Rio de Janeiro Weather in August
Brazil · Tropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
August in Rio de Janeiro sees average temperatures ranging from a low of 18.2°C (64.8°F) to a high of 25.2°C (77.4°F), with a mean of 21.3°C (70.3°F). Compared to the annual average of 23.6°C (74.5°F), this month is 2.3°C cooler than the yearly norm. Precipitation averages 74.0mm, making it approximately 22.0mm drier than the monthly average of 96.0mm. The city receives an average of 9.3 hours of sunshine per day during August, with relative humidity averaging 77.9%. Wind speeds reach an average maximum of 17.8 km/h. For travelers, this month offers a temperature experience in Rio de Janeiro, with drier-than-average conditions compared to the rest of the year.
Rio doesn't have seasons the way Northern Hemisphere cities do — it has rhythms. I spent Carnival there once and the energy is indescribable, but the heat and crowds aren't for everyone. The data shows March-May as the sweet spot: still warm, less humid, fewer tourists. What the numbers can't capture is the late afternoon light on Ipanema — that's when Rio feels most itself. December-February is festive but exhausting; pace yourself.
August vs Adjacent Months
| Metric | July | August | September |
|---|---|---|---|
| Mean Temp | 21.1°C (70.0°F) | 21.3°C (70.3°F) | 22.9°C (73.2°F) |
| Rainfall | 42.1mm | 74.0mm | 70.0mm |
| Sunshine | 9.1 hrs | 9.3 hrs | 10.0 hrs |
| Humidity | 78.3% | 77.9% | 79.1% |
| Wind | 15.9 km/h | 17.8 km/h | 18.8 km/h |
| Rainy Days | 9.6 | 11.2 | 12.4 |
Seasonal Context
August falls in Summer in the Northern Hemisphere. Summer brings the warmest conditions of the year with the longest daylight hours. For travelers visiting Rio de Janeiro in August, the data indicates favorable conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Rio de Janeiro in August?
The average temperature in Rio de Janeiro during August ranges from 18.2°C (64.8°F) to 25.2°C (77.4°F), with a mean of 21.3°C (70.3°F).
How much does it rain in Rio de Janeiro in August?
Rio de Janeiro receives an average of 74.0mm of precipitation in August, spread across approximately 11.2 rainy days.
What should I pack for Rio de Janeiro in August?
Based on August weather data, pack layers including light jackets and t-shirts, plus an umbrella.
Is August a good time to visit Rio de Janeiro?
August is a good time to visit Rio de Janeiro, with comfortable temperatures and manageable rainfall.
Other Months for Rio de Janeiro
Cities with Similar August Climate (Tropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: -22.91°, -43.17°. Timezone: America/Sao_Paulo. Last updated: 2026-07-30.