Climate and average weather in Rolim de Moura

In Rolim de Moura, the weather is humid, sweltering, wet, and partly cloudy and remarkably steady, with daytime highs holding near sweltering levels all year. The wettest stretch peaks around January.

Best: early May to early August

Over the course of the year, the temperature in Rolim de Moura typically varies from 20°C to 33°C, and is rarely below 17°C or above 36°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 Rolim de Moura for warm-weather activities is from early May to early August.

Hottest
Sep
33°
Coldest
Feb
22°
Wettest
Jan
252 mm
Driest
Jul
6 mm
Rain / yr
1461 mm
190 wet days
Daylight
11.3–12.7 h
shortest–longest
Elevation
254 m
11.8°S
Clearest
Jul
26% cloud

Rolim de Moura 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 early May to early August.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

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

Temperatures in Rolim de Moura stay fairly even through the year, without a distinct hot or cool season. The warmest month is September, with an average high of 33°C and low of 22°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°40°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan2922
Feb2922
Mar3022
Apr3022
May3021
Jun3120
Jul3220
Aug3321
Sep3322
Oct3323
Nov3123
Dec3022

How hot and cold Rolim de Moura 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, Rolim de Moura feels like about 37°C (around October 11). About 351 days a year carry some heat stress, peaking in October.

15°20°25°30°35°40°JanFebMarAprMayJunJulAugSepOctNovDec
Feels-like high (°C)Air high (°C)Feels-like low (°C)Air low (°C)
Jan33292222
Feb33292222
Mar33302222
Apr33302222
May33302121
Jun32312020
Jul32322020
Aug34332121
Sep36332222
Oct37332323
Nov35312323
Dec34302222

Average hourly temperature in Rolim de Moura

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 33°C, and coldest before dawn in February, near 22°C.

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

Rolim de Moura 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°25227.612.63.0
Feb29° / 22°25025.512.43.0
Mar30° / 22°21326.512.13.1
Apr30° / 22°11519.411.73.8
May30° / 21°491011.55.1
Jun31° / 20°92.311.35.6
Jul32° / 20°61.611.45.3
Aug33° / 21°163.111.64.2
Sep33° / 22°5410.111.93.3
Oct33° / 23°10317.112.33.0
Nov31° / 23°17021.712.53.1
Dec30° / 22°22325.112.73.1

Chance of rain

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

Rolim de Moura gets about 1461 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 6.3 months, from around Oct 15 to Apr 25, peaking in February at about 91% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 18.

January is the wettest month by volume, with 252 mm over about 28 wet days; July is the driest, with 6 mm.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetFeb 8 · 91%Jul 18 · 4%
Rain on a day (%)Rain days
Jan8928
Feb9026
Mar8527
Apr6519
May3210
Jun92
Jul52
Aug113
Sep3310
Oct5517
Nov7222
Dec8225

Monthly rainfall

Over a full year, Rolim de Moura collects about 1461 mm of rain across 190 wet days — roughly 122 mm in an average month.

It doesn’t fall evenly. January is the wettest month with 252 mm, while July is the driest at just 6 mm. The three wettest months alone bring about 50% of the year’s total.

050100150200250300JanFebMarAprMayJunJulAugSepOctNovDec25225021311549961654103170223
Rainfall (mm)Rain days
Jan25228
Feb25026
Mar21327
Apr11519
May4910
Jun92
Jul62
Aug163
Sep5410
Oct10317
Nov17022
Dec22325

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

In Rolim de Moura, 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 9 and lasts for 5.1 months, ending around October 11. 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 12 and lasts for 6.9 months, ending around May 8. The cloudiest month is February, when it is overcast or mostly cloudy 93% 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 31 · 88%Feb 17 · 6%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan991
Feb793
Mar1090
Apr2773
May4852
Jun7723
Jul8713
Aug8317
Sep6337
Oct3565
Nov1585
Dec1288

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 3, 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)
Jan12.65:586:35
Feb12.46:106:33
Mar12.16:146:19
Apr11.76:156:00
May11.56:205:47
Jun11.36:285:47
Jul11.46:325:54
Aug11.66:235:59
Sep11.96:036:00
Oct12.35:446:00
Nov12.55:366:09
Dec12.75:436:24

Sunny days

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

Rolim de Moura averages about 8 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 4.5 months, from around May 16 to Sep 28. 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.

