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Best Time for Hokkaidō Summer Road Loop

Last updated: 2026-09-21

Sweet spot: May, June, July. Computed from NASA POWER climate normals across the route's overnight towns, balancing temperature, rainfall and daylight.

💡 Good to know

Use the published road season and check current roads, weather, public access and every optional activity separately.

Month	Low	High	Rain	Daylight
January	−10.3°C	−4.4°C	85 mm	9.1 h	❄
February	−10.4°C	−3.7°C	70 mm	10.2 h	❄
March	−6.5°C	0.1°C	64 mm	11.6 h	❄
April	−0.8°C	7.1°C	60 mm	13.2 h	❄
May	5.1°C	14.2°C	74 mm	14.5 h
June	10.4°C	18.9°C	83 mm	15.2 h
July	14.7°C	22.6°C	123 mm	14.9 h
August	16.0°C	23.5°C	156 mm	13.8 h
September	12.0°C	19.6°C	130 mm	12.3 h
October	5.2°C	12.7°C	111 mm	10.8 h
November	−1.2°C	4.8°C	115 mm	9.5 h	❄
December	−7.6°C	−2.3°C	112 mm	8.8 h	❄

Plan it for your month →