Weather on August 21 in Rio de Janeiro
Historical weather data for August 21 in Rio de Janeiro, Brazil
Avg High26°C (78°F)
Avg Low16°C (61°F)
Warmest202124°C
Coldest198118°C
Based on 29 years of data from RIO DE JANEIRO
About This Date
August 21st in Rio de Janeiro, Brazil typically brings pleasant summer weather, with average highs around 26°C and lows near 16°C. Over 29 years of records, the warmest August 21st was in 2021 (24°C average), while the coldest was 1981 (18°C) — a 12°F range across recorded history. Rain or other precipitation has occurred on about 24% of August 21st dates historically, with the wettest August 21st recording 3.4" of rain.
Planning for August 21st in Rio de Janeiro? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip (mm) |
|---|---|---|---|
| 2025 | -- | 18°C (65°F) | 0 mm |
| 2024 | -- | 21°C (69°F) | -- |
| 2023 | -- | 18°C (65°F) | -- |
| 2021 | 32°C (90°F) | 17°C (62°F) | -- |
| 2020 | 23°C (73°F) | -- | 56 mm |
| 2016 | 27°C (81°F) | -- | -- |
| 2015 | -- | 18°C (65°F) | 1 mm |
| 2014 | -- | 7°C (45°F) | -- |
| 2012 | 22°C (71°F) | 13°C (56°F) | -- |
| 2011 | -- | 12°C (54°F) | -- |
| 2010 | 25°C (77°F) | -- | -- |
| 2008 | -- | 12°C (54°F) | -- |
| 2007 | 27°C (80°F) | 13°C (55°F) | -- |
| 2006 | 27°C (81°F) | -- | 86 mm |
| 2005 | -- | 19°C (66°F) | -- |
| 2004 | -- | 17°C (63°F) | 0 mm |
| 2003 | -- | 15°C (59°F) | 0 mm |
| 2002 | 30°C (86°F) | -- | -- |
| 2001 | 29°C (84°F) | 19°C (66°F) | -- |
| 2000 | -- | 18°C (64°F) | -- |
| 1999 | -- | 13°C (55°F) | -- |
| 1986 | -- | 20°C (68°F) | 41 mm |
| 1983 | 22°C (71°F) | 17°C (62°F) | 23 mm |
| 1982 | 23°C (73°F) | 16°C (60°F) | 0 mm |
| 1981 | 20°C (68°F) | 16°C (61°F) | 10 mm |
| 1979 | -- | 19°C (66°F) | 10 mm |
| 1977 | -- | 18°C (64°F) | 0 mm |
| 1975 | -- | 18°C (64°F) | -- |
| 1974 | -- | 16°C (61°F) | 0 mm |