Weather in San Francisco in September
San Francisco, United States averages a high of 22°C (71.6°F) and low of 13.4°C (56.1°F) in September, with 1 rain days and 11.7 hours of daily sunshine. Travel score: 89.9/100 (Excellent). The best time to visit San Francisco is September.
High
22°C72°F
Low
13°C56°F
🌧️
1
rain days
☀️
11.7
hrs/day sunshine
💧
76%
humidity
90— Excellent
September in San Francisco is warm and dry — ideal for sightseeing and outdoor activities.
What are the average temperatures in San Francisco?
How much does it rain in San Francisco in September?
San Francisco receives an average of 2.2mm of rainfall across 1 rainy days in September. The annual total is 499.2mm.
What should I pack for San Francisco in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 22°C
🧴
Sunscreen SPF 30+
12 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Traveling to United States in September?
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