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 from November to December involves a decrease in the average high-temperature, dropping from a cool 12°C (53.6°F) to a wintry 5.7°C (42.3°F). A modest decline from daytime high temperatures is noticed in December, marking the average low at a still icy 0.8°C (33.4°F).Humidity
The average relative humidity in December in Ioridani is 81%.Rainfall
In December, the rain falls for 21.5 days. Throughout December, 161mm (6.34") of precipitation is accumulated. In Ioridani, during the entire year, the rain falls for 218.8 days and collects up to 1305mm (51.38") of precipitation.Snowfall
January through April and December are months with snowfall in Ioridani. December is the first month it typically snows in Ioridani. Throughout December, in the average 10.3 snowfall days, it receives 322mm (12.68") of snow. In Ioridani, Japan, during the entire year, snow falls for 48 days and aggregates up to 1270mm (50") of snow.Daylight
The month with the shortest days is December, with an average of 9h and 42min of daylight.On the first day of December, sunrise is at 06:44 and sunset at 16:35. On the last day of the month, sunrise is at 07:02 and sunset at 16:45 JST.
Sunshine
The average sunshine in December is 3.8h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Ioridani. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Experience reduced UV exposure by about half when donning a wide-brim hat. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Ioridani?
What is the average humidity in December in Ioridani?
How much does it rain in Ioridani in December?
When does it start to snow in Ioridani?
What is the month with the shortest days in Ioridani?
How many hours of daylight does Ioridani have in December?
When is the sunrise / sunset in December in Ioridani?
How many hours of sunshine does Ioridani have in December?
When is the lowest UV index in Ioridani?
What is the UV index intensity in December in Ioridani?
Average temperature in December
Ioridani, Japan
- Average high temperature in December: 5.7°C
The warmest month (with the highest average high temperature) is August (27.9°C).
The month with the lowest average high temperature is January (2.6°C).
- Average low temperature in December: 0.8°C
The month with the highest average low temperature is August (21.2°C).
The coldest month (with the lowest average low temperature) is February (-2.8°C).
Average pressure in December
Ioridani, Japan
- Average pressure in December: 1018.1mbar
The months with the highest atmospheric pressure are February and November (1019.4mbar).
The month with the lowest atmospheric pressure is June (1009.1mbar).
Average wind speed in December
Ioridani, Japan
- Average wind speed in December: 12km/h
The windiest month (with the highest average wind speed) is December (12km/h).
The calmest months (with the lowest average wind speed) are June and August (7.4km/h).
Average humidity in December
Ioridani, Japan
- Average humidity in December: 81%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is May (71%).
Average rainfall in December
Ioridani, Japan
- Average rainfall in December: 161mm
The wettest month (with the highest rainfall) is July (179mm).
The driest month (with the least rainfall) is May (64mm).
Average rainfall days in December
Ioridani, Japan
- Average rainfall days in December: 21.5 days
The month with the highest number of rainy days is July (24.8 days).
The month with the least rainy days is May (14.4 days).
Average snowfall in December
Ioridani, Japan
- Average snowfall in December: 322mm
The month with the highest snowfall is January (469mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Ioridani, Japan
- Average snowfall days in December: 10.3 days
The month with the highest number of snowfall days is January (17.5 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
Ioridani, Japan
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Ioridani, Japan
- Average sunshine days in December: 4 days
The month with the most sunshine days is May (13.6 days).
The month with the least sunshine days is January (3.5 days).
Average UV index in December
Ioridani, Japan
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Ioridani, Japan
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is May (Cloud cover 33).
Average visibility in December
Ioridani, Japan
- Average visibility in December: 9km
The month with the highest visibility is October (10km).
The month with the lowest visibility is January (8km).
