Otaru
Japan
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Otaru, Japan

The first month of the winter, December, is also a wintry month in Otaru, Japan, with average temperature ranging between min -3.7°C (25.3°F) and max 1.7°C (35.1°F).

Temperature

In December, the average high-temperature drops, from a chilly 8.1°C (46.6°F) in November, to a wintry 1.7°C (35.1°F). In Otaru, in December, the average low-temperature is -3.7°C (25.3°F).

Humidity

The average relative humidity in December is 70%.

Rainfall

In Otaru, Japan, during December, the rain falls for 23.5 days and regularly aggregates up to 141.4mm (5.6") of precipitation. In Otaru, during the entire year, the rain falls for 193 days and collects up to 1235mm (48.6") of precipitation.

Snowfall

Months with snowfall in Otaru are January through April, October through December. In Otaru, Japan, during December, snow falls for 28 days and regularly aggregates up to 1560mm (61.4") of snow. Throughout the year, there are 125.7 snowfall days, and 6740mm (265.4") of snow is accumulated.

Sea temperature

In Otaru, the average seawater temperature is 8.8°C (47.8°F).
Note: Swimming in 8.8°C (47.8°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

December has the shortest days of the year, with an average of 9.1h of daylight.

Sunshine

With an average of 2h of sunshine, December has the least sunshine of the year.

What is the temperature in December in Otaru?

In December, in Otaru, Japan, the average high-temperature is 1.7°C (35.1°F), and the average low-temperature is -3.7°C (25.3°F).

What is the average humidity in December in Otaru?

The average relative humidity in December in Otaru, Japan, is 70%.

How many days does it rain in December in Otaru?

In Otaru, Japan, during December, the rain falls for 23.5 days and regularly aggregates up to 141.4mm (5.6") of precipitation.

How much does it snow in Otaru in December?

In Otaru, during December, snow falls for 28 days and regularly aggregates up to 1560mm (61.4") of snow.

What is the sea water temperature in December in Otaru?

In December, the average sea temperature in Otaru is 8.8°C (47.8°F). Swimming in 8.8°C (47.8°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Otaru?

With an average of 9.1h of daylight, December has the shortest days of the year in Otaru, Japan.

What is the average length of the day in December in Otaru?

In December, the average length of the day in Otaru is 9.1h.

What is the month with the least sunshine in Otaru?

With an average of 2h of sunshine, December has the least sunshine of the year in Otaru, Japan.

How long on average sun shines in December in Otaru?

The average sunshine in December in Otaru is 2h.
Average temperature in December - Otaru, Japan
  • Average high temperature in December: 1.7°C

The warmest month (with the highest average high temperature) is August (25.6°C).
The month with the lowest average high temperature is January (-0.7°C).

  • Average low temperature in December: -3.7°C

The month with the highest average low temperature is August (18.4°C).
The coldest month (with the lowest average low temperature) is January (-6.1°C).

Average humidity in December - Otaru, Japan
  • Average humidity in December: 70%

The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is April (64%).

Average rainfall in December - Otaru, Japan
  • Average rainfall in December: 141.4mm

The wettest month (with the highest rainfall) is November (146.8mm).
The driest month (with the lowest rainfall) is June (46.3mm).

Average rainfall days in December - Otaru, Japan
  • Average rainfall days in December: 23.5 days

The month with the highest number of rainy days is January (25.5 days).
The month with the lowest number of rainy days is June (8.6 days).

Average snowfall in December - Otaru, Japan
  • Average snowfall in December: 1560mm

The month with the highest snowfall is January (1940mm).
Months with the lowest snowfall are May, June, July, August and September (0mm).

Average snowfall days in December - Otaru, Japan
  • Average snowfall days in December: 28 days

The month with the highest number of snowfall days is January (29.4 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average sea temperature in December - Otaru, Japan
  • Average sea temperature in December: 8.8°C

The best month for swimming (with the highest average sea temperature) is August (21.6°C).
Coldest months (with the lowest average sea temperature) are February and March (5.3°C).

Average daylight in December / Average sunshine in December - Otaru, Japan
  • Average daylight in December: 9.1h

The month with the longest days is June (Average daylight: 15.3h).
The month with shortest days is December (Average daylight: 9.1h).

  • Average sunshine in December: 2h

The month with most sunshine is May (Average sunshine: 6.5h).
The month with least sunshine is December (Average sunshine: 2h).