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Climate · Buenos Aires

Buenos Aires in September

Mild and mostly dry, as the days lengthen.

Typical weather, averaged over 30 years

September in Buenos Aires is mild: highs near 66°F, lows near 51°F. Rain falls on about two days a week, less often as the month goes on, and the days lengthen by 47 minutes from the first week to the last.September in Buenos Aires is mild: highs near 19°C, lows near 11°C. Rain falls on about two days a week, less often as the month goes on, and the days lengthen by 47 minutes from the first week to the last.

High
66°F19°Caverage
Low
51°F11°Caverage
Wet days
2a week · 24% of days
Daylight
11h 57mon average

Is September a good time to visit Buenos Aires?

A good month, just outside Buenos Aires's best months, which run in two parts: March to April, or October to November.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How September sits in the year

week by week

Temperature

Highs near 66°F in September, against 59°F to 85°F through the year.Highs near 19°C in September, against 15°C to 29°C through the year.

Chance of a wet day

24% of days in September, against 20% to 31% through the year.

Cloud cover

44% cover in September, against 30% to 51% through the year.

Daylight

11h 57m in September, against 9h 52m to 14h 26m through the year.

Week by week, lightly smoothed, with September shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. August63°17°low 48°low 9°1 wet day a weekRain on about one day a week.
  2. September66°19°low 51°low 11°2 wet days a weekRain on about two days a week.
  3. October71°22°low 56°low 13°2 wet days a weekRain on about two days a week.

Where Buenos Aires sits, in September

America/Argentina/Buenos Aires
this place
typical high in September 40°F4°C95°F35°C
Sunrise, mid-September
6:54 AMsets 6:44 PM
Above the sea
30 mlow-lying
Latitude
34.6°Ssouthern hemisphere
Nearest of ours
Anisacate643 km north-west

The land around Buenos Aires, shaded by its typical high in September, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in Argentina in September

high · low · wet days
See September on the planning mapThe whole year in Buenos Aires

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Buenos Aires. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match.Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match. Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.