Climate almanac
Rumoi
Hokkaido, Japan · 43.93°, 141.64°
What is the climate like in Rumoi?
The best time to visit Rumoi is typically September, the year's most comfortable month (6.3/10). Rumoi is warmest in August, when daily highs average 76°F (25°C), and coolest in January, when lows fall to about 17°F (-8°C). The wettest month is typically August and the driest is April; the year sees roughly 53 in (1353 mm) of precipitation.
- Best time to visitSeptember — the year's comfort peak (6.3/10)
- Warmest monthAugust — average high 76°F (25°C)
- Coolest monthJanuary — average low 17°F (-8°C)
- Wettest monthAugust (8.0 in (203 mm))
- Driest monthApril (2.9 in (75 mm))
- Annual precipitation53 in (1353 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromRumoi, 2 km away (1951-2026)