Cape Town vs Buenos Aires

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Buenos Aires edges ahead as the better destination in September. Buenos Aires offers 4 hours of daily sunshine with only 4 rain days, while Cape Town sees 10 sunshine hours and 7 rain days.

Cape Town sits in the comfortable travel range at 18°C. Buenos Aires is also comfortable at 16°C.

For travelers who prioritize dry weather, Buenos Aires is the stronger choice in September. Cape Town receives 6 more hours of sunshine per day, which matters for sightseeing and outdoor activities.

Cape Town reaches an average high of 18°C (64°F) and drops to 11°C (52°F) at night during September. The daily temperature range is 7°C, meaning relatively stable temperatures from day to night.

Buenos Aires averages 16°C (61°F) for the high and 8°C (46°F) for the low, with a daily range of 8°C. The 2°C difference is noticeable but not dramatic.

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

Cape Town receives approximately 44 mm of rainfall across 7 rain days during September. Rain is occasional, so a light rain jacket should suffice.

Buenos Aires sees 50 mm over 4 rain days. That makes Buenos Aires the drier option by 3 rain days and 6 mm of total precipitation.

Humidity also differs: Cape Town averages 70% while Buenos Aires sits at 65%. Cape Town will feel muggier, especially at higher temperatures.