Monthly climate guide
Porto Velho weather in August
Expect very hot weather in Porto Velho in August: afternoons reach about 36°C (96°F), while nights drop to around 23°C (74°F). Around 34 mm of rain falls over the month (fairly dry), and skies are a mix of sun and cloud. Daytime highs are 3°C warmer than July and about the same as September.
What stands out in August
- Nights stay warm, rarely below 23°C — air-conditioning helps.
- Rain is well below Porto Velho's usual level (around 73% less).
- It's one of the drier stretches of the year in Porto Velho.
- Only one month is warmer in Porto Velho than August.
Avg high
36°C
96°F
Avg low
23°C
74°F
Rainfall
34 mm
fairly dry
Humidity
61%
relative
Sky
37%
cloud · a mix of sun and cloud
Porto Velho weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 29°C / 83°F | 23°C / 74°F | 230 mm | 91% | 88% |
| February | 29°C / 83°F | 23°C / 74°F | 236 mm | 91% | 88% |
| March | 29°C / 83°F | 23°C / 74°F | 213 mm | 91% | 88% |
| April | 29°C / 83°F | 23°C / 74°F | 148 mm | 91% | 80% |
| May | 29°C / 84°F | 23°C / 73°F | 81 mm | 90% | 65% |
| June | 30°C / 86°F | 22°C / 72°F | 22 mm | 85% | 37% |
| July | 33°C / 91°F | 22°C / 72°F | 19 mm | 71% | 24% |
| August | 36°C / 96°F | 23°C / 74°F | 34 mm | 61% | 37% |
| September | 36°C / 97°F | 25°C / 76°F | 70 mm | 64% | 62% |
| October | 34°C / 93°F | 24°C / 76°F | 123 mm | 72% | 80% |
| November | 32°C / 90°F | 24°C / 76°F | 129 mm | 79% | 85% |
| December | 30°C / 86°F | 24°C / 75°F | 209 mm | 87% | 86% |
What to pack for August
- Light, breathable clothing (cotton or linen)
- A sun hat and high-SPF sunscreen
- A refillable water bottle
- An extra layer — evenings are noticeably cooler than afternoons
- Sunglasses
Is August a good time to visit Porto Velho?
Compare the months in the chart above to find your ideal window.
Best time to visit Porto Velho →Other Brazil cities in August
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Porto Velho weather in August. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/brazil/porto-velho/august
<a href="https://weathercompare.eu/weather/brazil/porto-velho/august">Porto Velho weather in August</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/brazil/porto-velho" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Porto Velho weather in August"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/brazil/porto-velho/august">Porto Velho weather in August</a> – WeatherCompare</p>
Porto Velho in August: quick answers
Is August a good time to visit Porto Velho?
It can be, if you like heat: August highs in Porto Velho are around 36°C. Good for the beach; plan sightseeing for early morning and evening.
How warm is Porto Velho in August?
Average highs are about 36°C (96°F) and average lows about 23°C (74°F), based on 10 years of daily data.
Does it rain a lot in Porto Velho in August?
Porto Velho typically gets around 34 mm of rain in August — fairly dry.
Figures are long-term averages for the area around Porto Velho (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.