Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December's onset brings a reduction in the average high-temperature, from a wintry 5.4°C (41.7°F) in November to a subzero cold -1°C (30.2°F). A slight dip in temperature to -5.1°C (22.8°F) marks the average nights in Otaru during December.Humidity
The average relative humidity in December is 86%.Rainfall
In Otaru, in December, during 6.7 rainfall days, 86mm (3.39") of precipitation is typically accumulated. In Otaru, during the entire year, the rain falls for 151.8 days and collects up to 851mm (33.5") of precipitation.Snowfall
January through May, October through December are months with snowfall. In Otaru, in December, during 22.4 snowfall days, 350mm (13.78") of snow is typically accumulated. In Otaru, during the entire year, snow falls for 103.4 days and aggregates up to 1437mm (56.57") of snow.Sea temperature
In Otaru, Japan, in December, the average water temperature is 8.8°C (47.8°F).Note: In 8.8°C (47.8°F), cold shock and rapid breathing can occur when swimming at temperatures below 10°C (50°F).
Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 06:48 and sunset at 16:02. On the last day of December, sunrise is at 07:07 and sunset at 16:10 JST.
Sunshine
In December, the average sunshine is 1.5h.UV index
The months with the lowest UV index in Otaru are January through March, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: In December, a daily maximum UV index of 1 leads to the following instructions:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Frequently asked questions
How cold is December in Otaru?
What is the average humidity in December in Otaru?
How many days does it rain in December in Otaru?
How many days does it snow in December in Otaru?
What is the water temperature in December in Otaru?
What is the month with the shortest days in Otaru?
How many hours of daylight does Otaru have in December?
When are sunrise and sunset in December in Otaru?
How many hours of sunshine does Otaru have in December?
What are the months with the lowest UV index in Otaru?
What is the UV index reading in December in Otaru?
Average temperature in December
Otaru, Japan
- Average high temperature in December: -1°C
The warmest month (with the highest average high temperature) is August (23°C).
The month with the lowest average high temperature is January (-3.3°C).
- Average low temperature in December: -5.1°C
The month with the highest average low temperature is August (16.8°C).
The coldest month (with the lowest average low temperature) is February (-8.2°C).
Average pressure in December
Otaru, Japan
- Average pressure in December: 1013.1mbar
The month with the highest atmospheric pressure is November (1016.1mbar).
The month with the lowest atmospheric pressure is July (1008.5mbar).
Average wind speed in December
Otaru, Japan
- Average wind speed in December: 19km/h
The windiest month (with the highest average wind speed) is December (19km/h).
The calmest month (with the lowest average wind speed) is July (9.2km/h).
Average humidity in December
Otaru, Japan
- Average humidity in December: 86%
The month with the highest relative humidity is July (88%).
The months with the lowest relative humidity are April and October (79%).
Average rainfall in December
Otaru, Japan
- Average rainfall in December: 86mm
The wettest month (with the highest rainfall) is August (119mm).
The driest month (with the least rainfall) is April (43mm).
Average rainfall days in December
Otaru, Japan
- Average rainfall days in December: 6.7 days
The month with the highest number of rainy days is July (20.2 days).
The month with the least rainy days is February (2.5 days).
Average snowfall in December
Otaru, Japan
- Average snowfall in December: 350mm
The month with the highest snowfall is January (369mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Otaru, Japan
- Average snowfall days in December: 22.4 days
The month with the highest number of snowfall days is January (26 days).
The months with the least 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).
The 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: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 1h and 3min
The months with the most sunshine are May and August (Average sunshine: 8h and 24min).
The month with the least sunshine is January (Average sunshine: 1h and 12min).
Average sunshine days in December
Otaru, Japan
- Average sunshine days in December: 3.5 days
The month with the most sunshine days is May (14.8 days).
The month with the least sunshine days is January (3.1 days).
Average UV index in December
Otaru, Japan
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in December
Otaru, Japan
- Average cloud cover in December: 86
The month with the most cloud cover is January (Cloud cover 89).
The month with the least cloud cover is September (Cloud cover 42).
Average visibility in December
Otaru, Japan
- Average visibility in December: 8km
The month with the highest visibility is October (10km).
The month with the lowest visibility is January (7km).
Otaru, Japan
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