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
Weather in December
Temperature
December comes with a decrease in the average high-temperature, falling from a wintry 5.9°C (42.6°F) in November to a still cold 0.1°C (32.2°F). In Rumoi, December nights maintain a consistent temperature, with an average low of -3.5°C (25.7°F).Humidity
The average relative humidity in December in Rumoi, Japan, is 81%.Rainfall
In Rumoi, during December, the rain falls for 5 days and regularly aggregates up to 70mm (2.76") of precipitation. In Rumoi, Japan, during the entire year, the rain falls for 138.6 days and collects up to 792mm (31.18") of precipitation.Snowfall
January through May, October through December are months with snowfall. December is the month with the most snowfall. Snow falls for 18 days and accumulates 260mm (10.24") of snow.Daylight
December has the shortest days of the year in Rumoi, with an average of 9h and 0min of daylight.On the first day of December, sunrise is at 06:47 and sunset at 15:57. On the last day of the month, sunrise is at 07:07 and sunset at 16:05 JST.
Sunshine
The months with the least sunshine are January and December, with an average of 1.4h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Rumoi. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 1 in December converts into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
How cold is it in Rumoi in December?
What is the average humidity in December in Rumoi?
How much does it rain in Rumoi in December?
What is the snowiest month in Rumoi?
How many days does it snow in December in Rumoi?
What is the month with the shortest days in Rumoi?
What is the average length of the day in December in Rumoi?
When are sunrise and sunset in December in Rumoi?
What is the month with the least sunshine in Rumoi?
How many hours of sunshine does Rumoi have in December?
What are the months with the lowest UV index in Rumoi?
How high is the UV index in December in Rumoi?
Average temperature in December
Rumoi, Japan
- Average high temperature in December: 0.1°C
The warmest month (with the highest average high temperature) is August (22.9°C).
The month with the lowest average high temperature is January (-2.3°C).
- Average low temperature in December: -3.5°C
The month with the highest average low temperature is August (17.8°C).
The coldest month (with the lowest average low temperature) is February (-6.5°C).
Average pressure in December
Rumoi, Japan
- Average pressure in December: 1012.2mbar
The month with the highest atmospheric pressure is November (1015.4mbar).
The month with the lowest atmospheric pressure is July (1008.4mbar).
Average wind speed in December
Rumoi, Japan
- Average wind speed in December: 22.6km/h
The windiest month (with the highest average wind speed) is December (22.6km/h).
The calmest month (with the lowest average wind speed) is July (10.3km/h).
Average humidity in December
Rumoi, Japan
- Average humidity in December: 81%
The month with the highest relative humidity is July (87%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Rumoi, Japan
- Average rainfall in December: 70mm
The wettest month (with the highest rainfall) is August (136mm).
The driest month (with the least rainfall) is February (35mm).
Average rainfall days in December
Rumoi, Japan
- Average rainfall days in December: 5 days
The month with the highest number of rainy days is August (18 days).
The month with the least rainy days is January (2.3 days).
Average snowfall in December
Rumoi, Japan
- Average snowfall in December: 260mm
The month with the highest snowfall is December (260mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Rumoi, Japan
- Average snowfall days in December: 18 days
The month with the highest number of snowfall days is January (21.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rumoi, Japan
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 1h and 2min
The months with the most sunshine are May and August (Average sunshine: 8h and 48min).
The months with the least sunshine are January and December (Average sunshine: 1h and 24min).
Average sunshine days in December
Rumoi, Japan
- Average sunshine days in December: 5.1 days
The month with the most sunshine days is May (15.9 days).
The month with the least sunshine days is December (5.1 days).
Average UV index in December
Rumoi, Japan
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Rumoi, Japan
- Average cloud cover in December: 86
The month with the most cloud cover is January (Cloud cover 88).
The month with the least cloud cover is September (Cloud cover 37).
Average visibility in December
Rumoi, Japan
- Average visibility in December: 8km
The months with the highest visibility are September and October (10km).
The months with the lowest visibility are January, February and December (8km).
Rumoi, Japan
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