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
The onset of December brings a small change in high-temperatures, falling from a refreshing 16°C (60.8°F) in November to a fresh 10.6°C (51.1°F). Yanai encounters a small divergence from daytime high temperatures, averaging a low-temperature of 6.5°C (43.7°F) during December nights.Humidity
The average relative humidity in December is 73%.Rainfall
In Yanai, in December, during 14.7 rainfall days, 68mm (2.68") of precipitation is typically accumulated. In Yanai, during the entire year, the rain falls for 168 days and collects up to 1163mm (45.79") of precipitation.Snowfall
January, February and December are months with snowfall. The month with the most snowfall is December, when snow falls for 1.8 days and typically aggregates up to 8mm (0.31") of snow.Sea temperature
In Yanai, the average seawater temperature in December is 17.2°C (63°F).Note: Most people find swimming in 17.2°C (63°F) unenjoyable. As the water temperature falls from 21°C (69.8°F) to 15°C (59°F), controlling one's breathing becomes harder.
Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year in Yanai.On the first day of the month, sunrise is at 06:58 and sunset at 17:02. On the last day of December, in Yanai, Japan, sunrise is at 07:16 and sunset at 17:12 JST.
Sunshine
In December, the average sunshine in Yanai is 5.3h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index in Yanai. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the average person.Note: During December, 2 as the daily maximum UV index converts into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Frequently asked questions
What is the temperature in December in Yanai?
What is the average humidity in December in Yanai?
How many days does it rain in December in Yanai?
When does it snow the most in Yanai?
When does it start to snow in Yanai?
How cold is the water in December in Yanai?
What is the month with the shortest days in Yanai?
How many hours of daylight does Yanai have in December?
When are sunrise and sunset in December in Yanai?
How many hours of sunshine does Yanai have in December?
When is the lowest UV index in Yanai?
What is the UV index intensity in December in Yanai?
Average temperature in December
Yanai, Japan
- Average high temperature in December: 10.6°C
The warmest month (with the highest average high temperature) is August (29.1°C).
The month with the lowest average high temperature is January (8.7°C).
- Average low temperature in December: 6.5°C
The month with the highest average low temperature is August (24.3°C).
The coldest month (with the lowest average low temperature) is January (4.3°C).
Average pressure in December
Yanai, Japan
- Average pressure in December: 1020.8mbar
The month with the highest atmospheric pressure is January (1021.3mbar).
The month with the lowest atmospheric pressure is June (1008.4mbar).
Average wind speed in December
Yanai, Japan
- Average wind speed in December: 14.1km/h
The windiest month (with the highest average wind speed) is January (14.5km/h).
The calmest month (with the lowest average wind speed) is June (8km/h).
Average humidity in December
Yanai, Japan
- Average humidity in December: 73%
The month with the highest relative humidity is July (85%).
The months with the lowest relative humidity are January, February and March (71%).
Average rainfall in December
Yanai, Japan
- Average rainfall in December: 68mm
The wettest month (with the highest rainfall) is July (213mm).
The driest month (with the least rainfall) is January (39mm).
Average rainfall days in December
Yanai, Japan
- Average rainfall days in December: 14.7 days
The month with the highest number of rainy days is July (20.5 days).
The month with the least rainy days is October (10.5 days).
Average snowfall in December
Yanai, Japan
- Average snowfall in December: 8mm
The month with the highest snowfall is December (8mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Yanai, Japan
- Average snowfall days in December: 1.8 days
The month with the highest number of snowfall days is January (3.3 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
Yanai, Japan
- Average sea temperature in December: 17.2°C
The best month for swimming (with the highest average sea temperature) is August (26.8°C).
The coldest month (with the lowest average sea temperature) is February (12.9°C).
Average daylight in December /
Average sunshine in December
Yanai, Japan
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in December
Yanai, Japan
- Average sunshine days in December: 11.9 days
The month with the most sunshine days is May (18.6 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in December
Yanai, Japan
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in December
Yanai, Japan
- Average cloud cover in December: 40
The months with the most cloud cover are January and June (Cloud cover 43).
The months with the least cloud cover are August, October and November (Cloud cover 32).
Average visibility in December
Yanai, Japan
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, August, September, October, November and December (10km).
The months with the lowest visibility are April, May, June and July (9km).
Yanai, Japan
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