Argentina
Buenos Aires in September: weather & travel advice
This month's data profile
Strong month under the current formula
Buenos Aires in September is climatically well suited to city breaks and active holidays and hiking. The average daily high is around 17 °C. With about 6 rainy days it is moderate.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
74/100 · #8
Warmth
#9
Dryness
#4
Sun
#7
Published best categories: Active
Buenos Aires · SeptemberPhoto: David Berkowitz from New York, NY, USA · CC BY 2.0Climate facts
- Average high
- 17 °C
- Average low
- 12 °C
- Rainy days (est.)
- 6 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 77 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Score |
|---|---|---|---|---|---|---|---|---|
| August | 15 | 10 | 6 | 67 | 4.2 | 80 | 4.6 | 66 |
| September (selected) | 17 | 12 | 6 | 73 | 5.6 | 77 | 4.8 | 74 |
| October | 20 | 14 | 9 | 99 | 7.0 | 75 | 4.8 | 79 |
How do the previous and next months compare?
Baseline: September (74/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | |
|---|---|---|---|---|---|---|---|---|
| August | -8 | -1.9 °C | -1.7 °C | -0.2 | -5.6 mm | -1.4 h | +2.4 % | -0.3 m/s |
| October | +5 | +3.1 °C | +2.8 °C | +2.8 | +26.7 mm | +1.4 h | -1.8 % | ±0 m/s |
All twelve months in context
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Where to stay in Buenos Aires
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Useful next decisions
Frequently asked questions
How warm is Buenos Aires in September?
The average daily high is around 17 °C, with an average daily low of about 12 °C.
Does it rain a lot in Buenos Aires in September?
The curated estimate is about 6 rainy days per month, not a directly measured long-term average. Total precipitation averages around 73 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Buenos Aires?
By the climate score, March, April, November and December are the strongest months for Buenos Aires. September is not among them.