed (km/h)Feels
Jan8calm
Feb7calm
Mar7calm
Apr8calm
May8calm
Jun9calm
Jul9calm
Aug10calm
Sep9calm
Oct8calm
Nov8calm
Dec8calm

Hazard calendar for Chapadão do Sul

In seasonPeak

When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.

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

Best time to visit Chapadão do Sul

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Chapadão do Sul throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around early May, Chapadão do Sul is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.

Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.

The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Chapadão do Sul for general outdoor tourist activities is from late April to mid August, with a peak score in the first week of July.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationJul 5 · 8.2

The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Travel score (0–10)Rating
Jan3.4poor
Feb3.4poor
Mar3.7fair
Apr5.3fair
May7.2good
Jun8.0ideal
Jul8.0ideal
Aug6.5good
Sep4.8fair
Oct3.7fair
Nov3.5fair
Dec3.4poor

The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Chapadão do Sul for hot-weather activities is from late April to mid September, with a peak score in the first week of August.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationAug 7 · 8.7

The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

What to pack for Chapadão do Sul, by month

EssentialRecommendedOptional

Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.

Chapadão do Sul packs about the same all year — highs hold near 31°C. Across the year the things worth having are light clothes, rain gear and sun protection.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In September, Chapadão do Sul sees daytime highs around 31°C and nights near 19°C. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

UV index (midday) in Chapadão do Sul by month

LowModerateHighVery highExtreme

Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.

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

Average hourly UV index in Chapadão do Sul

LowModerateHighVery highExtreme

Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.

The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

UV falls off far faster than brightness as the sun drops, so even in January the burn window is concentrated in the middle of the day: about 9 hours a day reach index 3 (protection recommended), and 7 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM
UV ≥ 3 (h/day)UV ≥ 6 (h/day)
Jan97
Feb97
Mar86
Apr7.55.5
May6.54
Jun63
Jul63
Aug74.5
Sep74.5
Oct85.5
Nov8.56.5
Dec97

Air quality in Chapadão do Sul by month

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly 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
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Chapadão do Sul is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDecfrost-free year round
Frost-free chance (%)Frost nights
Jan1000
Feb1000
Mar1000
Apr1000
May1000
Jun1000
Jul1000
Aug1000
Sep1000
Oct1000
Nov1000
Dec1000

Growing degree days

Degree days (base 10°C)Frost-free shaded

Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Chapadão do Sul banks about 5,054 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around October.

02,0004,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan456
Feb415
Mar456
Apr419
May370
Jun344
Jul360
Aug414
Sep450
Oct471
Nov443
Dec457

Solar energy

Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.

Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.

Chapadão do Sul receives about 5.2 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 4.1 and 5.9 kWh/m².

The brighter stretch of the year lasts 6.9 months, from around Aug 19 to Mar 17. The brightest month is October, averaging about 5.9 kWh/m² (bright).

The dimmest month is June, down near 4.2 kWh/m² — roughly 29% less than the October peak.

01234567JanFebMarAprMayJunJulAugSepOctNovDecbrighterdimmerbrighterdimmoderatebrightintenseOct 165.9 kWhJun 104.1 kWh
Solar energy (kWh/m²)Level
Jan5.5Bright
Feb5.6Bright
Mar5.3Bright
Apr5.0Bright
May4.5Bright
Jun4.1Bright
Jul4.4Bright
Aug5.1Bright
Sep5.7Bright
Oct5.9Bright
Nov5.8Bright
Dec5.7Bright

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
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).