Normally the weather in Buenos Aires in the month of September is 13. Average high is typically 19 with low temperatures being around 11 celsius. We have put some more information here:
| Month | Degrees Celsius |
|---|---|
| Temperature | 13 |
| High Temperature | 19 |
| Low Temperature | 11 |
| Sunshine Per Day | 7 |
Useful Links: Buenos Aires Weather: Average Weather & Yearly Climate