Buenos Aires vs Rio de Janeiro

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Buenos Aires edges ahead as the better destination in August. Buenos Aires offers 8 hours of daily sunshine with only 7 rain days, while Rio de Janeiro sees 9 sunshine hours and 8 rain days.

Buenos Aires sits in the comfortable travel range at 16°C. Rio de Janeiro is also comfortable at 26°C.

For travelers who prioritize dry weather, Buenos Aires is the stronger choice in August. Rio de Janeiro receives 1 more hour of sunshine per day, which matters for sightseeing and outdoor activities.

Buenos Aires reaches an average high of 16°C (61°F) and drops to 9°C (48°F) at night during August. The daily temperature range is 7°C, meaning relatively stable temperatures from day to night.

Rio de Janeiro averages 26°C (79°F) for the high and 18°C (64°F) for the low, with a daily range of 8°C. There is a notable 10°C gap between the two cities, so expect a very different feel.

Both cities are in the Southern Hemisphere, so they share the same seasonal pattern in August.

Buenos Aires receives approximately 72 mm of rainfall across 7 rain days during August. Rain is occasional, so a light rain jacket should suffice.

Rio de Janeiro sees 43 mm over 8 rain days. That makes Buenos Aires the drier option by 1 rain day and 29 mm of total precipitation.

Humidity also differs: Buenos Aires averages 70% while Rio de Janeiro sits at 78%. Rio de Janeiro will feel muggier, especially at higher temperatures.