Weather in Buenos Aires in September
September in Buenos Aires is cool with average temperatures around 14.4°C (57.9°F). Moderate rainfall of 83mm spread over 6 days.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
17.1°C
62.8°F
Low
11.7°C
53.1°F
Precipitation
83 mm
3.3 inches
~6 rainy days
Conditions
Humidity
78%
Comparison to Adjacent Months
September is 2.9°C cooler than October, 27mm drier than October.