Weather in Kauai in September
Kauai, United States averages a high of 27.4°C (81.3°F) and low of 23.3°C (73.9°F) in September, with 16 rain days and 11.5 hours of daily sunshine. Travel score: 73.1/100 (Good). The best time to visit Kauai is January.
High
27°C81°F
Low
23°C74°F
🌧️
16
rain days
☀️
11.5
hrs/day sunshine
💧
80%
humidity
73— Good
September in Kauai is warm and rainy — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in Kauai?
How much does it rain in Kauai in September?
Kauai receives an average of 60.6mm of rainfall across 16 rainy days in September. The annual total is 874.8mm.
What should I pack for Kauai in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 27°C
🧥
Waterproof jacket
Frequent rain expected (16 rainy days)
☔
Umbrella
Essential for the rainy season
👢
Waterproof shoes
Keep your feet dry in wet conditions
🧴
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