December weather forecast
Yamagata, Japan

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Weather in December

In December, Yamagata plunges into the depth of winter. As daylight dwindles to 9.6 hours, snowfall returns with an average of 920mm (36.22"). The city transforms into a winter wonderland with snowy landscapes and frosted trees. Despite the freezing temperatures, the period is a paradise for snow fans, particularly those eager for winter sports. As the year concludes, Yamagata's weather retains its winter chill, setting the mood for the forthcoming January.

Temperature

December indicates a shift in the average high-temperature, from November's cool 12°C (53.6°F) to a chilly 6°C (42.8°F). Yamagata records a consistent low-temperature of -1°C (30.2°F) during December nights.

Rainfall

In Yamagata, in December, during 27 rainfall days, 77mm (3.03") of precipitation is typically accumulated. In Yamagata, during the entire year, the rain falls for 260 days and collects up to 1125mm (44.29") of precipitation.

Snowfall

Months with snowfall in Yamagata are January through April, November and December. In Yamagata, in December, 920mm (36.22") of snow is typically accumulated. In Yamagata, during the entire year, snow aggregates up to 4880mm (192.13").

Daylight

With an average of 9h and 36min of daylight, December has the shortest days of the year in Yamagata.
On the first day of the month, sunrise is at 06:36 and sunset at 16:18. On the last day of December, sunrise is at 06:55 and sunset at 16:28 JST.

Sunshine

With an average of 3h of sunshine, December has the least sunshine of the year.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index in Yamagata. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.
Note: The UV index of 2 in December translates into these instructions:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
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Frequently asked questions

Is it cold in Yamagata during December?

An average high-temperature, in December, in Yamagata, is 6°C (42.8°F) and the average low-temperature is -1°C (30.2°F).

How much does it rain in Yamagata in December?

In Yamagata, Japan, in December, it is raining for 27 days, with typically 77mm (3.03") of accumulated precipitation.

How much does it snow in Yamagata in December?

Throughout December, in Yamagata, Japan, 920mm (36.22") of snow is accumulated.

What is the month with the shortest days in Yamagata?

December has the shortest days of the year in Yamagata, Japan, with an average of 9h and 36min of daylight.

How many hours of daylight does Yamagata have in December?

In December, the average day length in Yamagata, Japan, is 9h and 34min.

What time are sunrise and sunset in December in Yamagata?

On the first day of December in Yamagata, Japan, sunrise is at 06:36 and sunset at 16:18. On the last day of the month, sunrise is at 06:55 and sunset at 16:28 JST.

What is the month with the least sunshine in Yamagata?

December has the least sunshine of the year, with an average of 3h of sunshine.

How long on average sun shines in December in Yamagata?

In December, the average sunshine duration in Yamagata, Japan, is 3h.

What is the month with the lowest UV index in Yamagata?

January and December, with an average maximum UV index of 2, are months with the lowest UV index in Yamagata, Japan.

How high is the UV index in December in Yamagata?

The average daily maximum UV index in December in Yamagata, Japan, is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation.
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in December
Yamagata, Japan

Average temperature in December - Yamagata, Japan
  • Average high temperature in December: 6°C

The warmest month (with the highest average high temperature) is August (30°C).
The month with the lowest average high temperature is January (3°C).

  • Average low temperature in December: -1°C

The month with the highest average low temperature is August (20°C).
The coldest months (with the lowest average low temperature) are January and February (-4°C).

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Average rainfall in December
Yamagata, Japan

Average rainfall in December - Yamagata, Japan
  • Average rainfall in December: 77mm

The wettest month (with the highest rainfall) is August (149mm).
The driest month (with the least rainfall) is March (67mm).

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Average rainfall days in December
Yamagata, Japan

Average rainfall days in December - Yamagata, Japan
  • Average rainfall days in December: 27 days

The month with the highest number of rainy days is January (29 days).
The month with the least rainy days is May (17 days).

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Average snowfall in December
Yamagata, Japan

Average snowfall in December - Yamagata, Japan
  • Average snowfall in December: 920mm

The month with the highest snowfall is January (1630mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

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

Average daylight in December / Average sunshine in December - Yamagata, Japan
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 3h

The month with the most sunshine is May (Average sunshine: 7h).
The month with the least sunshine is December (Average sunshine: 3h).

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Average UV index in December
Yamagata, Japan

Average UV index in December - Yamagata, Japan
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 10).
The months with the lowest UV index are January and December (UV index 2).

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Yamagata, Japan

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