Rio de Janeiro vs Sao Paulo

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Sao Paulo edges ahead as the better destination in December. Sao Paulo offers 10 hours of daily sunshine with only 20 rain days, while Rio de Janeiro sees 10 sunshine hours and 20 rain days.

Rio de Janeiro can feel quite hot at 30°C, so plan for heat. Sao Paulo is also comfortable at 26°C.

For travelers who prioritize dry weather, both cities are equally dry in December.

Rio de Janeiro reaches an average high of 30°C (86°F) and drops to 23°C (73°F) at night during December. The daily temperature range is 7°C, meaning relatively stable temperatures from day to night.

Sao Paulo averages 26°C (79°F) for the high and 18°C (64°F) for the low, with a daily range of 8°C. The 4°C difference is noticeable but not dramatic.

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

Rio de Janeiro receives approximately 226 mm of rainfall across 20 rain days during December. Rain is frequent, so waterproof gear is essential.

Sao Paulo sees 168 mm over 20 rain days. Both cities are equally rainy this month.

Both cities share similar humidity levels at 78%.