Otaru Weather & Climate: Best Time to Visit

In Otaru, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 24°C (75°F) in August to a very cold -2°C (28°F) in January.

Nighttime temperatures range from 18°C (64°F) in August to -8°C (18°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Otaru experiences significant rain/snowfall throughout the year, averaging 1396 mm (55 in) of precipitation annually. The seasons in Otaru bring significant changes in precipitation. The wettest month, August, receives heavy rainfall, with an average of 180 mm (7.1 in) of precipitation. This rainfall is distributed across 18 rainy days.

In contrast, the driest month, April, experiences much less rainfall, totaling 77 mm (3 in) over 18 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Otaru Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

In Otaru, summer days are longer and more sunny, with daily sunshine hours peaking at 6.6 hours in May. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 2.9 hours per average day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Otaru.

The city experiences its highest humidity in July, reaching 76%. In April, the humidity drops to its lowest level at 62%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year