Climate almanac
Iruma
Saitama, Japan · 35.82°, 139.37°
What is the weather like in Iruma in September?
In September, Iruma is typically 78°F (26°C) during the day and 67°F (20°C) at night. The month brings about 9.1 in (232 mm) of precipitation in total.
- Average high78°F (26°C)
- Average low67°F (20°C)
- Precipitation9.1 in (232 mm)
- Clear or mostly clear days3
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)