Buenos Aires vs Rio de Janeiro

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

Buenos Aires is on the cooler side at 13°C, requiring warmer clothing. Rio de Janeiro is also comfortable at 26°C.

For travelers who prioritize dry weather, Rio de Janeiro is the stronger choice in July.

Buenos Aires reaches an average high of 13°C (55°F) and drops to 8°C (46°F) at night during July. The daily temperature range is 5°C, meaning relatively stable temperatures from day to night.

Rio de Janeiro averages 26°C (79°F) for the high and 17°C (63°F) for the low, with a daily range of 9°C. There is a notable 13°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 July.

Buenos Aires receives approximately 76 mm of rainfall across 8 rain days during July. You can expect rain roughly every other day.

Rio de Janeiro sees 47 mm over 7 rain days. That makes Rio de Janeiro 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.