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 weather is marked by a drop in the average high-temperature, falling from a refreshing 14.9°C (58.8°F) in November to a frosty 9.6°C (49.3°F). During the nights of December, Sayo records an average temperature of 4.7°C (40.5°F), a minor drop from daytime peaks.Humidity
In Sayo, Japan, the average relative humidity in December is 76%.Rainfall
In Sayo, Japan, in December, it is raining for 9.8 days, with typically 21mm (0.83") of accumulated precipitation. In Sayo, during the entire year, the rain falls for 138.1 days and collects up to 420mm (16.54") of precipitation.Snowfall
January, February and December are months with snowfall. December is the first month it typically snows in Sayo, Japan. Throughout December, in the average 2.9 snowfall days, it receives 3mm (0.12") of snow. Throughout the year, in Sayo, there are 12.4 snowfall days, and 21mm (0.83") of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 54min of daylight.On the first day of the month, sunrise is at 06:52 and sunset at 16:51. On the last day of December, sunrise is at 07:10 and sunset at 17:00 JST.
Sunshine
The average sunshine in December is 5.4h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 2 during December leads to these instructions:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Frequently asked questions
What are the temperatures in Sayo in December?
What is the average humidity in December in Sayo?
How much does it rain in Sayo in December?
When does it start to snow in Sayo?
What is the month with the shortest days in Sayo?
What is the average length of the day in December in Sayo?
What time are sunrise and sunset in December in Sayo?
How long on average sun shines in December in Sayo?
When is the lowest UV index in Sayo?
How high is the UV index in December in Sayo?
Average temperature in December
Sayo, Japan
- Average high temperature in December: 9.6°C
The warmest month (with the highest average high temperature) is August (29.2°C).
The month with the lowest average high temperature is January (6.9°C).
- Average low temperature in December: 4.7°C
The month with the highest average low temperature is August (23.8°C).
The coldest month (with the lowest average low temperature) is January (2.3°C).
Average pressure in December
Sayo, Japan
- Average pressure in December: 1019.8mbar
The month with the highest atmospheric pressure is February (1020.3mbar).
The month with the lowest atmospheric pressure is June (1008.6mbar).
Average wind speed in December
Sayo, Japan
- Average wind speed in December: 15km/h
The windiest month (with the highest average wind speed) is January (15.3km/h).
The calmest month (with the lowest average wind speed) is June (8.7km/h).
Average humidity in December
Sayo, Japan
- Average humidity in December: 76%
The month with the highest relative humidity is July (84%).
The months with the lowest relative humidity are March and April (73%).
Average rainfall in December
Sayo, Japan
- Average rainfall in December: 21mm
The wettest month (with the highest rainfall) is July (78mm).
The driest month (with the least rainfall) is November (11mm).
Average rainfall days in December
Sayo, Japan
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is November (7.8 days).
Average snowfall in December
Sayo, Japan
- Average snowfall in December: 3mm
The month with the highest snowfall is February (11mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Sayo, Japan
- Average snowfall days in December: 2.9 days
The month with the highest number of snowfall days is January (4.8 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
Sayo, 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: 5h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in December
Sayo, Japan
- Average sunshine days in December: 16.3 days
The month with the most sunshine days is March (20.1 days).
The month with the least sunshine days is July (8.6 days).
Average UV index in December
Sayo, 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
Sayo, Japan
- Average cloud cover in December: 40
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Sayo, Japan
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, August, September, October, November and December (10km).
The months with the lowest visibility are May, June and July (9km).
Sayo, Japan
Weather forecast for your location
2. Allow the app to use your location
