December weather forecastYoichi, Japan

December

Weather in December

The first month of the winter, December, is also a subzero cold month in Yoichi, Japan, with temperature in the range of an average low of -5.1°C (22.8°F) and an average high of -1°C (30.2°F).

Temperature

The move into December indicates a reduction in the average high-temperature, down from November's icy 5.4°C (41.7°F) to a subzero cold -1°C (30.2°F). December's average low-temperature in Yoichi, Japan, is -5.1°C (22.8°F), reflecting a minor difference from the day's peak temperatures.

Humidity

The average relative humidity in December is 86%.

Rainfall

In December, in Yoichi, Japan, the rain falls for 6.7 days. Throughout December, 86mm (3.39") of precipitation is accumulated. Throughout the year, there are 151.8 rainfall days, and 851mm (33.5") of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Yoichi. In December, in Yoichi, Japan, it is snowing for 22.4 days. Throughout December, 350mm (13.78") of snow is accumulated. Throughout the year, in Yoichi, Japan, there are 103.4 snowfall days, and 1437mm (56.57") of snow is accumulated.

Sea temperature

In December, the average sea temperature in Yoichi is 9.1°C (48.4°F).
Note: Navigating the 9.1°C (48.4°F) at 13°C (55.4°F) is no joy, and temperatures less than 10°C (50°F) can threaten breathing and cause a chilling shock, gauging personal stamina.

Daylight

With an average of 9h and 6min of daylight, December has the shortest days of the year in Yoichi, Japan.
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 07:08 and sunset at 16:11 JST.

Sunshine

The average sunshine in December is 1.5h.

UV index

January through March, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 1 during December leads to these advisories:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Enhance your sun protection with tightly woven, yet airy clothing. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.

Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Yoichi in December has an average high-temperature of -1°C (30.2°F) and an average low-temperature of -5.1°C (22.8°F).

In Yoichi, Japan, the average relative humidity in December is 86%.

In December, in Yoichi, the rain falls for 6.7 days. Throughout December, 86mm (3.39") of precipitation is accumulated.

In Yoichi, Japan, in December, snow falls for 22.4 days, with typically accumulated 350mm (13.78") of snow.

In December, the average sea temperature in Yoichi, Japan, is 9.1°C (48.4°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

December has the shortest days of the year in Yoichi, with an average of 9h and 6min of daylight.

In December, the average day length is 9h and 3min.

In December, on the first day of the month, sunrise is at 06:48 and sunset at 16:02. On the last day of the month, in Yoichi, Japan, sunrise is at 07:08 and sunset at 16:11 JST.

The average sunshine duration in December in Yoichi, Japan, is 1.5h.

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 1.

In December, the average daily maximum UV index in Yoichi is 1. A UV Index estimate of 2, and below, represents a low health threat from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

5.4°C

-1°C

-3.3°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

18.2km/h

20.4km/h

18.9km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

10.7

22.4

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

7.2

3.5

3.1

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Yoichi, 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
Yoichi, 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
Yoichi, 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
Yoichi, 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
Yoichi, 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
Yoichi, 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
Yoichi, 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
Yoichi, 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
Yoichi, Japan

Average sea temperature in December: 9.1°C

The best month for swimming (with the highest average sea temperature) is August (21.8°C).
The coldest month (with the lowest average sea temperature) is March (5.9°C).

Average daylight in December /
Average sunshine in December
Yoichi, Japan

Average daylight in December: 9h and 6min

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 30min

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
Yoichi, 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
Yoichi, 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).