August weather forecast
Rio de Janeiro, Brazil

Christ the Redeemer statue atop Mount Corcovado, overlooking the seaside city of Rio de Janeiro, Brazil
Christ the Redeemer statue atop Mount Corcovado, overlooking the seaside city of Rio de Janeiro, Brazil

Weather in August

The last month of the winter, August, is another warm month in Rio de Janeiro, Brazil, with an average temperature ranging between max 24.3°C (75.7°F) and min 18.5°C (65.3°F).

Temperature

In August, the average high-temperature is essentially the same as in July - a still moderately hot 24.3°C (75.7°F). In Rio de Janeiro, the average low-temperature is 18.5°C (65.3°F).

Humidity

With an average relative humidity of 76%, August is the least humid month in Rio de Janeiro.

Rainfall

In Rio de Janeiro, during August, the rain falls for 10.4 days and regularly aggregates up to 35mm (1.38") of precipitation. 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: For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 22.3°C (72.1°F).

Daylight

In August, the average length of the day in Rio de Janeiro is 11h and 21min.
On the first day of the month, sunrise is at 06:26 and sunset at 17:31. On the last day of August, sunrise is at 06:03 and sunset at 17:42 -03.

Sunshine

In Rio de Janeiro, Brazil, the average sunshine in August is 7.8h.

UV index

In August, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the least humid month in Rio de Janeiro?

With an average relative humidity of 76%, August is the least humid month in Rio de Janeiro, Brazil.

What is the average humidity in August in Rio de Janeiro?

In August, the average relative humidity in Rio de Janeiro is 76%.

How many days does it rain in August in Rio de Janeiro?

In August, in Rio de Janeiro, the rain falls for 10.4 days. Throughout August, 35mm (1.38") of precipitation is accumulated.

What is the water temperature in August in Rio de Janeiro?

In Rio de Janeiro, Brazil, in August, the average water temperature is 22.3°C (72.1°F). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 22.3°C (72.1°F) water.

What is the average length of the day in August in Rio de Janeiro?

The average day length in August is 11h and 21min.

When are sunrise and sunset in August in Rio de Janeiro?

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.

How many hours of sunshine does Rio de Janeiro have in August?

The average sunshine duration in August in Rio de Janeiro is 7.8h.

What is the UV index intensity in August in Rio de Janeiro?

The average daily maximum UV index in August in Rio de Janeiro, Brazil, is 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to Sun's UV rays.

Average temperature in August
Rio de Janeiro, Brazil

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).

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Average pressure in August
Rio de Janeiro, Brazil

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).

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Average wind speed in August
Rio de Janeiro, Brazil

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).

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Average humidity in August
Rio de Janeiro, Brazil

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%).

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Average rainfall in August
Rio de Janeiro, Brazil

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).

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Average rainfall days in August
Rio de Janeiro, Brazil

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).

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Average sea temperature in August
Rio de Janeiro, Brazil

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).

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Average daylight in August /
Average sunshine in August
Rio de Janeiro, Brazil

Average daylight in August / Average sunshine in August - Rio de Janeiro, Brazil
  • Average daylight in August: 11h and 21min

The month with the longest days is December (Average daylight: 13h and 31min).
The month with the shortest days is June (Average daylight: 10h and 45min).

  • Average sunshine in August: 7.8h

The month with the most sunshine is February (Average sunshine: 8.8h).
The month with the least sunshine is October (Average sunshine: 7.5h).

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Average sunshine days in August
Rio de Janeiro, Brazil

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).

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Average UV index in August
Rio de Janeiro, Brazil

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).

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Average cloud cover in August
Rio de Janeiro, Brazil

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).

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Average visibility in August
Rio de Janeiro, Brazil

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).

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