What September feels like in Buenos Aires
September is early spring in Buenos Aires (Buenos Aires is in the southern hemisphere, so the seasons run opposite to Europe and North America). Daytime feels cool and fresh rather than cold. Little changes after sunset — nights are cool, only slightly below the daytime level. Damp air makes the cold feel rawer than the numbers alone suggest.
Rain in Buenos Aires in September
Rain turns up now and then — about one day in 4. Rain tends to come in heavy bursts: about 11.5 mm (0.5 in) on an average rainy day. Across the year Buenos Aires averages about 11.5 mm per rainy day, so September is typical.
Daylight and sunshine in September
On 15 September the sun rises at about 6:54 am and sets around 6:44 pm local time, giving 11 h 50 min of daylight. The days are stretching out — 1 h 2 min more daylight than mid-August. About 77% of daylight hours are sunny; in short, there are plenty of bright spells.
How September compares to the rest of the year
September is the 5th coolest month of the year in Buenos Aires. Afternoons run 2.3°C (4.1°F) warmer than in August, with 18 mm more rain. October continues the upward trend. The next month's average high: 20.8°C (69.4°F).
Who September suits
- Sightseeing: a good fit — the weather rarely gets in the way of a city walk.
- Parks & outdoor: a good fit — good conditions for sitting outside.
- Beach: less ideal — the sea air is too cool.
Tips for visiting Buenos Aires in September
Rain Protection
A compact umbrella and a light waterproof jacket.
Light Jacket
A light jacket or knit layer is enough for most of the day.
Sunglasses
Bright days make sunglasses worth packing.
Quick questions
How warm is Buenos Aires in September?
Expect around 17.9°C (64.2°F) in the afternoon and 10.8°C (51.4°F) at night, which most visitors would call cool.
Does it rain a lot in Buenos Aires in September?
Not especially. There are about 7 rainy days (80 mm), mostly moderate rain.
What should I wear in Buenos Aires in September?
The numbers point to rain protection, a light jacket and sunglasses. There is little need to change for the evening.
Is September or October better for visiting Buenos Aires?
October scores better on our climate ranking (#4 of 12 vs #8), rated Great against Good. October is warmer and has more rainy days.