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
December brings a decrease in the average high-temperature, falling from November's frosty 8.7°C (47.7°F) to a wintry 2.8°C (37°F). December nights in Shiriuchi register a minor temperature decline, steadying at a freezing cold -0.6°C (30.9°F).Humidity
In Shiriuchi, the average relative humidity in December is 75%.Rainfall
In Shiriuchi, during December, the rain falls for 7.5 days and regularly aggregates up to 20mm (0.79") of precipitation. In Shiriuchi, during the entire year, the rain falls for 112.7 days and collects up to 203mm (7.99") of precipitation.Snowfall
Months with snowfall are January through April, November and December. In December, in Shiriuchi, Japan, it is snowing for 11.9 days. Throughout December, 31mm (1.22") of snow is accumulated. In Shiriuchi, during the entire year, snow falls for 57.1 days and aggregates up to 179mm (7.05") of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in Shiriuchi.On the first day of December, sunrise is at 06:45 and sunset at 16:09. On the last day of the month, sunrise is at 07:04 and sunset at 16:17 JST.
Sunshine
The average sunshine in December is 3.2h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Shiriuchi. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, a regular UV index of 1 translates into these guidelines:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Shiriuchi?
What is the average humidity in December in Shiriuchi?
How many days does it rain in December in Shiriuchi?
How much does it snow in Shiriuchi in December?
What is the month with the shortest days in Shiriuchi?
How many hours of daylight does Shiriuchi have in December?
When are sunrise and sunset in December in Shiriuchi?
How many hours of sunshine does Shiriuchi have in December?
What is the month with the lowest UV index in Shiriuchi?
What is the UV index intensity in December in Shiriuchi?
Average temperature in December
Shiriuchi, Japan
- Average high temperature in December: 2.8°C
The warmest month (with the highest average high temperature) is August (23.4°C).
The month with the lowest average high temperature is January (-0.1°C).
- Average low temperature in December: -0.6°C
The month with the highest average low temperature is August (19.6°C).
The coldest month (with the lowest average low temperature) is February (-3.5°C).
Average pressure in December
Shiriuchi, Japan
- Average pressure in December: 1014.1mbar
The month with the highest atmospheric pressure is November (1017mbar).
The month with the lowest atmospheric pressure is July (1008.8mbar).
Average wind speed in December
Shiriuchi, Japan
- Average wind speed in December: 24.3km/h
The windiest month (with the highest average wind speed) is December (24.3km/h).
The calmest month (with the lowest average wind speed) is July (12.2km/h).
Average humidity in December
Shiriuchi, Japan
- Average humidity in December: 75%
The month with the highest relative humidity is July (89%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Shiriuchi, Japan
- Average rainfall in December: 20mm
The wettest month (with the highest rainfall) is August (25mm).
The driest month (with the least rainfall) is May (12mm).
Average rainfall days in December
Shiriuchi, Japan
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is July (13 days).
The month with the least rainy days is January (4.8 days).
Average snowfall in December
Shiriuchi, Japan
- Average snowfall in December: 31mm
The month with the highest snowfall is February (52mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Shiriuchi, Japan
- Average snowfall days in December: 11.9 days
The month with the highest number of snowfall days is January (15.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Shiriuchi, Japan
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 3h and 1min
The month with the most sunshine is May (Average sunshine: 8h and 48min).
The months with the least sunshine are January and February (Average sunshine: 3h and 6min).
Average sunshine days in December
Shiriuchi, Japan
- Average sunshine days in December: 11 days
The months with the most sunshine days are May and October (17.3 days).
The month with the least sunshine days is February (9.3 days).
Average UV index in December
Shiriuchi, Japan
- Average UV index in December: 1
The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Shiriuchi, Japan
- Average cloud cover in December: 66
The month with the most cloud cover is January (Cloud cover 69).
The months with the least cloud cover are September and October (Cloud cover 38).
Average visibility in December
Shiriuchi, Japan
- Average visibility in December: 9km
The months with the highest visibility are September and October (10km).
The month with the lowest visibility is July (8km).
