Porto Velho in Winter
In winter (June, July and August), Porto Velho sees average daytime highs around 32°C and overnight lows near 22°C, with 108 mm of rain over about 22 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 57% of the time across winter, and the air most often feels oppressive.
Winter is Porto Velho's best season of the year to visit on our travel score. For the whole year in context, see Porto Velho's year-round climate.
- Avg daytime high
- 32°C
- 2nd-warmest season
- Avg overnight low
- 22°C
- Rainfall
- 108 mm
- 22 wet days
- Avg wind
- 5 km/h
- Travel score
- 4.6
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Porto Velho 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 Porto Velho reaches about 32°C and drops to 22°C overnight. The warmest of the three months is August, the coolest July.
How winter really feels in Porto Velho
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.
Porto Velho 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° / 24° | 303 | 28.6 | 12.5 | 2.8 |
| Feb | 30° / 24° | 314 | 26.7 | 12.3 | 2.7 |
| Mar | 30° / 24° | 328 | 29.5 | 12.1 | 2.7 |
| Apr | 30° / 24° | 228 | 26.4 | 11.8 | 2.9 |
| May | 30° / 23° | 133 | 21.5 | 11.6 | 3.6 |
| Jun | 31° / 23° | 44 | 9.5 | 11.5 | 4.9 |
| Jul | 31° / 22° | 22 | 4.7 | 11.5 | 5.1 |
| Aug | 33° / 23° | 42 | 7.6 | 11.7 | 3.9 |
| Sep | 33° / 24° | 103 | 16.7 | 11.9 | 3.1 |
| Oct | 32° / 24° | 178 | 23.3 | 12.2 | 2.7 |
| Nov | 31° / 24° | 246 | 26.3 | 12.4 | 2.7 |
| Dec | 30° / 24° | 298 | 28.7 | 12.5 | 2.7 |
Cloud cover in Winter
The sky is clear or mostly clear about 57% of the time across winter.
Chance of precipitation in Winter
Porto Velho gets around 108 mm of rain over 22 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 5 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 5.0 kWh/m².
Hazard calendar for Porto Velho
None of Porto Velho's seasonal hazards peak in winter. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Porto Velho's rainy season runs October–April, when most of the year's rain falls.
Is winter a good time to visit Porto Velho?
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 Porto Velho for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Porto Velho in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Porto Velho sees daytime highs around 32°C and nights near 22°C. Pack light clothes. Worth having: rain gear and sun protection. About 22 days see rain.
UV index in Porto Velho in Winter
Clear-sky midday UV across winter averages around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Porto Velho peaks around January 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 11 at about 4 (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 | 15 | 13 | 10 | 9 | 9 | 5 | 4 | 11 | 13 | 14 |
| 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 | 15 | Extreme |
| Apr | 13 | Extreme |
| May | 10 | Extreme |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 5 | High |
| Sep | 4 | Moderate |
| Oct | 11 | Extreme |
| Nov | 13 | Extreme |
| Dec | 14 | Extreme |
Air quality in Porto Velho 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 Porto Velho is worst in August — around 101 µg/m³ PM2.5 (unhealthy), about 9.5× the cleanest month (May, 11 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 | 15 | 12 | 11 | 12 | 34 | 101 | 100 | 36 | 20 | 15 |
| Level | Moderate | Moderate | Moderate | Good | Good | Good | Moderate | Unhealthy | Unhealthy | Poor | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 13 | Moderate |
| Mar | 15 | Moderate |
| Apr | 12 | Good |
| May | 11 | Good |
| Jun | 12 | Good |
| Jul | 34 | Moderate |
| Aug | 101 | Unhealthy |
| Sep | 100 | Unhealthy |
| Oct | 36 | Poor |
| Nov | 20 | Moderate |
| Dec | 15 | Moderate |
Where is Porto Velho?
Porto Velho sits at 8.8°S, 63.9°W, 90 m above sea level, in Brazil. The nearest listed city is Candeias do Jamari, 23 km away.
Topography around Porto Velho
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Porto Velho.
Within 3 km, the terrain around Porto Velho has only modest variations in elevation — a maximum elevation change of 47 m around an average of 76 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 130 m; within 80 km, significant variations in elevation — a maximum elevation change of 342 m.
The land around Porto Velho is covered by artificial surfaces (54%) and trees (23%) within 3 km, trees (54%) and grassland (29%) within 16 km, and trees (75%) and grassland (20%) 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 Porto Velho (-8.7619°, -63.9039°, elevation 90 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.