Karuizawa

What is the climate like in Karuizawa?

The best time to visit Karuizawa is typically August, the year's most comfortable month (5.9/10). Karuizawa is warmest in August, when daily highs average 81°F (27°C), and coolest in January, when lows fall to about 27°F (-3°C). The wettest month is typically July and the driest is December; the year sees roughly 77 in (1951 mm) of precipitation.

• Best time to visitAugust — the year's comfort peak (5.9/10)
• Warmest monthAugust — average high 81°F (27°C)
• Coolest monthJanuary — average low 27°F (-3°C)
• Wettest monthJuly (12 in (300 mm))
• Driest monthDecember (1.8 in (46 mm))
• Annual precipitation77 in (1951 mm)
• Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
• Records fromKaruizawa, 8 km away (1965-2026)