Argentina Buenos Aires Weather in September (Early Spring · Top Pick) — Climate Guide
September (Early Spring · Top Pick) in Buenos Aires is high
September (Early Spring · Top Pick) is high for Buenos Aires.
September is the start of spring and a top season.
Travel score
Buenos Aires September (Early Spring · Top Pick) Weather Stats
Avg High
18°C
Avg Low
9°C
Rainy Days
8
80mm total
Sunshine
7h
Daily avg
Humidity
70%
comfortable
UV Index
7
High
Wind
13 km/h
Gusts 26
Sea Temp
0°C
no swimming
Crowds
Busy
At attractions
September (Early Spring · Top Pick) Sunrise & Sunset
Air Quality
PM2.5
18 μg/m³
PM10
38 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
18°C
Nighttime
9°C
Humidity and wind affect how the actual temperature feels.
Wind
13 km/h
Max gust 26 km/h
Activities Recommended for September (Early Spring · Top Pick)
September (Early Spring · Top Pick) Travel Pros & Cons
Pros
- A pleasant 18/9°C climate
- Dry and clear
Cons
- Hotels start to climb
September (Early Spring · Top Pick) Events & Festivals
- Spring begins
Buenos Aires in September (Early Spring · Top Pick) — Full Picture
September is the start of spring and a top season.
What to Wear & What to Pack
Spring begins.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
22°C
14.3°C
8/mo
Summer (Jun·Jul·Aug)
14.7°C
7.7°C
7/mo
Autumn (Sep·Oct·Nov)
Current21.7°C
12°C
8.7/mo
Winter (Dec·Jan·Feb)
29°C
20°C
8.3/mo
Buenos Aires Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| January (Summer · Best) (Best) | 30° | 21° | 9d·120mm | 9h | 70% | 11 | Very busy | Peak |
| February (Summer) (Best) | 29° | 20° | 8d·110mm | 9h | 70% | 11 | Very busy | Peak |
| 26° | 18° | 9d·130mm | 8h | 75% | 9 | Busy | Peak | |
| April (Autumn · Best) (Best) | 22° | 14° | 8d·100mm | 7h | 75% | 6 | Busy | Peak |
| May (Late Autumn) (Best) | 18° | 11° | 7d·90mm | 6h | 80% | 4 | Moderate | Shoulder |
| 14° | 8° | 7d·60mm | 5h | 80% | 3 | Quiet | Low season | |
| 14° | 7° | 7d·60mm | 5h | 80% | 3 | Quiet | Low season | |
| 16° | 8° | 7d·70mm | 6h | 75% | 5 | Busy | Peak | |
| 18° | 9° | 8d·80mm | 7h | 70% | 7 | Busy | Peak | |
| October (Spring · Top Pick) (Best) | 22° | 12° | 9d·100mm | 8h | 70% | 9 | Very busy | Peak |
| 25° | 15° | 9d·110mm | 9h | 70% | 11 | Very busy | Peak | |
| 28° | 19° | 8d·100mm | 9h | 70% | 11 | Very busy | Peak |
View Other Months
Buenos Aires September (Early Spring · Top Pick) Hotel Picks
Frequently Asked Questions
Is September (Early Spring · Top Pick) a good time to visit Buenos Aires?
Buenos Aires in September (Early Spring · Top Pick) is high. Tourist crowds are busy and flight/hotel prices are peak.
What's the average temperature in Buenos Aires in September (Early Spring · Top Pick)?
Buenos Aires September (Early Spring · Top Pick) averages a high of 18°C and a low of 9°C.
Does it rain much in Buenos Aires in September (Early Spring · Top Pick)?
Buenos Aires September (Early Spring · Top Pick) averages 80mm of rainfall over about 8 rainy days.
What should I wear in Buenos Aires in September (Early Spring · Top Pick)?
Spring begins.
What time are sunrise and sunset in Buenos Aires in September (Early Spring · Top Pick)?
Buenos Aires September (Early Spring · Top Pick) sunrise is 07:10 and sunset is 18:45, with 11h 35min of daylight.
What's the air quality like in Buenos Aires in September (Early Spring · Top Pick)?
Buenos Aires September (Early Spring · Top Pick) air quality (AQI) averages 45, rated Good. PM2.5 averages 18μg/m³.
What activities are recommended in Buenos Aires in September (Early Spring · Top Pick)?
In September (Early Spring · Top Pick), Buenos Aires is great for Tango, Recoleta, Mendoza.
Is September (Early Spring · Top Pick) peak season in Buenos Aires?
Buenos Aires September (Early Spring · Top Pick) crowds are busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Buenos Aires
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.