Weather in Buenos Aires in September
In an average September, Buenos Aires sees a daily high around 19°C and a low around 9°C, based on 1980–2026 of local climate records.
| Average high | 19°C |
|---|---|
| Typical high range | 14°C to 24°C |
| Average low | 9°C |
| Typical low range | 4°C to 14°C |
| Average daily precipitation | 3 mm |
September records
The most extreme September on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
33°C
2013-09-10
Lowest
8°C
1981-09-14
Low
Highest
22°C
2013-09-10
Lowest
-2°C
1996-09-06
Feels-like
Highest
44°C
1994-09-19
Lowest
-7°C
1996-09-06
Humidity
Highest
19.6 g/m³
1994-09-19
Lowest
3.7 g/m³
2015-09-11
Wind
Highest
48 km/h
1998-09-27
Lowest
7 km/h
1989-09-27
Gust
Highest
90 km/h
1983-09-26
Lowest
11 km/h
2026-09-25
Precip
Wettest
189 mm
1982
Driest
14 mm
2022
See Buenos Aires's live weather grade →
Visiting Buenos Aires in September? See how its comfort stacks up against where you live.
Compare Buenos Aires with your city →