Climate and average weather in Ouro Preto do Oeste

In Ouro Preto do Oeste, the weather is sweltering, wet, and mostly clear and remarkably steady, with daytime highs holding near sweltering levels all year. The wettest stretch peaks around January.

Best: mid May to late July

Over the course of the year, the temperature in Ouro Preto do Oeste typically varies from 20°C to 34°C, and is rarely below 17°C or above 36°C. August is the hottest month of the year, while February is the coldest.

Based on the travel score, the best time of year to visit Ouro Preto do Oeste for warm-weather activities is from mid May to late July.

Hottest
Aug
34°
Coldest
Feb
23°
Wettest
Jan
272 mm
Driest
Jul
12 mm
Rain / yr
1760 mm
217 wet days
Daylight
11.4–12.6 h
shortest–longest
Elevation
214 m
10.7°S
Clearest
Jul
28% cloud

Ouro Preto do Oeste is settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Ouro Preto do Oeste 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 mid May to late July.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

Temperatures in Ouro Preto do Oeste stay fairly even through the year, without a distinct hot or cool season. The warmest month is August, with an average high of 34°C and low of 21°C; the coolest is February, with an average low of 23°C and high of 29°C.

Days typically run about 9°C warmer than nights, with the widest day–night swing (around 12°C) in August.

15°20°25°30°35°40°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2923
Feb2923
Mar3023
Apr3022
May3022
Jun3121
Jul3220
Aug3421
Sep3323
Oct3223
Nov3123
Dec3023

How hot and cold Ouro Preto do Oeste really feels

Feels-like highFeels-like lowactual air temp

The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.

On the hottest afternoons, once humidity is folded in, Ouro Preto do Oeste feels like about 37°C (around September 25). Nearly every day a year carries some heat stress, peaking in September.

20°25°30°35°40°JanFebMarAprMayJunJulAugSepOctNovDec
Feels-like high (°C)Air high (°C)Feels-like low (°C)Air low (°C)
Jan33292323
Feb33292223
Mar33302323
Apr34302222
May33302222
Jun33312121
Jul33322020
Aug34342121
Sep36332223
Oct36322323
Nov35312323
Dec34302323

Average hourly temperature in Ouro Preto do Oeste

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 August afternoons, near 34°C, and coldest before dawn in February, near 23°C.

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

Ouro Preto do Oeste 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° / 23°27228.512.62.9
Feb29° / 23°26226.112.42.9
Mar30° / 23°2352812.12.9
Apr30° / 22°14822.911.83.4
May30° / 22°7914.811.54.5
Jun31° / 21°203.911.45.4
Jul32° / 20°122.111.44.9
Aug34° / 21°244.511.63.8
Sep33° / 23°8513.411.93.1
Oct32° / 23°14821.212.22.8
Nov31° / 23°22124.512.52.9
Dec30° / 23°25426.912.63.0

Chance of rain

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

Ouro Preto do Oeste gets about 1760 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 7.0 months, from around Sep 30 to Apr 30, peaking in February at about 94% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 17.

January is the wettest month by volume, with 272 mm over about 29 wet days; July is the driest, with 12 mm.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetFeb 9 · 94%Jul 17 · 6%
Rain on a day (%)Rain days
Jan9229
Feb9326
Mar9028
Apr7623
May4815
Jun154
Jul72
Aug165
Sep4413
Oct6821
Nov8225
Dec8727

Monthly rainfall

Over a full year, Ouro Preto do Oeste collects about 1760 mm of rain across 217 wet days — roughly 147 mm in an average month.

It doesn’t fall evenly. January is the wettest month with 272 mm, while July is the driest at just 12 mm. The three wettest months alone bring about 45% of the year’s total.

050100150200250300JanFebMarAprMayJunJulAugSepOctNovDec2722622351487920122485148221254
Rainfall (mm)Rain days
Jan27229
Feb26226
Mar23528
Apr14823
May7915
Jun204
Jul122
Aug245
Sep8513
Oct14821
Nov22125
Dec25427

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Ouro Preto do Oeste, 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 May 14 and lasts for 4.9 months, ending around October 10. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 87% of the time on average.

The cloudier part of the year begins around October 11 and lasts for 7.1 months, ending around May 13. The cloudiest month is February, when it is overcast or mostly cloudy 95% 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%JanFebMarAprMayJunJulAugSepOctNovDecJul 28 · 88%Feb 18 · 4%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan793
Feb595
Mar892
Apr1882
May4159
Jun7624
Jul8713
Aug8119
Sep6040
Oct3268
Nov1387
Dec991

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 12 h 36 min of light; the shortest, around May 26, only 11 h 24 min — a swing of roughly 1 h 12 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan12.66:016:35
Feb12.46:136:34
Mar12.16:166:21
Apr11.86:166:02
May11.56:205:50
Jun11.46:285:50
Jul11.46:325:57
Aug11.66:246:02
Sep11.96:056:01
Oct12.25:476:01
Nov12.55:396:09
Dec12.65:466:24

Sunny days

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

Ouro Preto do Oeste averages about 7 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 0 and 23 days.

The sunnier stretch runs 4.3 months, from around May 20 to Sep 26. The sunniest month is July, with roughly 23 sunny days (bright).

The greyest month is February, down near 0 sunny days — about 99% fewer than the July peak.

