Weather in San Juan in September
San Juan, Argentina averages a high of 22.3°C (72.1°F) and low of 8.2°C (46.8°F) in September, with 3 rain days and 10.9 hours of daily sunshine. Travel score: 89.6/100 (Excellent). The best time to visit San Juan is November.
High
22°C72°F
Low
8°C47°F
🌧️
3
rain days
☀️
10.9
hrs/day sunshine
💧
44%
humidity
90— Excellent
September in San Juan is warm and dry — ideal for sightseeing and outdoor activities.
What are the average temperatures in San Juan?
How much does it rain in San Juan in September?
San Juan receives an average of 14mm of rainfall across 3 rainy days in September. The annual total is 164.2mm.
What should I pack for San Juan in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 22°C
🧴
Sunscreen SPF 30+
11 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Evening jacket or cardigan
Temperature drops 14°C from day to night
Traveling to Argentina in September?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
🏛️ 121 countries·📅 Updated yearly·✈️ Free forever
Compare San Juan
Popular comparisons:
How can I plan my trip to San Juan?
What other cities are near San Juan?
What are other popular cities in Argentina?
What is the weather like in other months in San Juan?
Data based on 1994–2024 averages · Last updated: 2024-12-31