Isahaya

What is the climate like in Isahaya?

The best time to visit Isahaya is typically October, the year's most comfortable month (6.6/10). Isahaya is warmest in August, when daily highs average 85°F (30°C), and coolest in January, when lows fall to about 44°F (7°C). The wettest month is typically June and the driest is January; the year sees roughly 89 in (2273 mm) of precipitation.

• Best time to visitOctober — the year's comfort peak (6.6/10)
• Warmest monthAugust — average high 85°F (30°C)
• Coolest monthJanuary — average low 44°F (7°C)
• Wettest monthJune (16 in (400 mm))
• Driest monthJanuary (3.2 in (81 mm))
• Annual precipitation89 in (2273 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromNagasaki, 20 km away (1951-2026)