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 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
December
Weather in December
Temperature
A shift in the average high-temperature occurs in December, reducing from a comfortable 16.3°C (61.3°F) in November to a cool 10.3°C (50.5°F). The average low-temperature of 4.8°C (40.6°F) is witnessed in Umi during December.Humidity
In Umi, the average relative humidity in December is 76%.Rainfall
In Umi, in December, it is raining for 16.5 days, with typically 73mm (2.87") of accumulated precipitation. In Umi, during the entire year, the rain falls for 183.3 days and collects up to 1145mm (45.08") of precipitation.Snowfall
Months with snowfall are January through March and December. December is the first month it typically snows. Throughout December, in the average 3.1 snowfall days, it receives 19mm (0.75") of snow. In Umi, during the entire year, snow falls for 11.9 days and aggregates up to 71mm (2.8") of snow.Daylight
With an average of 10h and 0min of daylight, December has the shortest days of the year in Umi.On the first day of the month, sunrise is at 07:04 and sunset at 17:09. On the last day of December, sunrise is at 07:22 and sunset at 17:19 JST.
Sunshine
In Umi, Japan, the average sunshine in December is 4h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index in Umi. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index of 2 during December translates into these guidelines:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures in Umi?
What is the average humidity in December in Umi?
How many days does it rain in December in Umi?
When does it start to snow in Umi?
What is the month with the shortest days in Umi?
What is the average length of the day in December in Umi?
What time are sunrise and sunset in December in Umi?
How long on average sun shines in December in Umi?
What is the month with the lowest UV index in Umi?
How high is the UV index in December in Umi?
Average temperature in December
Umi, Japan
- Average high temperature in December: 10.3°C
The warmest month (with the highest average high temperature) is August (31.1°C).
The month with the lowest average high temperature is January (8.3°C).
- Average low temperature in December: 4.8°C
The month with the highest average low temperature is August (23.5°C).
The coldest month (with the lowest average low temperature) is January (2.5°C).
Average pressure in December
Umi, Japan
- Average pressure in December: 1021.4mbar
The month with the highest atmospheric pressure is January (1022mbar).
The month with the lowest atmospheric pressure is June (1008.2mbar).
Average wind speed in December
Umi, Japan
- Average wind speed in December: 10.6km/h
The windiest months (with the highest average wind speed) are January and March (10.7km/h).
The calmest month (with the lowest average wind speed) is June (7.6km/h).
Average humidity in December
Umi, Japan
- Average humidity in December: 76%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is March (73%).
Average rainfall in December
Umi, Japan
- Average rainfall in December: 73mm
The wettest month (with the highest rainfall) is July (221mm).
The driest month (with the least rainfall) is January (51mm).
Average rainfall days in December
Umi, Japan
- Average rainfall days in December: 16.5 days
The month with the highest number of rainy days is July (22.5 days).
The month with the least rainy days is October (11.4 days).
Average snowfall in December
Umi, Japan
- Average snowfall in December: 19mm
The month with the highest snowfall is January (33mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Umi, Japan
- Average snowfall days in December: 3.1 days
The month with the highest number of snowfall days is January (5.7 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
Umi, Japan
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Umi, Japan
- Average sunshine days in December: 10.2 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is July (7.1 days).
Average UV index in December
Umi, 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
Umi, Japan
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and October (Cloud cover 39).
Average visibility in December
Umi, Japan
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, September, October, November and December (9km).
The months with the lowest visibility are June, July and August (8km).
