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
The shift to December brings a decrease in the average high-temperature, falling from a comfortable 16.4°C (61.5°F) in November to a cool 10.5°C (50.9°F). December nights witness a mild cool down to an average low of 5.8°C (42.4°F).Humidity
In Gannosu, Japan, the average relative humidity in December is 73%.Rainfall
In Gannosu, in December, it is raining for 17.3 days, with typically 70mm (2.76") of accumulated precipitation. Throughout the year, there are 178 rainfall days, and 1063mm (41.85") of precipitation is accumulated.Snowfall
January through March and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 2.5 snowfall days, it receives 12mm (0.47") of snow. Throughout the year, there are 10.4 snowfall days, and 48mm (1.89") of snow is accumulated.Daylight
With an average of 10h and 0min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 07:04 and sunset at 17:09. On the last day of the month, sunrise is at 07:22 and sunset at 17:20 JST.
Sunshine
The average sunshine in December is 4.3h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in December?
What is the average humidity in December?
How much does it rain in December?
When does it start snowing?
What is the month with the shortest days?
How many hours of daylight does Gannosu have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Gannosu, Japan
- Average high temperature in December: 10.5°C
The warmest month (with the highest average high temperature) is August (30.3°C).
The month with the lowest average high temperature is January (8.4°C).
- Average low temperature in December: 5.8°C
The month with the highest average low temperature is August (24.1°C).
The coldest month (with the lowest average low temperature) is January (3.8°C).
Average pressure in December
Gannosu, Japan
- Average pressure in December: 1021.5mbar
The month with the highest atmospheric pressure is January (1022.1mbar).
The month with the lowest atmospheric pressure is June (1008.2mbar).
Average wind speed in December
Gannosu, Japan
- Average wind speed in December: 14.1km/h
The windiest month (with the highest average wind speed) is January (14.2km/h).
The calmest month (with the lowest average wind speed) is June (9.4km/h).
Average humidity in December
Gannosu, Japan
- Average humidity in December: 73%
The month with the highest relative humidity is July (84%).
The months with the lowest relative humidity are January, February and March (72%).
Average rainfall in December
Gannosu, Japan
- Average rainfall in December: 70mm
The wettest month (with the highest rainfall) is July (193mm).
The driest month (with the least rainfall) is January (52mm).
Average rainfall days in December
Gannosu, Japan
- Average rainfall days in December: 17.3 days
The month with the highest number of rainy days is July (20.9 days).
The month with the least rainy days is May (10.8 days).
Average snowfall in December
Gannosu, Japan
- Average snowfall in December: 12mm
The month with the highest snowfall is January (22mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Gannosu, Japan
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (4.9 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
Gannosu, Japan
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in December
Gannosu, Japan
- Average sunshine days in December: 9.8 days
The month with the most sunshine days is May (18.6 days).
The month with the least sunshine days is July (8.4 days).
Average UV index in December
Gannosu, 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
Gannosu, Japan
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Gannosu, Japan
- Average visibility in December: 10km
The months with the highest visibility are March, September, October, November and December (10km).
The months with the lowest visibility are January, February, April, May, June, July and August (9km).
