Weather in Koshigaya in September
Koshigaya, Japan averages a high of 26.7°C (80.1°F) and low of 20°C (68°F) in September, with 13 rain days and 7.8 hours of daily sunshine. Travel score: 72.2/100 (Good). The best time to visit Koshigaya is August.
High
27°C80°F
Low
20°C68°F
🌧️
13
rain days
☀️
7.8
hrs/day sunshine
💧
80%
humidity
72— Good
September in Koshigaya is warm and occasionally wet — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in Koshigaya?
How much does it rain in Koshigaya in September?
Koshigaya receives an average of 175.8mm of rainfall across 13 rainy days in September. The annual total is 1363.7mm.
What should I pack for Koshigaya in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 27°C
🧴
Sunscreen SPF 30+
8 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