Porto Velho weather in August
In August, Porto Velho sees average daytime highs of 33°C and overnight lows near 23°C, with 42 mm of rain across 7.6 wet days and about 11.7 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.
Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 58% of the time in August, and the air most often feels oppressive.
Daylight stretches from about 11 h 36 min at the start of August to 11 h 48 min by month's end. Set against the rest of the year, August is Porto Velho's 2nd-clearest and 1st-windiest month. For the whole year in context, see Porto Velho's year-round climate.
- Daytime high
- 33°
- 1st warmest
- Overnight low
- 23°
- 3rd coldest
- Rainfall
- 42 mm
- 7.6 wet days
- Daylight
- 11 h 42 min
- 6:28 AM – 6:11 PM
- Cloud cover
- 40%
- 2nd clearest
- Wind
- 6 km/h
- 1st windiest
- Solar energy
- 5.38 kWh/m²
- Travel score
- 3.9
- out of 10
Temperature in August
Day-to-day highs hold fairly steady near 33°C through the month.
A typical August day in Porto Velho reaches about 33°C in the afternoon and slips back to 23°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 35°C. Set against its neighbours, August runs about 1°C warmer than July and on par with September.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 |
| Avg low (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 33 | 22 |
| 2 | 33 | 22 |
| 3 | 33 | 22 |
| 4 | 33 | 22 |
| 5 | 33 | 22 |
| 6 | 33 | 22 |
| 7 | 33 | 22 |
| 8 | 33 | 23 |
| 9 | 33 | 23 |
| 10 | 33 | 23 |
| 11 | 33 | 23 |
| 12 | 33 | 23 |
| 13 | 33 | 23 |
| 14 | 33 | 23 |
| 15 | 33 | 23 |
| 16 | 33 | 23 |
| 17 | 33 | 23 |
| 18 | 33 | 23 |
| 19 | 33 | 23 |
| 20 | 33 | 23 |
| 21 | 33 | 23 |
| 22 | 33 | 23 |
| 23 | 33 | 23 |
| 24 | 33 | 23 |
| 25 | 33 | 23 |
| 26 | 33 | 23 |
| 27 | 33 | 23 |
| 28 | 33 | 23 |
| 29 | 33 | 23 |
| 30 | 33 | 23 |
| 31 | 33 | 23 |
How August really feels in Porto Velho
Once humidity and wind are folded in, August averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Porto Velho weather by month
How August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.
| 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 August
The sky is clear or mostly clear about 58% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 23%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 84 | 84 | 84 | 83 | 82 | 81 | 81 | 80 | 79 | 78 | 78 | 77 | 77 | 76 | 77 | 77 | 77 | 76 | 76 | 76 | 77 | 75 | 75 | 74 | 73 | 72 | 71 | 70 | 69 | 68 | 66 |
| Cloudier (%) | 16 | 16 | 16 | 17 | 18 | 19 | 19 | 20 | 21 | 22 | 22 | 23 | 23 | 24 | 23 | 23 | 23 | 24 | 24 | 24 | 23 | 25 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 34 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 84 | 16 |
| 2 | 84 | 16 |
| 3 | 84 | 16 |
| 4 | 83 | 17 |
| 5 | 82 | 18 |
| 6 | 81 | 19 |
| 7 | 81 | 19 |
| 8 | 80 | 20 |
| 9 | 79 | 21 |
| 10 | 78 | 22 |
| 11 | 78 | 22 |
| 12 | 77 | 23 |
| 13 | 77 | 23 |
| 14 | 76 | 24 |
| 15 | 77 | 23 |
| 16 | 77 | 23 |
| 17 | 77 | 23 |
| 18 | 76 | 24 |
| 19 | 76 | 24 |
| 20 | 76 | 24 |
