Monthly climate guide
Rio de Janeiro weather in August
August in Rio de Janeiro is typically warm, with average daytime highs around 25°C (77°F) and night-time lows near 18°C (65°F). The month usually brings about 47 mm of rain (fairly dry) and is a mix of sun and cloud. Daytime highs are about the same as July and about the same as September.
What stands out in August
- Just 40 km apart, but Rio de Janeiro runs about 2°C cooler than Petrópolis this month.
- Humidity near 77% makes 25°C feel stickier than it sounds.
- Rain is well below Rio de Janeiro's usual level (around 64% less).
- It's one of the drier stretches of the year in Rio de Janeiro.
Avg high
25°C
77°F
Avg low
18°C
65°F
Rainfall
47 mm
fairly dry
Humidity
77%
relative
Sky
46%
cloud · a mix of sun and cloud
Rio de Janeiro weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 29°C / 84°F | 24°C / 75°F | 215 mm | 82% | 65% |
| February | 29°C / 84°F | 24°C / 75°F | 180 mm | 82% | 62% |
| March | 28°C / 82°F | 23°C / 74°F | 197 mm | 83% | 71% |
| April | 27°C / 80°F | 22°C / 72°F | 106 mm | 82% | 57% |
| May | 25°C / 77°F | 20°C / 68°F | 73 mm | 81% | 58% |
| June | 25°C / 76°F | 19°C / 67°F | 56 mm | 81% | 53% |
| July | 24°C / 76°F | 18°C / 65°F | 30 mm | 78% | 45% |
| August | 25°C / 77°F | 18°C / 65°F | 47 mm | 77% | 46% |
| September | 26°C / 79°F | 19°C / 67°F | 73 mm | 77% | 53% |
| October | 27°C / 80°F | 21°C / 69°F | 99 mm | 79% | 69% |
| November | 26°C / 79°F | 21°C / 70°F | 261 mm | 83% | 78% |
| December | 28°C / 82°F | 23°C / 73°F | 235 mm | 83% | 71% |
What to pack for August
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- A small travel umbrella, just in case
- Quick-dry fabrics — it feels stickier than the temperature suggests
Is August a good time to visit Rio de Janeiro?
Our Rio de Janeiro guide recommends: April to June or September to October, avoiding the peak heat and crowds of the December–February summer.
Stick to well-touristed areas and take standard city precautions with valuables — like any major city, it pays to be aware of your surroundings.
Best time to visit Rio de Janeiro →Other Brazil cities in August
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Rio de Janeiro weather in August. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/brazil/rio-de-janeiro/august
<a href="https://weathercompare.eu/weather/brazil/rio-de-janeiro/august">Rio de Janeiro weather in August</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/brazil/rio-de-janeiro" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Rio de Janeiro weather in August"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/brazil/rio-de-janeiro/august">Rio de Janeiro weather in August</a> – WeatherCompare</p>
Rio de Janeiro in August: quick answers
Is August a good time to visit Rio de Janeiro?
Yes. August is one of the best months for Rio de Janeiro, with highs around 25°C and about 47 mm of rain.
How warm is Rio de Janeiro in August?
Average highs are about 25°C (77°F) and average lows about 18°C (65°F), based on 10 years of daily data.
Does it rain a lot in Rio de Janeiro in August?
Rio de Janeiro typically gets around 47 mm of rain in August — fairly dry.
When is the best time to visit Rio de Janeiro?
April to June or September to October, avoiding the peak heat and crowds of the December–February summer.
Figures are long-term averages for the area around Rio de Janeiro (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.