Weather in Rio De Janeiro in August 2025
- August is usually the driest month of the year in Rio De Janeiro
Average weather
Average temperature in Rio De Janeiro in August
Going from a maximum of +38°C during the day to a minimum of +16°C during the night, the temperature in August averages around +27°C.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +25°C to +25°C.
Is Rio De Janeiro warm or cold in August?
Rio De Janeiro is typically warm in August.
Maximum temperatures go up compared to the previous month from +25°C to +25°C. The minimum temperature also goes up from +18°C to +18°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is one of the coolest months in Rio De Janeiro, here is the comparison with other months:
Water temperature in Rio De Janeiro in August
Water in Rio De Janeiro in August is Comfortable. It varies from +21°C to +24°C, with an average of +22°C. This is almost similar to the air temperature, which averages +25°C.
The water temperature in August is one of the coldest of the entire year:
Can you swim in Rio De Janeiro in August?
Climate in Rio De Janeiro in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +25°C | +25°C | +26°C | ||||
| Min. temperature | ||||||
| +12°C | +13°C | +13°C | ||||
| Max. temperature | ||||||
| +36°C | +38°C | +38°C | ||||
| Rainfall | ||||||
| 49 mm | 45 mm | 77 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +22°C | +22°C | +21°C | ||||
| Humidity | ||||||
| 77% | 76% | 77% | ||||
| Air pressure | ||||||
| 1019 HPa | 1018 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 13 | 13 | 9 | ||||
| Cloudy days | ||||||
| 7 | 7 | 6 | ||||
| Rainy days | ||||||
| 10 | 11 | 14 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as good as in July. The temperature levels stay the same in the area of +25°C for average maximum temperature during the day. As August arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 49 mm to 45 mm. It feels drier, as humidity decreases from 77% to 76%. The average wind speed doesn’t change much during August, staying around 2 m/s. The amount of sunny days stay about the same, averaging 13 sunny days during the month.
September brings much the same weather, it remains good.
Wind
The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Rio De Janeiro is gradually increasing during August, going from 2 m/s to 3 m/s over the course of the month.
Rain
How was the weather last August in Rio De Janeiro?
Climate Change over Years
The climate in Rio De Janeiro in August has not changed much over the last 43 years.
The average temperature was the lowest in 1989 (+26°C) and the highest in 2015 (+29°C). The driest year was 2001 with only 744 mm of rainfall, and the wettest year was 2019 with 2055 mm.
FAQ
Is August a good time to visit Rio De Janeiro?
Can you sunbathe in Rio De Janeiro in August?
Can you swim in Rio De Janeiro in August?
Is Rio De Janeiro rainy in August?
Is it sunny in Rio De Janeiro in August?
Other cities in Brazil
Monthly weather in Rio De Janeiro
Source of the data
For this page, we’ve looked at the typical weather in Rio De Janeiro, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.