Buenos Aires Weather in September
Argentina · September climate averages and travel tips
Avg high17°C (63°F)
Avg low12°C (54°F)
Rainfall79 mm (3.1 in)
RatingExcellent 8.6/10
Expect mild days in Buenos Aires in September: the average high is 17°C (63°F) and the average low is 12°C (54°F). September is spring in Argentina. The month is moderately rainy, with about 79 mm (3.1 in) of rain spread over 6 days. You get roughly 11.8 hours of daylight and a mix of sun and cloud.
Is September a good time to visit Buenos Aires?
Yes — September is one of the best months to visit Buenos Aires. The weather rates excellent (8.6/10) on our comfort score.
September weather at a glance
| Average high | 17°C (63°F) |
|---|---|
| Average low | 12°C (54°F) |
| Daily mean | 15°C (58°F) |
| Rainfall | 79 mm (3.1 in) |
| Rainy days (1 mm+) | 6 |
| Humidity | 77% |
| Cloud cover | 52% |
| Daylight | 11.8 hours |
| Est. sunshine | 6.2 hours/day |
| Wind | 17.8 km/h |
| vs August | 2°C warmer than August, with 12 mm more rain. |
What to pack for Buenos Aires in September
- a warm jacket and layers
Buenos Aires weather in other months
Jan28°C / 22°C96 mmExcellentFeb27°C / 22°C112 mmExcellentMar25°C / 20°C114 mmExcellentApr21°C / 17°C90 mmExcellentMay17°C / 13°C67 mmExcellentJun15°C / 10°C47 mmExcellentJul14°C / 9°C66 mmGoodAug15°C / 10°C67 mmExcellentSep17°C / 12°C79 mmExcellentOct20°C / 15°C96 mmExcellentNov24°C / 18°C90 mmExcellentDec27°C / 20°C84 mmExcellent
← AugustBest time to visit Buenos AiresOctober →
Better weather in September nearby
- Santiago22°C · 12 mm · Excellent
- Mendoza23°C · 7 mm · Excellent
- Cordoba25°C · 29 mm · Excellent
- Arequipa26°C · 7 mm · Excellent
- Sucre23°C · 15 mm · Excellent
- Cusco19°C · 15 mm · Excellent
Nearby in September
- Montevideo16°C · 90 mm
- Cordoba25°C · 29 mm
- Porto Alegre22°C · 165 mm
- Mendoza23°C · 7 mm
- Asuncion29°C · 68 mm
- Santiago22°C · 12 mm
Where else is good in September? See where to go in September.