| 21 | 77 | 23 |
| 22 | 75 | 25 |
| 23 | 75 | 25 |
| 24 | 74 | 26 |
| 25 | 73 | 27 |
| 26 | 72 | 28 |
| 27 | 71 | 29 |
| 28 | 70 | 30 |
| 29 | 69 | 31 |
| 30 | 68 | 32 |
| 31 | 66 | 34 |
Chance of precipitation in August
Porto Velho gets around 42 mm of rain over 7.6 wet days in August. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 25% and peaks near 44% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 12 | 13 | 13 | 13 | 14 | 15 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 30 | 31 | 33 | 34 | 36 | 37 | 39 | 40 | 42 | 43 | 44 |
| Rain chance (%) | |
|---|---|
| 1 | 12 |
| 2 | 13 |
| 3 | 13 |
| 4 | 13 |
| 5 | 14 |
| 6 | 15 |
| 7 | 15 |
| 8 | 16 |
| 9 | 17 |
| 10 | 18 |
| 11 | 19 |
| 12 | 20 |
| 13 | 21 |
| 14 | 22 |
| 15 | 23 |
| 16 | 24 |
| 17 | 25 |
| 18 | 26 |
| 19 | 27 |
| 20 | 28 |
| 21 | 30 |
| 22 | 31 |
| 23 | 33 |
| 24 | 34 |
| 25 | 36 |
| 26 | 37 |
| 27 | 39 |
| 28 | 40 |
| 29 | 42 |
| 30 | 43 |
| 31 | 44 |
Humidity in August
Most of August feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the oppressive band about 53% of days. Sticky, muggy-or-worse air turns up on roughly 88% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Comfortable (%) | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Humid (%) | 11 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 7 | 7 | 6 | 5 | 5 | 5 |
| Muggy (%) | 33 | 34 | 34 | 34 | 34 | 33 | 33 | 32 | 31 | 30 | 29 | 28 | 27 | 27 | 26 | 25 | 24 | 23 | 22 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 13 | 12 | 11 | 10 |
| Oppressive (%) | 49 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 49 | 49 | 50 | 50 | 51 | 50 | 51 | 51 | 52 | 52 | 53 | 55 | 55 | 55 | 57 | 58 | 59 | 60 | 60 | 60 | 62 | 62 | 62 |
| Miserable (%) | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 10 | 10 | 11 | 12 | 12 | 13 | 14 | 14 | 15 | 16 | 17 | 18 | 19 | 19 | 20 | 21 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 1 | 2 | 11 | 33 | 49 | 5 |
| 2 | 1 | 2 | 10 | 34 | 48 | 5 |
| 3 | 1 | 2 | 10 | 34 | 48 | 5 |
| 4 | 1 | 2 | 10 | 34 | 48 | 5 |
| 5 | 1 | 2 | 10 | 34 | 48 | 5 |
| 6 | 1 | 3 | 10 | 33 | 48 | 6 |
| 7 | 1 | 3 | 9 | 33 | 48 | 6 |
| 8 | 1 | 3 | 9 | 32 | 48 | 6 |
| 9 | 1 | 3 | 9 | 31 | 49 | 7 |
| 10 | 1 | 3 | 9 | 30 | 49 | 7 |
| 11 | 1 | 3 | 9 | 29 | 50 | 8 |
| 12 | 1 | 3 | 10 | 28 | 50 | 8 |
| 13 | 1 | 3 | 10 | 27 | 51 | 8 |
| 14 | 1 | 3 | 10 | 27 | 50 | 9 |
| 15 | 1 | 3 | 10 | 26 | 51 | 9 |
| 16 | 1 | 3 | 10 | 25 | 51 | 10 |
| 17 | 1 | 3 | 10 | 24 | 52 | 10 |
| 18 | 1 | 3 | 10 | 23 | 52 | 11 |
| 19 | 1 | 3 | 10 | 22 | 53 | 12 |
| 20 | 1 | 3 | 9 | 20 | 55 | 12 |
| 21 | 1 | 3 | 9 | 19 | 55 | 13 |
| 22 | 1 | 3 | 9 | 18 | 55 | 14 |
| 23 | 1 | 3 | 8 | 17 | 57 | 14 |
| 24 | 1 | 2 | 8 | 16 | 58 | 15 |
| 25 | 0 | 2 | 8 | 15 | 59 | 16 |
| 26 | 0 | 2 | 7 | 14 | 60 | 17 |
| 27 | 0 | 2 | 7 | 13 | 60 | 18 |
| 28 | 0 | 2 | 6 | 13 | 60 | 19 |
| 29 | 0 | 2 | 5 | 12 | 62 | 19 |
| 30 | 0 | 2 | 5 | 11 | 62 | 20 |
| 31 | 0 | 2 | 5 | 10 | 62 | 21 |
Wind in August
Winds average 6 km/h in August, the windiest month of the year.