0510152025JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightbrilliantJul 1723 daysFeb 180 days
Sunny daysSky
Jan0Gloomy
Feb0Gloomy
Mar1Gloomy
Apr2Gloomy
May7Gloomy
Jun17Bright
Jul23Bright
Aug20Bright
Sep10Mixed
Oct4Gloomy
Nov1Gloomy
Dec1Gloomy

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 Ouro Preto do Oeste, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 9.2 months, from around September 11 to June 18. 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 June 19 to September 10, and August is the most comfortable month — the air is dry or comfortable 27% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecAug 1 · 38%Jan 1 · 0%miserableoppressivehumidmuggycomfortablehumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
Jan0000928
Feb0000928
Mar00008812
Apr01148311
May02414773
Jun141540390
Jul6203629100
Aug7202727190
Sep13927600
Oct0017912
Nov0001935
Dec0001945

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.

Wind in Ouro Preto do Oeste is steady company: average speeds sit near 6 km/hcalm — in every month of the year, with no meaningful windy or calm season.

051015JanFebMarAprMayJunJulAugSepOctNovDeccalmlight breezeJul 22 · 7 km/hMar 25 · 5 km/h
Wind speed (km/h)Feels
Jan6calm
Feb5calm
Mar5calm
Apr5calm
May6calm
Jun6calm
Jul7calm
Aug7calm
Sep6calm
Oct6calm
Nov6calm
Dec6calm

Hazard calendar for Ouro Preto do Oeste

In seasonPeak

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

Ouro Preto do Oeste's rainy season runs October–April, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Best time to visit Ouro Preto do Oeste

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around late July, Ouro Preto do Oeste is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.

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 Ouro Preto do Oeste for general outdoor tourist activities is from mid May to late July, with a peak score in the second week of June.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationJun 14 · 5.5

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
Jan2.9poor
Feb2.9poor
Mar2.9poor
Apr3.4poor
May4.5fair
Jun5.3fair
Jul4.9fair
Aug3.8fair
Sep3.1poor
Oct2.8poor
Nov2.8poor
Dec3.0poor

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 Ouro Preto do Oeste for hot-weather activities is from late May to late August, with a peak score in the second week of July.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationJul 10 · 8.1

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 Ouro Preto do Oeste, 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.

Ouro Preto do Oeste packs about the same all year — highs hold near 34°C. Across the year the things worth having are light clothes, sun protection and rain gear.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In August, Ouro Preto do Oeste sees daytime highs around 34°C and nights near 21°C. Pack light clothes. Worth having: sun protection. About 5 days see rain.

UV index (midday) in Ouro Preto do Oeste 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 Ouro Preto do Oeste peaks around January 24 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 13 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeJan 24UV 15Sep 13UV 3
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Extreme
Jun9Very high
Jul9Very high
Aug6High
Sep3Moderate
Oct11Extreme
Nov13Extreme
Dec14Extreme

Average hourly UV index in Ouro Preto do Oeste

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 8.5 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)
Jan8.57
Feb8.56.5
Mar8.56.5
Apr86
May75
Jun74.5
Jul74.5
Aug61.5
Sep30
Oct7.55.5
Nov86.5
Dec8.56.5

Air quality in Ouro Preto do Oeste 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 Ouro Preto do Oeste is worst in September — around 57 µg/m³ PM2.5 (unhealthy), about 7.3× the cleanest month (June, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodPoorModerateSep 1454 µg/m³Jun 198 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb12Good
Mar13Moderate
Apr10Good
May9Good
Jun8Good
Jul8Good
Aug39Poor
Sep57Unhealthy
Oct24Moderate
Nov17Moderate
Dec14Moderate
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Ouro Preto do Oeste 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. Ouro Preto do Oeste banks about 6,005 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around September.

02,0004,0006,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan495
Feb445
Mar497
Apr482
May486
Jun473
Jul505
Aug540
Sep538
Oct543
Nov501
Dec502

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.

Ouro Preto do Oeste receives about 5.0 kWh/m² a day of solar energy — bright — and it stays remarkably steady, holding between 4.5 and 5.8 kWh/m² all year. For solar panels, output here is a flat line, not a seasonal wave.

01234567JanFebMarAprMayJunJulAugSepOctNovDecdimmoderatebrightintenseOct 65.8 kWhMay 204.5 kWh
Solar energy (kWh/m²)Level
Jan4.8Bright
Feb4.6Bright
Mar4.7Bright
Apr4.6Bright
May4.5Bright
Jun4.7Bright
Jul5.1Bright
Aug5.5Bright
Sep5.7Bright
Oct5.8Bright
Nov5.3Bright
Dec5.0Bright

Where is Ouro Preto do Oeste?

Ouro Preto do Oeste sits at 10.7°S, 62.2°W, 214 m above sea level, in Brazil. The nearest listed city is Ji Paraná, 33 km away.

Topography around Ouro Preto do Oeste

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ouro Preto do Oeste.

Within 3 km, the terrain around Ouro Preto do Oeste has significant variations in elevation — a maximum elevation change of 275 m around an average of 229 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 303 m; within 80 km, significant variations in elevation — a maximum elevation change of 462 m.

The land around Ouro Preto do Oeste is covered by grassland (59%) and trees (40%) within 3 km, grassland (73%) and trees (25%) within 16 km, and grassland (67%) and trees (32%) within 80 km.

3 km
275 m
16 km
303 m
80 km
462 m
treesgrasslandartificial surfaces
Nearby: Ji Paraná 33 km · Jaru 44 km · Presidente Médici 59 km · Cacoal 114 km · São Miguel do Guaporé 118 km · Rolim de Moura 126 km · Ariquemes 129 km · Alta Floresta d'Oeste 139 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 Ouro Preto do Oeste (-10.7481°, -62.2158°, elevation 214 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).