Weather in Karatsu in September
Karatsu, Japan averages a high of 27.1°C (80.8°F) and low of 21.7°C (71.1°F) in September, with 12 rain days and 8.8 hours of daily sunshine. Travel score: 74.2/100 (Good). The best time to visit Karatsu is October.
High
27°C81°F
Low
22°C71°F
🌧️
12
rain days
☀️
8.8
hrs/day sunshine
💧
81%
humidity
74— Good
September in Karatsu is warm and occasionally wet — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in Karatsu?
How much does it rain in Karatsu in September?
Karatsu receives an average of 176.5mm of rainfall across 12 rainy days in September. The annual total is 1666.7mm.
What should I pack for Karatsu in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 27°C
🧴
Sunscreen SPF 30+
9 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Traveling to Japan 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