Hachijojima Weather in December

In Hachijojima, December brings pleasant daytime temperatures around 18°C (64°F), with nights cooling to 14°C (57°F). Expect quite a bit of rainfall this month.

Rainfall in Hachijojima in December

Typically around 12 days of rainfall are expected, averaging 152 mm (6 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Hachijojima in December

Daytime temperatures in Hachijojima reach 18°C (64°F) in December, dropping to 14°C (57°F) at night. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With overnight lows of 14°C (57°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Hachijojima in December

The month experiences a moderate amount of sunlight, with 103 hours of sunshine. This provides a nice balance between sunshine and clouds.

Wind Speed in Hachijojima in December

Wind speeds average 6 m/s (12 knots) during December. At this speed, expect strong winds that make large branches move and create some resistance when walking. Since this is an average, some days have fresh winds while others have strong breezes that can make umbrellas tricky to control.

Average water temperature in December

At 20°C (68°F), the water is pleasant for swimming. Most people find this range ideal, cool enough to be refreshing, warm enough to stay in comfortably.

If your ideal day consists of dry skies and pleasant temperatures, April, May, July and August typically offer the best circumstances for Hachijojima.