Weather in San Marcos in September
San Marcos, United States averages a high of 26.5°C (79.7°F) and low of 17.3°C (63.1°F) in September, with 1 rain days and 11.5 hours of daily sunshine. Travel score: 95.2/100 (Excellent). The best time to visit San Marcos is August.
High
27°C80°F
Low
17°C63°F
🌧️
1
rain days
☀️
11.5
hrs/day sunshine
💧
72%
humidity
95— Excellent
September in San Marcos is warm and dry — ideal for sightseeing and outdoor activities.
What are the average temperatures in San Marcos?
How much does it rain in San Marcos in September?
San Marcos receives an average of 5.1mm of rainfall across 1 rainy days in September. The annual total is 354.1mm.
What should I pack for San Marcos in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
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Light layers and t-shirts
Warm weather around 27°C
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Sunscreen SPF 30+
12 hours of sunshine daily
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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