Climate and average weather in Alta Floresta d'Oeste

In Alta Floresta d'Oeste, the weather is humid, hot, wet, and partly cloudy and remarkably steady, with daytime highs holding near hot levels all year. The wettest stretch peaks around January.

Best: mid May to mid August

Over the course of the year, the temperature in Alta Floresta d'Oeste typically varies from 19°C to 32°C, and is rarely below 15°C or above 35°C. September is the hottest month of the year, while February is the coldest.

Based on the travel score, the best time of year to visit Alta Floresta d'Oeste for warm-weather activities is from mid May to mid August.

Hottest
Sep
32°
Coldest
Feb
22°
Wettest
Jan
300 mm
Driest
Jul
12 mm
Rain / yr
1894 mm
217 wet days
Daylight
11.3–12.7 h
shortest–longest
Elevation
350 m
12.0°S
Clearest
Jul
30% cloud

Alta Floresta d'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 mid August.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

Temperatures in Alta Floresta d'Oeste stay fairly even through the year, without a distinct hot or cool season. The warmest month is September, with an average high of 32°C and low of 21°C; the coolest is February, with an average low of 22°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°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2922
Feb2922
Mar2922
Apr2921
May2920
Jun3020
Jul3119
Aug3220
Sep3221
Oct3122
Nov3022
Dec2922

How hot and cold Alta Floresta d'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, Alta Floresta d'Oeste feels like about 35°C (around October 10). About 220 days a year carry some heat stress, peaking in October.

15°20°25°30°35°JanFebMarAprMayJunJulAugSepOctNovDec
Feels-like high (°C)Air high (°C)Feels-like low (°C)Air low (°C)
Jan32292222
Feb32292222
Mar32292222
Apr32292121
May31292020
Jun31302020
Jul31311919
Aug32322020
Sep34322121
Oct35312222
Nov33302222
Dec32292222

Average hourly temperature in Alta Floresta d'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 September afternoons, near 32°C, and coldest before dawn in February, near 22°C.

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

Alta Floresta d'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° / 22°30028.712.63.0
Feb29° / 22°28826.312.43.0
Mar29° / 22°28028.512.13.1
Apr29° / 21°15021.911.73.8
May29° / 20°6913.311.55.1
Jun30° / 20°183.811.36.2
Jul31° / 19°122.611.45.9
Aug32° / 20°274.911.64.8
Sep32° / 21°8112.811.93.7
Oct31° / 22°16321.612.33.2
Nov30° / 22°2332512.63.1
Dec29° / 22°27327.612.73.1

Chance of rain

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

Alta Floresta d'Oeste gets about 1894 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 6.8 months, from around Oct 3 to Apr 27, peaking in February at about 94% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 20.

January is the wettest month by volume, with 300 mm over about 29 wet days; July is the driest, with 12 mm.

0%10%20%30%40%50%60%70%80%90%100%110%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetFeb 12 · 94%Jul 20 · 7%
Rain on a day (%)Rain days
Jan9229
Feb9426
Mar9129
Apr7322
May4313
Jun144
Jul83
Aug175
Sep4313
Oct6922
Nov8325
Dec8928

Monthly rainfall

Over a full year, Alta Floresta d'Oeste collects about 1894 mm of rain across 217 wet days — roughly 158 mm in an average month.

It doesn’t fall evenly. January is the wettest month with 300 mm, while July is the driest at just 12 mm. The three wettest months alone bring about 46% of the year’s total.

050100150200250300350JanFebMarAprMayJunJulAugSepOctNovDec3002882801506918122781163233273
Rainfall (mm)Rain days
Jan30029
Feb28826
Mar28029
Apr15022
May6913
Jun184
Jul123
Aug275
Sep8113
Oct16322
Nov23325
Dec27328

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Alta Floresta d'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 8 and lasts for 5.1 months, ending around October 8. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 85% of the time on average.

The cloudier part of the year begins around October 9 and lasts for 6.9 months, ending around May 7. The cloudiest month is February, when it is overcast or mostly cloudy 94% 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 12 · 86%Feb 18 · 5%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan793
Feb694
Mar892
Apr2476
May4555
Jun7525
Jul8515
Aug8020
Sep6040
Oct3070
Nov1288
Dec1090

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 42 min of light; the shortest, around June 1, only 11 h 18 min — a swing of roughly 1 h 24 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan12.65:586:36
Feb12.46:116:34
Mar12.16:156:20
Apr11.76:166:00
May11.56:215:48
Jun11.36:295:47
Jul11.46:335:54
Aug11.66:246:00
Sep11.96:046:00
Oct12.35:456:01
Nov12.65:366:10
Dec12.75:436:25

Sunny days

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

Alta Floresta d'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 18 to Sep 25. The sunniest month is July, with roughly 22 sunny days (bright).

