Rio Branco in Winter
In winter (June, July and August), Rio Branco sees average daytime highs around 32°C and overnight lows near 20°C, with 88 mm of rain over about 17 wet days across the season. It is the 2nd-warmest season and the driest season of the year.
Over the season highs climb from about 30°C in early June to 33°C by late August. The sky is clear or mostly clear about 53% of the time across winter, and the air most often feels oppressive.
Winter is Rio Branco's best season of the year to visit on our travel score. For the whole year in context, see Rio Branco's year-round climate.
- Avg daytime high
- 32°C
- 2nd-warmest season
- Avg overnight low
- 20°C
- Rainfall
- 88 mm
- 17 wet days
- Avg wind
- 6 km/h
- Travel score
- 4.8
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Rio Branco in Winter
Over the season highs climb from about 30°C in early June to 33°C by late August.
A typical winter day in Rio Branco reaches about 32°C and drops to 20°C overnight. The warmest of the three months is August, the coolest July.
How winter really feels in Rio Branco
Once humidity and wind are folded in, winter brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in winter is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Rio Branco weather by month
How the three winter months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 30° / 23° | 255 | 27.7 | 12.5 | 2.8 |
| Feb | 30° / 23° | 240 | 25 | 12.3 | 2.8 |
| Mar | 30° / 23° | 249 | 27.2 | 12.1 | 2.8 |
| Apr | 30° / 22° | 160 | 22.8 | 11.8 | 3.2 |
| May | 30° / 21° | 76 | 15.4 | 11.5 | 4.3 |
| Jun | 30° / 20° | 30 | 6.8 | 11.4 | 5.3 |
| Jul | 31° / 20° | 21 | 4.2 | 11.5 | 5.1 |
| Aug | 33° / 20° | 38 | 6.3 | 11.7 | 4.0 |
| Sep | 33° / 22° | 76 | 11.9 | 11.9 | 3.2 |
| Oct | 33° / 23° | 137 | 19.5 | 12.2 | 2.8 |
| Nov | 31° / 23° | 199 | 22.9 | 12.5 | 2.8 |
| Dec | 30° / 23° | 246 | 26.3 | 12.6 | 2.9 |
Cloud cover in Winter
The sky is clear or mostly clear about 53% of the time across winter.
Chance of precipitation in Winter
Rio Branco gets around 88 mm of rain over 17 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 6 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 11 h 30 min in early June to 11 h 48 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 4.8 kWh/m².
Hazard calendar for Rio Branco
None of Rio Branco's seasonal hazards peak in winter. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Rio Branco's rainy season runs October–April, when most of the year's rain falls.
Is winter a good time to visit Rio Branco?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a reasonable time to visit Rio Branco for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Rio Branco in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Rio Branco sees daytime highs around 32°C and nights near 20°C. Pack light clothes. Worth having: sun protection. About 17 days see rain.
UV index in Rio Branco in Winter
Clear-sky midday UV across winter averages around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Rio Branco peaks around January 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 12 at about 5 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 15 | 15 | 14 | 13 | 11 | 9 | 8 | 7 | 4 | 12 | 13 | 13 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High | Moderate | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 15 | Extreme |
| Mar | 14 | Extreme |
| Apr | 13 | Extreme |
| May | 11 | Extreme |
| Jun | 9 | Very high |
| Jul | 8 | Very high |
| Aug | 7 | High |
| Sep | 4 | Moderate |
| Oct | 12 | Extreme |
| Nov | 13 | Extreme |
| Dec | 13 | Extreme |
Air quality in Rio Branco in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Rio Branco is worst in September — around 100 µg/m³ PM2.5 (unhealthy), about 12.4× the cleanest month (June, 8 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 13 | 13 | 13 | 10 | 8 | 8 | 14 | 65 | 100 | 27 | 13 | 11 |
| Level | Moderate | Moderate | Moderate | Good | Good | Good | Moderate | Unhealthy | Unhealthy | Moderate | Moderate | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 13 | Moderate |
| Mar | 13 | Moderate |
| Apr | 10 | Good |
| May | 8 | Good |
| Jun | 8 | Good |
| Jul | 14 | Moderate |
| Aug | 65 | Unhealthy |
| Sep | 100 | Unhealthy |
| Oct | 27 | Moderate |
| Nov | 13 | Moderate |
| Dec | 11 | Good |
Where is Rio Branco?
Rio Branco sits at 10.0°S, 67.8°W, 153 m above sea level, in Brazil. The nearest listed city is Senador Guiomard, 21 km away.
Topography around Rio Branco
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Rio Branco.
Within 3 km, the terrain around Rio Branco has only modest variations in elevation — a maximum elevation change of 50 m around an average of 142 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 103 m; within 80 km, only modest variations in elevation — a maximum elevation change of 165 m.
The land around Rio Branco is covered by artificial surfaces (54%) and trees (33%) within 3 km, trees (46%) and grassland (46%) within 16 km, and trees (61%) and grassland (38%) within 80 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
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 Rio Branco (-9.9747°, -67.81°, elevation 153 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.