Weather in San Juan in September
San Juan, Peru averages a high of 30.4°C (86.7°F) and low of 23.3°C (73.9°F) in September, with 21 rain days and 9.7 hours of daily sunshine. Travel score: 66.5/100 (Good). The best time to visit San Juan is August.
High
30°C87°F
Low
23°C74°F
🌧️
21
rain days
☀️
9.7
hrs/day sunshine
💧
88%
humidity
67— Good
September in San Juan is hot and very rainy — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in San Juan?
How much does it rain in San Juan in September?
San Juan receives an average of 156.3mm of rainfall across 21 rainy days in September. The annual total is 2646.7mm.
What should I pack for San Juan in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light, breathable clothing
Hot weather with highs around 30°C
🧢
Sun hat or cap
Protection from intense sun
🧥
Waterproof jacket
Frequent rain expected (21 rainy days)
☔
Umbrella
Essential for the rainy season
👢
Waterproof shoes
Keep your feet dry in wet conditions
🧴
Sunscreen SPF 30+
10 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
🎉Visiting Peru in September?
Don't miss any public holidays — check before you book!
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What is the weather like in other months in San Juan?
Data based on 1994–2024 averages · Last updated: 2024-12-31