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

0510152025JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightbrilliantJul 2223 daysFeb 220 days
Sunny daysSky
Jan0Gloomy
Feb0Gloomy
Mar1Gloomy
Apr2Gloomy
May8Gloomy
Jun17Bright
Jul22Bright
Aug20Bright
Sep11Mixed
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 Alta Floresta d'Oeste, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 9.1 months, from around September 13 to June 16. 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 17 to September 12, and July is the most comfortable month — the air is dry or comfortable 35% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 31 · 46%Jan 1 · 0%muggyoppressivehumidcomfortabledryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
Jan0001980
Feb0002971
Mar0001981
Apr1038881
May22824640
Jun182744200
Jul926362730
Aug10252728100
Sep251237430
Oct00215820
Nov0005950
Dec0011980

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 Alta Floresta d'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 26 · 7 km/hMar 12 · 5 km/h
Wind speed (km/h)Feels
Jan6calm
Feb6calm
Mar5calm
Apr5calm
May6calm
Jun7calm
Jul7calm
Aug7calm
Sep6calm
Oct6calm
Nov6calm
Dec6calm

Hazard calendar for Alta Floresta d'Oeste

In seasonPeak

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

Alta Floresta d'Oeste's monsoon runs October–April, 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 Alta Floresta d'Oeste

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Alta Floresta d'Oeste throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around early August, Alta Floresta d'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 Alta Floresta d'Oeste for general outdoor tourist activities is from mid May to mid August, with a peak score in the third week of June.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationJun 15 · 6.2

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
Jan3.0poor
Feb3.0poor
Mar3.1poor
Apr3.8fair
May5.1fair
Jun6.1good
Jul5.9good
Aug4.8fair
Sep3.7fair
Oct3.2poor
Nov3.1poor
Dec3.1poor

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 Alta Floresta d'Oeste for hot-weather activities is from late May to early September, with a peak score in the third week of July.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationJul 15 · 8.5

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 Alta Floresta d'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.

Alta Floresta d'Oeste packs about the same all year — highs hold near 32°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, Alta Floresta d'Oeste sees daytime highs around 32°C and nights near 21°C. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

UV index (midday) in Alta Floresta d'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 Alta Floresta d'Oeste peaks around January 23 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 15 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeJan 23UV 16Sep 15UV 4
UV index (midday)Level
Jan16Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Very high
Jun9Very high
Jul8Very high
Aug9Very high
Sep3Moderate
Oct11Extreme
Nov14Extreme
Dec14Extreme

Average hourly UV index in Alta Floresta d'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 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
Feb8.57
Mar8.56.5
Apr7.56
May75
Jun6.54
Jul6.54
Aug6.54
Sep40
Oct7.55.5
Nov8.56.5
Dec8.56.5

Air quality in Alta Floresta d'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 Alta Floresta d'Oeste is worst in September — around 53 µg/m³ PM2.5 (poor), about 6.9× the cleanest month (June, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateSep 1450 µg/m³Jun 178 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb12Good
Mar12Good
Apr9Good
May8Good
Jun8Good
Jul8Good
Aug34Moderate
Sep53Poor
Oct23Moderate
Nov15Moderate
Dec13Moderate
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Alta Floresta d'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. Alta Floresta d'Oeste banks about 5,639 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)
Jan474
Feb424
Mar475
Apr457
May453
Jun436
Jul457
Aug496
Sep501
Oct512
Nov475
Dec480

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.

Alta Floresta d'Oeste receives about 5.0 kWh/m² a day of solar energy — bright — and it stays remarkably steady, holding between 4.4 and 5.8 kWh/m² all year. For solar panels, output here is a flat line, not a seasonal wave.

01234567JanFebMarAprMayJunJulAugSepOctNovDecdimmoderatebrightintenseOct 85.8 kWhMay 234.4 kWh
Solar energy (kWh/m²)Level
Jan4.8Bright
Feb4.6Bright
Mar4.7Bright
Apr4.7Bright
May4.5Bright
Jun4.6Bright
Jul5.0Bright
Aug5.4Bright
Sep5.7Bright
Oct5.8Bright
Nov5.3Bright
Dec5.0Bright

Where is Alta Floresta d'Oeste?

Alta Floresta d'Oeste sits at 12.0°S, 62.0°W, 350 m above sea level, in Brazil. The nearest listed city is Rolim de Moura, 25 km away.

Topography around Alta Floresta d'Oeste

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Alta Floresta d'Oeste.

Within 3 km, the terrain around Alta Floresta d'Oeste has only modest variations in elevation — a maximum elevation change of 160 m around an average of 368 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 249 m; within 80 km, significant variations in elevation — a maximum elevation change of 396 m.

The land around Alta Floresta d'Oeste is covered by grassland (71%) and trees (26%) within 3 km, grassland (72%) and trees (26%) within 16 km, and grassland (55%) and trees (43%) within 80 km.

3 km
160 m
16 km
249 m
80 km
396 m
treesgrasslandcroplandartificial surfaceswater
Nearby: Rolim de Moura 25 km · Cacoal 81 km · São Miguel do Guaporé 88 km · Presidente Médici 88 km · Pimenta Bueno 89 km · Espigão dOeste 114 km · Ji Paraná 120 km · Rolim de Moura do Guaporé 129 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 Alta Floresta d'Oeste (-11.9681°, -61.9542°, elevation 350 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).