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 arrival comes with a decrease in the average high-temperature, moving from an enjoyable 16.3°C (61.3°F) in November to a fresh 10.4°C (50.7°F). Hekinan sustains a near constant temperature throughout December, with nighttime averages of 5.4°C (41.7°F).Humidity
In Hekinan, the average relative humidity in December is 72%.Rainfall
In Hekinan, Japan, in December, it is raining for 10.5 days, with typically 40mm (1.57") of accumulated precipitation. In Hekinan, during the entire year, the rain falls for 156 days and collects up to 899mm (35.39") of precipitation.Snowfall
January, February and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 1.1 snowfall days, it receives 5mm (0.2") of snow. In Hekinan, during the entire year, snow falls for 5.3 days and aggregates up to 28mm (1.1") of snow.Sea temperature
In December, the average sea temperature in Hekinan is 17.5°C (63.5°F).Note: Swimming in water that is 17.5°C (63.5°F) is not enjoyable for most. Breathing becomes more challenging to manage as the water temperature dips from 21°C (69.8°F) to 15°C (59°F).
Daylight
December has the shortest days of the year, with an average of 9h and 54min of daylight.On the first day of December in Hekinan, sunrise is at 06:41 and sunset at 16:40. On the last day of the month, sunrise is at 06:59 and sunset at 16:50 JST.
Sunshine
The average sunshine in December is 6.1h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: In December, an average UV index of 2 transforms into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
What is the usual temperature for Hekinan in December?
What is the average humidity in December in Hekinan?
How many days does it rain in December in Hekinan?
When does it start snowing in Hekinan?
What is the sea water temperature in December in Hekinan?
What is the month with the shortest days in Hekinan?
How many hours of daylight does Hekinan have in December?
When are sunrise and sunset in December in Hekinan?
How many hours of sunshine does Hekinan have in December?
What is the month with the lowest UV index in Hekinan?
What is the UV index intensity in December in Hekinan?
Average temperature in December
Hekinan, Japan
- Average high temperature in December: 10.4°C
The warmest month (with the highest average high temperature) is August (31.4°C).
The month with the lowest average high temperature is January (8.3°C).
- Average low temperature in December: 5.4°C
The month with the highest average low temperature is August (25°C).
The coldest month (with the lowest average low temperature) is January (2.6°C).
Average pressure in December
Hekinan, Japan
- Average pressure in December: 1018.4mbar
The month with the highest atmospheric pressure is November (1019.1mbar).
The month with the lowest atmospheric pressure is June (1009mbar).
Average wind speed in December
Hekinan, Japan
- Average wind speed in December: 14.1km/h
The windiest month (with the highest average wind speed) is January (14.3km/h).
The calmest month (with the lowest average wind speed) is July (9.1km/h).
Average humidity in December
Hekinan, Japan
- Average humidity in December: 72%
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is February (69%).
Average rainfall in December
Hekinan, Japan
- Average rainfall in December: 40mm
The wettest month (with the highest rainfall) is July (161mm).
The driest month (with the least rainfall) is January (27mm).
Average rainfall days in December
Hekinan, Japan
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is July (20.5 days).
The month with the least rainy days is November (8.6 days).
Average snowfall in December
Hekinan, Japan
- Average snowfall in December: 5mm
The month with the highest snowfall is January (15mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Hekinan, Japan
- Average snowfall days in December: 1.1 days
The month with the highest number of snowfall days is January (2.7 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in December
Hekinan, Japan
- Average sea temperature in December: 17.5°C
The best month for swimming (with the highest average sea temperature) is August (27.1°C).
The coldest months (with the lowest average sea temperature) are February and March (14.6°C).
Average daylight in December /
Average sunshine in December
Hekinan, Japan
- Average daylight in December: 9h and 5min
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 54min).
- Average sunshine in December: 6h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).
Average sunshine days in December
Hekinan, Japan
- Average sunshine days in December: 17.4 days
The month with the most sunshine days is November (18.6 days).
The month with the least sunshine days is July (7.8 days).
Average UV index in December
Hekinan, Japan
- Average UV index in December: 2
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in December
Hekinan, Japan
- Average cloud cover in December: 32
The month with the most cloud cover is July (Cloud cover 43).
The month with the least cloud cover is November (Cloud cover 31).
Average visibility in December
Hekinan, Japan
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, November and December (10km).
The months with the lowest visibility are April, May, June, July, August, September and October (9km).
Hekinan, Japan
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