Weather in San Clemente in September
San Clemente, United States averages a high of 25.4°C (77.7°F) and low of 18.2°C (64.8°F) in September, with 1 rain days and 11.6 hours of daily sunshine. Travel score: 93.9/100 (Excellent). The best time to visit San Clemente is July.
High
25°C78°F
Low
18°C65°F
🌧️
1
rain days
☀️
11.6
hrs/day sunshine
💧
76%
humidity
94— Excellent
September in San Clemente is warm and dry — ideal for sightseeing and outdoor activities.
What are the average temperatures in San Clemente?
How much does it rain in San Clemente in September?
San Clemente receives an average of 5.8mm of rainfall across 1 rainy days in September. The annual total is 351.8mm.
What should I pack for San Clemente in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 25°C
🧴
Sunscreen SPF 30+
12 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