ClimateForecastDecemberJanuary >>

Otaru Climate by Month

The climate in Otaru is marked by big temperature swings throughout the year. Temperatures range from warm during the warmest months to very cold in the cooler months. It also has a relatively rain/snowy climate with high levels of precipitation. Let’s explore the climate details in depth to provide you with a complete overview.

Average day and night temperature

In Otaru, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 24°C in August to a very cold -2°C in January. Nighttime temperatures can drop, with averages reaching -8°C in January.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Otaru experiences significant rain/snowfall throughout the year, averaging 1396 mm 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 of precipitation. This rainfall is distributed across 18 rainy days.

In contrast, the driest month, April, experiences much less rainfall, totaling 77 mm over 18 rainy days. These distinct seasonal differences provide diverse experiences throughout the year.

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

Sunshine over the year

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.

Monthly hours of sunshine

Data from: Sapporo, Japan (28 KM, 17 Miles).

Daily hours of sunshine

Data from: Sapporo, Japan (28 KM, 17 Miles).

The best time of year to visit Otaru in Japan

During the months of July, August and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • Which months have the greatest rainfall in Otaru?
    Most rainfall (rainy season) is seen in August and September.
  • When is winter in Otaru?
    The coldest season / winter is in the following months: January, February, March and December.
  • Which is the warmest month in Otaru?
    August has an average maximum temperature of 24°C and is the warmest month of the year.
  • Which is the coldest month in Otaru?
    The coldest month is January with an average maximum temperature of -2°C.
  • Which is the wettest month in Otaru?
    August tops the wettest month list with 180 mm of rainfall.
  • Which is the driest month in Otaru?
    April is the driest month with 77 mm of precipitation.
  • Which is the sunniest month in Otaru?
    May is the sunniest month with an average of 199 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

    Forecast for Otaru

    Thu   Dec 12
    -3°C | -5°C
    W 18 km/h
    3.2 mm
    broken clouds and slight snow

    broken clouds and slight snow

    Fri   Dec 13
    -2°C | -5°C
    W 14 km/h
    2.7 mm
    overcast and snow

    overcast and snow

    Sat   Dec 14
    -3°C | -6°C
    NW 14 km/h
    1.7 mm
    broken clouds and slight snow

    broken clouds and slight snow