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 7 sunshine hours and 7 rain days.

Buenos Aires is on the cooler side at 13°C, requiring warmer clothing. Rio de Janeiro is also comfortable at 25°C.

For travelers who prioritize dry weather, both cities are equally dry in July. 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 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 25°C (77°F) for the high and 17°C (63°F) for the low, with a daily range of 8°C. There is a notable 12°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 75 mm of rainfall across 7 rain days during July. Rain is occasional, so a light rain jacket should suffice.

Rio de Janeiro sees 49 mm over 7 rain days. Both cities are equally rainy this month.

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