Across August, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 6 | calm |
| 2 | 6 | calm |
| 3 | 6 | calm |
| 4 | 6 | calm |
| 5 | 6 | calm |
| 6 | 6 | calm |
| 7 | 6 | calm |
| 8 | 6 | calm |
| 9 | 6 | calm |
| 10 | 6 | calm |
| 11 | 6 | calm |
| 12 | 6 | calm |
| 13 | 6 | calm |
| 14 | 6 | calm |
| 15 | 6 | calm |
| 16 | 6 | calm |
| 17 | 6 | calm |
| 18 | 6 | calm |
| 19 | 6 | calm |
| 20 | 6 | calm |
| 21 | 6 | calm |
| 22 | 6 | calm |
| 23 | 6 | calm |
| 24 | 6 | calm |
| 25 | 6 | calm |
| 26 | 6 | calm |
| 27 | 6 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
| 31 | 5 | calm |
Sunrise & sunset in August
Daylight runs from about 11 h 36 min at the start of August to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 12 minutes over August. Sunrise moves from 6:33 AM to 6:21 AM, and sunset from 6:10 PM to 6:10 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.6 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 |
| Sunrise (AM) | 6:33 | 6:33 | 6:33 | 6:33 | 6:32 | 6:32 | 6:32 | 6:31 | 6:31 | 6:31 | 6:30 | 6:30 | 6:30 | 6:29 | 6:29 | 6:28 | 6:28 | 6:28 | 6:27 | 6:27 | 6:26 | 6:26 | 6:25 | 6:25 | 6:24 | 6:24 | 6:23 | 6:23 | 6:22 | 6:22 | 6:21 |
| Sunset (PM) | 6:10 | 6:10 | 6:10 | 6:10 | 6:10 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:11 | 6:10 | 6:10 | 6:10 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.6 | 6:33 | 6:10 |
| 2 | 11.6 | 6:33 | 6:10 |
| 3 | 11.6 | 6:33 | 6:10 |
| 4 | 11.6 | 6:33 | 6:10 |
| 5 | 11.6 | 6:32 | 6:10 |
| 6 | 11.6 | 6:32 | 6:11 |
| 7 | 11.6 | 6:32 | 6:11 |
| 8 | 11.7 | 6:31 | 6:11 |
| 9 | 11.7 | 6:31 | 6:11 |
| 10 | 11.7 | 6:31 | 6:11 |
| 11 | 11.7 | 6:30 | 6:11 |
| 12 | 11.7 | 6:30 | 6:11 |
| 13 | 11.7 | 6:30 | 6:11 |
| 14 | 11.7 | 6:29 | 6:11 |
| 15 | 11.7 | 6:29 | 6:11 |
| 16 | 11.7 | 6:28 | 6:11 |
| 17 | 11.7 | 6:28 | 6:11 |
| 18 | 11.7 | 6:28 | 6:11 |
| 19 | 11.7 | 6:27 | 6:11 |
| 20 | 11.7 | 6:27 | 6:11 |
| 21 | 11.7 | 6:26 | 6:11 |
| 22 | 11.8 | 6:26 | 6:11 |
| 23 | 11.8 | 6:25 | 6:11 |
| 24 | 11.8 | 6:25 | 6:11 |
| 25 | 11.8 | 6:24 | 6:11 |
| 26 | 11.8 | 6:24 | 6:11 |
| 27 | 11.8 | 6:23 | 6:11 |
| 28 | 11.8 | 6:23 | 6:11 |
| 29 | 11.8 | 6:22 | 6:10 |
| 30 | 11.8 | 6:22 | 6:10 |
| 31 | 11.8 | 6:21 | 6:10 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 5.38 kWh/m².
For context, solar energy here swings from a low near 4.21 kWh/m² to a high of 5.52 kWh/m² in September across the year — August's 5.38 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.3 | Bright |
| 2 | 5.3 | Bright |
| 3 | 5.3 | Bright |
| 4 | 5.3 | Bright |
| 5 | 5.3 | Bright |
| 6 | 5.3 | Bright |
| 7 | 5.3 | Bright |
| 8 | 5.4 | Bright |
| 9 | 5.4 | Bright |
| 10 | 5.4 | Bright |
| 11 | 5.4 | Bright |
| 12 | 5.4 | Bright |
| 13 | 5.4 | Bright |
| 14 | 5.4 | Bright |
| 15 | 5.4 | Bright |
| 16 | 5.4 | Bright |
| 17 | 5.4 | Bright |
| 18 | 5.4 | Bright |
| 19 | 5.4 | Bright |
| 20 | 5.4 | Bright |
| 21 | 5.4 | Bright |
| 22 | 5.4 | Bright |
| 23 | 5.4 | Bright |
| 24 | 5.4 | Bright |
| 25 | 5.4 | Bright |
| 26 | 5.4 | Bright |
| 27 | 5.4 | Bright |
| 28 | 5.4 | Bright |
| 29 | 5.4 | Bright |
| 30 | 5.4 | Bright |
| 31 | 5.4 | Bright |
Hazard calendar for Porto Velho
None of Porto Velho's seasonal hazards are active in August. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Porto Velho's rainy season runs October–April, when most of the year's rain falls.
Is August a good time to visit Porto Velho?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is a weaker month for outdoor sightseeing in Porto Velho. The water and warmth also suit a beach or pool day.
What to pack for Porto Velho in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Porto Velho sees daytime highs around 33°C and nights near 23°C. Pack light clothes. Worth having: sun protection. About 8 days see rain.
UV index in Porto Velho in August
Clear-sky midday UV in August peaks around 5 — 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 August
Average fine-particle pollution (PM2.5) through the year — so you can see where August 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. 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).