051015202530JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightbrilliantJul 2623 daysFeb 210 days
Sunny daysSky
Jan1Gloomy
Feb0Gloomy
Mar1Gloomy
Apr3Gloomy
May9Mixed
Jun18Bright
Jul23Bright
Aug22Bright
Sep13Mixed
Oct5Gloomy
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 Rolim de Moura, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 9.0 months, from around September 15 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 14, and August is the most comfortable month — the air is dry or comfortable 31% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecAug 1 · 42%Jan 1 · 0%miserablemuggyoppressivehumidcomfortabledryhumidcomfortablehumid
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
Jan0000955
Feb0000937
Mar0001918
Apr0125866
May12620701
Jun162344250
Jul623402740
Aug8232927130
Sep251232490
Oct00113850
Nov0004942
Dec0001972

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 Rolim de Moura 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 11 · 5 km/h
Wind speed (km/h)Feels
Jan6calm
Feb5calm
Mar5calm
Apr5calm
May6calm
Jun6calm
Jul7calm
Aug7calm
Sep6calm
Oct6calm
Nov6calm
Dec6calm

Hazard calendar for Rolim de Moura

In seasonPeak

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

Rolim de Moura's monsoon runs November–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 Rolim de Moura

TravelBeach/poolTemperatureCloudsPrecipitation

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

Around late July, Rolim de Moura 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 Rolim de Moura for general outdoor tourist activities is from early May to early August, with a peak score in the second week of June.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationJun 10 · 5.7

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
Jun5.6good
Jul5.2fair
Aug4.2fair
Sep3.4poor
Oct3.1poor
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 Rolim de Moura for hot-weather activities is from mid May to early September, with a peak score in the second week of July.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationJul 10 · 8.3

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 Rolim de Moura, 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.

Rolim de Moura packs about the same all year — highs hold near 33°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, Rolim de Moura sees daytime highs around 33°C and nights near 22°C. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

UV index (midday) in Rolim de Moura 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 Rolim de Moura 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 Rolim de Moura

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 Rolim de Moura 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 Rolim de Moura is worst in September — around 54 µg/m³ PM2.5 (poor), about 6.7× the cleanest month (June, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateSep 1550 µg/m³Jun 238 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar12Good
Apr9Good
May8Good
Jun8Good
Jul8Good
Aug29Moderate
Sep54Poor
Oct22Moderate
Nov15Moderate
Dec13Moderate
Almanac & agriculture

Growing season

Chance of a frost-free dayFrost-free year round

Rolim de Moura 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. Rolim de Moura banks about 5,943 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)
Jan492
Feb442
Mar495
Apr477
May479
Jun465
Jul488
Aug524
Sep533
Oct545
Nov501
Dec501

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.

Rolim de Moura receives about 5.1 kWh/m² a day of solar energy — bright — and it stays remarkably steady, holding between 4.5 and 5.9 kWh/m² all year. For solar panels, output here is a flat line, not a seasonal wave.

01234567JanFebMarAprMayJunJulAugSepOctNovDecdimmoderatebrightintenseOct 85.9 kWhMay 234.5 kWh
Solar energy (kWh/m²)Level
Jan4.9Bright
Feb4.6Bright
Mar4.8Bright
Apr4.8Bright
May4.6Bright
Jun4.7Bright
Jul5.0Bright
Aug5.5Bright
Sep5.8Bright
Oct5.9Bright
Nov5.4Bright
Dec5.0Bright

Where is Rolim de Moura?

Rolim de Moura sits at 11.8°S, 61.8°W, 254 m above sea level, in Brazil. The nearest listed city is Alta Floresta d'Oeste, 25 km away.

Topography around Rolim de Moura

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

Within 3 km, the terrain around Rolim de Moura has only modest variations in elevation — a maximum elevation change of 84 m around an average of 263 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 254 m; within 80 km, significant variations in elevation — a maximum elevation change of 422 m.

The land around Rolim de Moura is covered by grassland (79%) and trees (21%) within 3 km, grassland (74%) and trees (22%) within 16 km, and grassland (65%) and trees (34%) within 80 km.

3 km
84 m
16 km
254 m
80 km
422 m
treesgrasslandcroplandartificial surfaces
Nearby: Alta Floresta d'Oeste 25 km · Cacoal 56 km · Pimenta Bueno 68 km · Presidente Médici 71 km · Espigão dOeste 92 km · São Miguel do Guaporé 100 km · Ji Paraná 103 km · Ouro Preto do Oeste 126 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 Rolim de Moura (-11.8036°, -61.8033°, elevation 254 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).