Weather in San Marcos in May
San Marcos, United States averages a high of 20.9°C (69.6°F) and low of 12.6°C (54.7°F) in May, with 2 rain days and 12.6 hours of daily sunshine. Travel score: 88.3/100 (Excellent). The best time to visit San Marcos is August.
High
21°C70°F
Low
13°C55°F
🌧️
2
rain days
☀️
12.6
hrs/day sunshine
💧
74%
humidity
88— Excellent
May in San Marcos is mild 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 May?
San Marcos receives an average of 13mm of rainfall across 2 rainy days in May. The annual total is 354.1mm.
What should I pack for San Marcos in May?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 21°C
🧴
Sunscreen SPF 30+
13 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Traveling to United States in May?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31