Weather Comparison
Buenos Aires vs Cape Town
Side-by-side weather comparison for September
September Weather: Buenos Aires vs Cape Town
| Metric | Buenos Aires | Cape Town | Better |
|---|---|---|---|
| Average HighHigher is warmer | 17°C (63°F) | 18°C (64°F)▲ | Cape Town |
| Average LowHigher is milder | 11°C (52°F) | 11°C (52°F) | Tie |
| Rain DaysFewer is drier | 7 days | 7 days | Tie |
| PrecipitationLess is drier | 79 mm | 44 mm▲ | Cape Town |
| Sunshine HoursMore is sunnier | 9h/day | 10h/day▲ | Cape Town |
| HumidityLower is more comfortable | 70% | 70% | Tie |
| UV IndexLower is safer | 6 | 6 | Tie |
| Wind SpeedCalmer is better | 24 km/h | 21 km/h▲ | Cape Town |
Which City is Better in September?
Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Cape Town edges ahead as the better destination in September. Cape Town offers 10 hours of daily sunshine with only 7 rain days, while Buenos Aires sees 9 sunshine hours and 7 rain days.
Buenos Aires sits in the comfortable travel range at 17°C. Cape Town is also comfortable at 18°C.
For travelers who prioritize dry weather, both cities are equally dry in September. Cape Town receives 1 more hour of sunshine per day, which matters for sightseeing and outdoor activities.
Temperature Comparison in September
Buenos Aires reaches an average high of 17°C (63°F) and drops to 11°C (52°F) at night during September. The daily temperature range is 6°C, meaning relatively stable temperatures from day to night.
Cape Town averages 18°C (64°F) for the high and 11°C (52°F) for the low, with a daily range of 7°C. The two cities feel quite similar in terms of temperature.
Both cities are in the Southern Hemisphere, so they share the same seasonal pattern in September.
Rainfall Comparison in September
Buenos Aires receives approximately 79 mm of rainfall across 7 rain days during September. Rain is occasional, so a light rain jacket should suffice.
Cape Town sees 44 mm over 7 rain days. Both cities are equally rainy this month.
Both cities share similar humidity levels at 70%.
What to Pack: Buenos Aires vs Cape Town
Packing for Buenos Aires in September
Highs of 17°C, lows of 11°C, 7 rain days
- ✓warm layers
- ✓a mid-weight jacket
- ✓long trousers
- ✓a packable rain jacket
- ✓an umbrella
Packing for Cape Town in September
Highs of 18°C, lows of 11°C, 7 rain days
- ✓warm layers
- ✓a mid-weight jacket
- ✓long trousers
- ✓a packable rain jacket
- ✓an umbrella
Pack for both: warm layers, a mid-weight jacket, long trousers, a packable rain jacket, an umbrella. These items are useful in either destination during September.
Year-Round Comparison: Buenos Aires vs Cape Town
The table below shows average high temperatures and rain days for every month of the year, helping you find the best time to visit either city.September is highlighted for quick reference.
| Month | Buenos Aires | Cape Town | ||
|---|---|---|---|---|
| High | Rain | High | Rain | |
| Jan | 28°C | 7d | 26°C | 3d |
| Feb | 27°C | 8d | 26°C | 2d |
| Mar | 25°C | 8d | 25°C | 3d |
| Apr | 21°C | 8d | 22°C | 5d |
| May | 17°C | 7d | 19°C | 7d |
| Jun | 14°C | 7d | 17°C | 10d |
| Jul | 13°C | 7d | 17°C | 9d |
| Aug | 16°C | 7d | 17°C | 9d |
| Sep | 17°C | 7d | 18°C | 7d |
| Oct | 20°C | 10d | 20°C | 5d |
| Nov | 24°C | 8d | 22°C | 5d |
| Dec | 27°C | 8d | 24°C | 3d |
Buenos Aires Weather in September
Full forecast, packing tips, and activities
Cape Town Weather in September
Full forecast, packing tips, and activities