Unzen

What is the climate like in Unzen?

The best time to visit Unzen is typically October, the year's most comfortable month (6.5/10). Unzen is warmest in August, when daily highs average 92°F (33°C), and coolest in January, when lows fall to about 40°F (5°C). The wettest month is typically June and the driest is January; the year sees roughly 86 in (2188 mm) of precipitation.

• Best time to visitOctober — the year's comfort peak (6.5/10)
• Warmest monthAugust — average high 92°F (33°C)
• Coolest monthJanuary — average low 40°F (5°C)
• Wettest monthJune (15 in (392 mm))
• Driest monthJanuary (2.8 in (70 mm))
• Annual precipitation86 in (2188 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromNagasaki, 36 km away (1951-2026)