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Weather Comparison

Buenos Aires vs Cape Town

Side-by-side weather comparison for September

Buenos Aires: 17°CCape Town: 18°C6,870 km apart

September Weather: Buenos Aires vs Cape Town

MetricBuenos AiresCape TownBetter
Average HighHigher is warmer17°C (63°F)18°C (64°F)Cape Town
Average LowHigher is milder11°C (52°F)11°C (52°F)Tie
Rain DaysFewer is drier7 days7 daysTie
PrecipitationLess is drier79 mm44 mmCape Town
Sunshine HoursMore is sunnier9h/day10h/dayCape Town
HumidityLower is more comfortable70%70%Tie
UV IndexLower is safer66Tie
Wind SpeedCalmer is better24 km/h21 km/hCape 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.

MonthBuenos AiresCape Town
HighRainHighRain
Jan28°C7d26°C3d
Feb27°C8d26°C2d
Mar25°C8d25°C3d
Apr21°C8d22°C5d
May17°C7d19°C7d
Jun14°C7d17°C10d
Jul13°C7d17°C9d
Aug16°C7d17°C9d
Sep17°C7d18°C7d
Oct20°C10d20°C5d
Nov24°C8d22°C5d
Dec27°C8d24°C3d
17°

Buenos Aires Weather in September

Full forecast, packing tips, and activities

18°

Cape Town Weather in September

Full forecast, packing tips, and activities

Frequently Asked Questions

Is Buenos Aires warmer than Cape Town in September?
No. In September, Cape Town is warmer with an average high of 18°C (64°F) compared to Buenos Aires at 17°C (63°F), a difference of 1°C.
Which city gets more rain in September, Buenos Aires or Cape Town?
Both cities average 7 rain days in September with similar precipitation levels.
Is it better to visit Buenos Aires or Cape Town in September?
It depends on your preferences. Buenos Aires averages 17°C and 9 hours of daily sunshine with 7 rain days. Cape Town averages 18°C with 10 sunshine hours and 7 rain days. If you prefer cooler conditions, choose Cape Town. For fewer rain days, both are equal.
How far apart are Buenos Aires and Cape Town?
Buenos Aires and Cape Town are approximately 6,870 km (4,266 miles) apart. Buenos Aires is located in Argentina (South America) while Cape Town is in South Africa (Africa).
What is the best month to visit Buenos Aires and Cape Town?
For Buenos Aires, January tends to be the best month with 12 hours of daily sunshine and a high of 28°C. For Cape Town, February is typically ideal with 13 sunshine hours and 26°C highs.

Compare Buenos Aires and Cape Town in Other Months

Climate data sourced from the Open-Meteo Historical Weather API, using ERA5 reanalysis data covering 30-year normals from 1991 to 2020. All temperatures shown in Celsius with Fahrenheit equivalents. Rain days count days with 1 mm or more of precipitation. Sunshine hours represent average daily values. This comparison is generated from long-term climate averages and individual trips may vary.

Buenos Aires coordinates: -34.60°N, -58.38°E | Cape Town coordinates: -33.92°N, 18.42°E