Weather in San Antonio in September
San Antonio, United States averages a high of 31.9°C (89.4°F) and low of 22.2°C (72°F) in September, with 8 rain days and 10.5 hours of daily sunshine. Travel score: 88/100 (Excellent). The best time to visit San Antonio is September.
High
32°C89°F
Low
22°C72°F
🌧️
8
rain days
☀️
10.5
hrs/day sunshine
💧
65%
humidity
88— Excellent
September in San Antonio is hot and occasionally wet — excellent conditions for exploring.
What are the average temperatures in San Antonio?
How much does it rain in San Antonio in September?
San Antonio receives an average of 79.5mm of rainfall across 8 rainy days in September. The annual total is 832.6mm.
What should I pack for San Antonio in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light, breathable clothing
Hot weather with highs around 32°C
🧢
Sun hat or cap
Protection from intense sun
🧴
Sunscreen SPF 30+
11 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
🎉Visiting United States in September?
Don't miss any public holidays — check before you book!
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Data based on 1994–2024 averages · Last updated: 2024-12-31