Weather in Iruma in September
Iruma, Japan averages a high of 25.4°C (77.7°F) and low of 19°C (66.2°F) in September, with 16 rain days and 7.9 hours of daily sunshine. Travel score: 67.9/100 (Good). The best time to visit Iruma is May.
High
25°C78°F
Low
19°C66°F
🌧️
16
rain days
☀️
7.9
hrs/day sunshine
💧
83%
humidity
68— Good
September in Iruma is warm and rainy — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in Iruma?
How much does it rain in Iruma in September?
Iruma receives an average of 233mm of rainfall across 16 rainy days in September. The annual total is 1795.1mm.
What should I pack for Iruma in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 25°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+
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