August weather forecastRio de Janeiro, Brazil
August
Weather in August
A modest upswing in the temperature welcomes August in Rio, as the city steps further out of winter. It's an interval between the dry season and the upcoming rainy period, bringing about adequate conditions for outdoor entertainment. On average, the temperature peaks mildly at 24.3°C (75.7°F), rendering the need for a light layer in the evenings. The sea temperature continues to trend lower, giving a cooler edge to the beach experience. August thus holds a period of transition, offering varying tastes of Rio's climate to its residents and visitors.Temperature
Shifting into August, Rio de Janeiro records an average high-temperature of a still warm 24.3°C (75.7°F), presenting minor fluctuations compared to the previous month. August's nights observe an average temperature of 18.5°C (65.3°F).Humidity
August is the least humid month, with an average relative humidity of 76%.Rainfall
In Rio de Janeiro, in August, during 10.4 rainfall days, 35mm (1.38") of precipitation is typically accumulated. In Rio de Janeiro, during the entire year, the rain falls for 192.5 days and collects up to 812mm (31.97") of precipitation.Sea temperature
In Rio de Janeiro, the average seawater temperature in August is 22.3°C (72.1°F).Note: Individual cold sensitivities, influenced by sunshine, wind, and the ambient temperature, play a role in finding a swim in 22.3°C (72.1°F) water pleasant. (Olympic swimming events mandate water temperatures from 25°C (77°F) to 28°C (82.4°F).)
Daylight
The average length of the day in August is 11h and 21min.On the first day of August in Rio de Janeiro, Brazil, sunrise is at 06:26 and sunset at 17:31. On the last day of the month, sunrise is at 06:03 and sunset at 17:42 -03.
Sunshine
The average sunshine in August is 7.8h.UV index
In Rio de Janeiro, Brazil, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for average individuals.Note: A maximum high daily UV index of 6 during August translates into the following directions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Beware! Reflecting off water and sand, UV rays are much stronger.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Rio de Janeiro, Brazil
- Average high temperature in August: 24.3°C
The warmest month (with the highest average high temperature) is February (29.7°C).
The month with the lowest average high temperature is July (24°C).
- Average low temperature in August: 18.5°C
The month with the highest average low temperature is January (23.7°C).
The coldest month (with the lowest average low temperature) is August (18.5°C).
Average pressure in August
Rio de Janeiro, Brazil
- Average pressure in August: 1020.1mbar
The month with the highest atmospheric pressure is July (1020.5mbar).
The month with the lowest atmospheric pressure is December (1011.9mbar).
Average wind speed in August
Rio de Janeiro, Brazil
- Average wind speed in August: 11.3km/h
The windiest months (with the highest average wind speed) are August and September (11.3km/h).
The calmest month (with the lowest average wind speed) is March (8.7km/h).
Average humidity in August
Rio de Janeiro, Brazil
- Average humidity in August: 76%
The month with the highest relative humidity is November (82%).
The month with the lowest relative humidity is August (76%).
Average rainfall in August
Rio de Janeiro, Brazil
- Average rainfall in August: 35mm
The wettest month (with the highest rainfall) is November (119mm).
The driest month (with the least rainfall) is June (29mm).
Average rainfall days in August
Rio de Janeiro, Brazil
- Average rainfall days in August: 10.4 days
The month with the highest number of rainy days is March (22.7 days).
The month with the least rainy days is July (9.3 days).
Average sea temperature in August
Rio de Janeiro, Brazil
- Average sea temperature in August: 22.3°C
The best month for swimming (with the highest average sea temperature) is March (25.8°C).
The coldest month (with the lowest average sea temperature) is September (21.6°C).
Average daylight in August /
Average sunshine in August
Rio de Janeiro, Brazil
- Average daylight in August: 11h and 24min
The month with the longest days is December (Average daylight: 13h and 30min).
The month with the shortest days is June (Average daylight: 10h and 48min).
- Average sunshine in August: 7h and 48min
The month with the most sunshine is February (Average sunshine: 8h and 48min).
The month with the least sunshine is October (Average sunshine: 7h and 30min).
Average sunshine days in August
Rio de Janeiro, Brazil
- Average sunshine days in August: 19.3 days
The month with the most sunshine days is July (20.6 days).
The month with the least sunshine days is December (4.8 days).
Average UV index in August
Rio de Janeiro, Brazil
- Average UV index in August: 6
The month with the highest UV index is January (UV index 7).
The month with the lowest UV index is September (UV index 5).
Average cloud cover in August
Rio de Janeiro, Brazil
- Average cloud cover in August: 29
The month with the most cloud cover is November (Cloud cover 46).
The month with the least cloud cover is February (Cloud cover 28).
Average visibility in August
Rio de Janeiro, Brazil
- Average visibility in August: 10km
The months with the highest visibility are February, May, June, July, August and September (10km).
The months with the lowest visibility are January, March, April, October, November and December (9km).
