Rio de Janeiro weather in August
August in Rio de Janeiro: warm, a little rain, with very humid — an excellent time to visit.
#6 of 12 months in Rio de Janeiro · #259 of 604 destinations to visit in August · comfort 82/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Rio de Janeiro climate normals — August
| Daytime high | 26°C / 79°F | 🌤 warm |
|---|---|---|
| Nighttime low | 18°C / 64°F | |
| Feels like (high) | 27°C / 81°F | |
| Rainfall | 67 mm / 2.6 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 16°C / 62°F | |
| Sunshine | 8.2 h/day | |
| Daylight | 11.3 h | |
| Wind | 12 km/h / 7 mph | |
| Air quality (US AQI) | 68 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Rio de Janeiro in August — FAQ
- Is August a good time to visit Rio de Janeiro?
- August in Rio de Janeiro: warm, a little rain, with very humid — an excellent time to visit. It ranks #6 of 12 months for Rio de Janeiro on SeasonMap's comfort score (82/100).
- What is the weather like in Rio de Janeiro in August?
- In August, Rio de Janeiro averages a daily high of 26°C and a low of 17.5°C, with about 67.3 mm of rain over roughly 10 rainy days.
- What is the air quality in Rio de Janeiro in August?
- Rio de Janeiro has a mean US Air Quality Index of about 68 in August.