Buenos Aires Weather in September

Buenos Aires in September sees pleasant temperatures, with highs around 20°C (68°F) and overnight lows of 9°C (48°F). Rainfall is fairly high at around 76 mm (3 in) on average, so pack waterproofs just in case.

Rainfall in Buenos Aires in September

You can expect rain on around 7 days based on historical patterns, with 76 mm (3 in) average for the month. Rainfall tends to arrive in short, intense showers this month. Rain days are few, but the showers can be surprisingly heavy.

Temperature in Buenos Aires in September

Buenos Aires has excellent weather in September, with days reaching 20°C (68°F) and nights cooling to 9°C (48°F). Conditions are often most pleasant around the middle of the day. Nights drop to 9°C (48°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Buenos Aires in September

The city usually sees around 186 hours of sunlight, indicating a moderately sunny period.

Wind Speed in Buenos Aires in September

Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

Average water temperature in September

With water temperatures around 12°C (54°F), swimming isn't really an option for most visitors. The cold sets in quickly and a wetsuit won't fully solve it.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Buenos Aires.