Weather in Key West in September
Key West, United States averages a high of 28.7°C (83.7°F) and low of 26.9°C (80.4°F) in September, with 17 rain days and 10.6 hours of daily sunshine. Travel score: 69.4/100 (Good). The best time to visit Key West is March.
High
29°C84°F
Low
27°C80°F
🌧️
17
rain days
☀️
10.6
hrs/day sunshine
💧
79%
humidity
69— Good
September in Key West is hot and rainy — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in Key West?
How much does it rain in Key West in September?
Key West receives an average of 141.6mm of rainfall across 17 rainy days in September. The annual total is 837.3mm.
What should I pack for Key West in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 29°C
🧥
Waterproof jacket
Frequent rain expected (17 rainy days)
☔
Umbrella
Essential for the rainy season
👢
Waterproof shoes
Keep your feet dry in wet conditions
🧴
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