Rio de Janeiro Weather in August
August in Rio de Janeiro brings high temperatures, with daytime highs of 27°C (81°F) and nights around 18°C (64°F). Rainfall is at its lowest this month, making it one of the more reliable months to be outdoors.
Rainfall in Rio de Janeiro in August
Expect fewer clouds and less rain as the month goes on. This makes it an ideal time for outdoor activities. Rain is expected on roughly 9 days, totalling around 45 mm (1.8 in) for the month. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.
Temperature in Rio de Janeiro in August
August is a good time to be in Rio de Janeiro. Days are perfect, reaching 27°C (81°F), with nights around 18°C (64°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights drop to around 18°C (64°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Rio de Janeiro in August
The city usually sees around 182 hours of sunlight, indicating a moderately sunny period.
Wind Speed in Rio de Janeiro in August
Wind speeds average 3 m/s (6 knots) during August. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.
Average water temperature in August
With water at 21°C (70°F), conditions are good for swimming and other water activities. You won't need a wetsuit and most people find it very comfortable.If you're a fan of comfortable temperatures and drier conditions, August is a great time to visit.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Brazil, check out our Rio de Janeiro's climate page.
Rio de Janeiro Temperature in August
Min Temperature
18°C (64°F)
Max Temperature
27°C (81°F)
Water Temperature
21°C (70°F)
Chance of Rain
30%
Precipitation
45 mm (1.8 in)
Rainy days
9 days
Humidity
77%
Windspeed
3 m/s (6 knots)
Sunshine
182 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Rio de Janeiro typically stay consistent throughout August, with daily highs averaging around 27°C (81°F). Nights are pleasant, with lows around 19°C (66°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Rio de Janeiro in August
Browse day-by-day weather records for Rio de Janeiro spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Rio de Janeiro historical weather extremes in August
According to our 49 years of weather records for Rio de Janeiro, the following extremes were recorded between 1976 and 2025.
- The hottest August day on record in Rio de Janeiro reached 39°C (102°F) (August 16, 1987).
- The lowest daytime temperature in August was 16°C (61°F), recorded on August 15, 1999.
- Rio de Janeiro registered its coldest August night on August 19, 1984, with temperatures dropping to 12°C (54°F).
Best Places in Brazil in August
Find out more about the weather in Brazil and which places have the best travel conditions in this month. See all of Brazil in August →
perfect weather
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What to Wear in Rio de Janeiro in August
Warm temperatures in August make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Rain gear is recommended, you can expect wet weather on multiple days. With water temperatures around 21°C (70°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Rio de Janeiro in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Brazil, check out our Rio de Janeiro's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Rio de Janeiro climate overview or explore weather in Brazil.
