Monthly climate guide
Rio Branco weather in August
August in Rio Branco is typically very hot, with average daytime highs around 33°C (91°F) and night-time lows near 21°C (70°F). The month usually brings about 44 mm of rain (fairly dry) and is 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
- It's one of the sunniest months here, with cloud cover around 44%.
- It's one of the drier months, with about 68% less rain than Rio Branco's average.
- August is Rio Branco's third warmest month.
- August sits in Rio Branco's drier season — usually a comfortable time to visit.
Avg high
33°C
91°F
Avg low
21°C
70°F
Rainfall
44 mm
fairly dry
Humidity
69%
relative
Sky
44%
cloud · a mix of sun and cloud
Rio Branco weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 28°C / 83°F | 23°C / 73°F | 254 mm | 92% | 87% |
| February | 28°C / 83°F | 23°C / 73°F | 241 mm | 93% | 88% |
| March | 28°C / 83°F | 23°C / 73°F | 242 mm | 93% | 85% |
| April | 28°C / 82°F | 23°C / 73°F | 147 mm | 92% | 73% |
| May | 28°C / 82°F | 22°C / 71°F | 80 mm | 91% | 61% |
| June | 28°C / 83°F | 21°C / 70°F | 38 mm | 88% | 45% |
| July | 30°C / 86°F | 20°C / 68°F | 20 mm | 79% | 36% |
| August | 33°C / 91°F | 21°C / 70°F | 44 mm | 69% | 44% |
| September | 34°C / 94°F | 23°C / 73°F | 78 mm | 69% | 59% |
| October | 33°C / 92°F | 24°C / 74°F | 115 mm | 73% | 79% |
| November | 31°C / 88°F | 24°C / 74°F | 189 mm | 81% | 81% |
| December | 29°C / 84°F | 23°C / 74°F | 208 mm | 90% | 83% |
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
- A small travel umbrella, just in case
Is August a good time to visit Rio Branco?
Compare the months in the chart above to find your ideal window.
Best time to visit Rio Branco →Other Brazil cities in August
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Rio Branco weather in August. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/brazil/rio-branco/august
<a href="https://weathercompare.eu/weather/brazil/rio-branco/august">Rio Branco weather in August</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/brazil/rio-branco" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Rio Branco weather in August"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/brazil/rio-branco/august">Rio Branco weather in August</a> – WeatherCompare</p>
Rio Branco in August: quick answers
Is August a good time to visit Rio Branco?
It can be, if you like heat: August highs in Rio Branco are around 33°C. Good for the beach; plan sightseeing for early morning and evening.
How warm is Rio Branco in August?
Average highs are about 33°C (91°F) and average lows about 21°C (70°F), based on 10 years of daily data.
Does it rain a lot in Rio Branco in August?
Rio Branco typically gets around 44 mm of rain in August — fairly dry.
Figures are long-term averages for the area around Rio Branco (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.