December weather forecastHakone, Japan

December

Weather in December

The first month of the winter, December, is still a chilly month in Hakone, Japan, with an average temperature ranging between min 4.2°C (39.6°F) and max 9.8°C (49.6°F).

Temperature

The shift from November to December includes a small decrease in the average high-temperature, from a mild 14.7°C (58.5°F) to a chilly 9.8°C (49.6°F). In Hakone, December nights witness a steady temperature drop to an icy 4.2°C (39.6°F).

Humidity

The average relative humidity in December in Hakone is 72%.

Rainfall

In Hakone, in December, during 10.5 rainfall days, 62mm (2.44") of precipitation is typically accumulated. In Hakone, Japan, during the entire year, the rain falls for 190.1 days and collects up to 1339mm (52.72") of precipitation.

Snowfall

Months with snowfall in Hakone are January through March and December. December is the first month it typically snows in Hakone, Japan. Throughout December, in the average 0.5 snowfall days, it receives 1mm (0.04") of snow. In Hakone, Japan, during the entire year, snow falls for 5.2 days and aggregates up to 49mm (1.93") of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 48min of daylight.
On the first day of December in Hakone, Japan, sunrise is at 06:33 and sunset at 16:31. On the last day of the month, sunrise is at 06:51 and sunset at 16:41 JST.

Sunshine

In December, the average sunshine in Hakone is 6.3h.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index, 2 during December, leads to the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.

Frequently asked questions

In December, in Hakone, the average high-temperature is 9.8°C (49.6°F), and the average low-temperature is 4.2°C (39.6°F). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is computed to be 33°C (91.4°F).

The average relative humidity in December is 72%.

In Hakone, during December, the rain falls for 10.5 days and regularly aggregates up to 62mm (2.44") of precipitation.

December is the first month it typically snows. Throughout December, in the average 0.5 snowfall days, it receives 1mm (0.04") of snow.

December has the shortest days of the year in Hakone, with an average of 9h and 48min of daylight.

The average day length in December in Hakone is 9h and 50min.

On the first day of December in Hakone, sunrise is at 06:33 and sunset at 16:31. On the last day of the month, sunrise is at 06:51 and sunset at 16:41 JST.

In December, the average sunshine duration in Hakone is 6.3h.

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

In December, the average daily maximum UV index in Hakone, Japan, is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Hakone, Japan

  • Average high temperature in December: 9.8°C

The warmest month (with the highest average high temperature) is August (28.3°C).
The month with the lowest average high temperature is January (7.4°C).

  • Average low temperature in December: 4.2°C

The month with the highest average low temperature is August (22.2°C).
The coldest month (with the lowest average low temperature) is January (1.3°C).

Average pressure in December
Hakone, Japan

  • Average pressure in December: 1016.7mbar

The month with the highest atmospheric pressure is November (1018.1mbar).
The month with the lowest atmospheric pressure is June (1009.1mbar).

Average wind speed in December
Hakone, Japan

  • Average wind speed in December: 12.3km/h

The windiest month (with the highest average wind speed) is March (13km/h).
The calmest month (with the lowest average wind speed) is August (10.2km/h).

Average humidity in December
Hakone, Japan

  • Average humidity in December: 72%

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is January (68%).

Average rainfall in December
Hakone, Japan

  • Average rainfall in December: 62mm

The wettest month (with the highest rainfall) is July (183mm).
The driest month (with the least rainfall) is January (51mm).

Average rainfall days in December
Hakone, Japan

  • Average rainfall days in December: 10.5 days

The month with the highest number of rainy days is July (20.8 days).
The month with the least rainy days is January (9.8 days).

Average snowfall in December
Hakone, Japan

  • Average snowfall in December: 1mm

The month with the highest snowfall is February (31mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).

Average snowfall days in December
Hakone, Japan

  • Average snowfall days in December: 0.5 days

The month with the highest number of snowfall days is February (2.7 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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

  • Average daylight in December: 9h and 48min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in December: 6h and 18min

The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).

Average sunshine days in December
Hakone, Japan

  • Average sunshine days in December: 17.5 days

The month with the most sunshine days is January (17.9 days).
The month with the least sunshine days is July (6.7 days).

Average UV index in December
Hakone, Japan

  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

Average cloud cover in December
Hakone, Japan

  • Average cloud cover in December: 29

The month with the most cloud cover is June (Cloud cover 49).
The month with the least cloud cover is January (Cloud cover 27).

Average visibility in December
Hakone, Japan

  • Average visibility in December: 10km

The months with the highest visibility are January, February, November and December (10km).
The months with the lowest visibility are March, April, May, June, July, August, September and October (9km).