Hachijojima Weather in September

In Hachijojima, September brings high daytime temperatures around 28°C (82°F), with nights cooling to 25°C (77°F). This month falls within the rainy season, so expect frequent rainfall.

Rainfall in Hachijojima in September

Hachijojima is in the rainy season in September, with rain on around 18 days and an average of 243 mm (9.6 in). The rainy season here brings regular, substantial showers. It's worth being prepared for rain on most days you're out.

Temperature in Hachijojima in September

If you're visiting Hachijojima in September, expect highs of 28°C (82°F) and overnight lows around 25°C (77°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. At 25°C (77°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.

Sunshine in Hachijojima in September

The area enjoys a balanced 142 hours of sunlight, ensuring it's neither too rainy nor too sunny.

Wind Speed in Hachijojima in September

September has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.

Average water temperature in September

With water at 26°C (79°F), you can expect warm, pleasant conditions for any water activity. There's no adjustment period, it feels comfortable straight away.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. April, May, July and August typically offer the best weather for Hachijojima.