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
Stepping into December, Itoigawa observes a temperature decline, with the average high falling from November's cool 11.8°C (53.2°F) to an icy 5.8°C (42.4°F). In Itoigawa, the nighttime temperature in December descends gently to an average of 1.1°C (34°F).Humidity
In December, the average relative humidity is 82%.Rainfall
In Itoigawa, Japan, in December, during 20 rainfall days, 141mm (5.55") of precipitation is typically accumulated. Throughout the year, there are 200.6 rainfall days, and 1190mm (46.85") of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Itoigawa, in December, during 10.1 snowfall days, 267mm (10.51") of snow is typically accumulated. In Itoigawa, Japan, during the entire year, snow falls for 50.4 days and aggregates up to 1229mm (48.39") of snow.Daylight
With an average of 9h and 42min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 06:43 and sunset at 16:31. On the last day of December, sunrise is at 07:01 and sunset at 16:41 JST.
Sunshine
In Itoigawa, the average sunshine in December is 3.4h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.Note: A maximum high UV index of 1 in December translates into the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. 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
Is it cold in Itoigawa during December?
What is the average humidity in December in Itoigawa?
How much does it rain in Itoigawa in December?
How many days does it snow in December in Itoigawa?
What is the month with the shortest days in Itoigawa?
What is the average length of the day in December in Itoigawa?
What time are sunrise and sunset in December in Itoigawa?
How long on average sun shines in December in Itoigawa?
When is the lowest UV index in Itoigawa?
What is the UV index intensity in December in Itoigawa?
Average temperature in December
Itoigawa, Japan
- Average high temperature in December: 5.8°C
The warmest month (with the highest average high temperature) is August (27.8°C).
The month with the lowest average high temperature is January (2.8°C).
- Average low temperature in December: 1.1°C
The month with the highest average low temperature is August (20.9°C).
The coldest month (with the lowest average low temperature) is February (-1.9°C).
Average pressure in December
Itoigawa, Japan
- Average pressure in December: 1017.6mbar
The month with the highest atmospheric pressure is November (1019.2mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in December
Itoigawa, Japan
- Average wind speed in December: 15.4km/h
The windiest months (with the highest average wind speed) are January and December (15.4km/h).
The calmest months (with the lowest average wind speed) are July and August (7.7km/h).
Average humidity in December
Itoigawa, Japan
- Average humidity in December: 82%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is May (74%).
Average rainfall in December
Itoigawa, Japan
- Average rainfall in December: 141mm
The wettest month (with the highest rainfall) is July (142mm).
The driest month (with the least rainfall) is May (57mm).
Average rainfall days in December
Itoigawa, Japan
- Average rainfall days in December: 20 days
The month with the highest number of rainy days is July (21.6 days).
The month with the least rainy days is February (10.3 days).
Average snowfall in December
Itoigawa, Japan
- Average snowfall in December: 267mm
The month with the highest snowfall is January (466mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Itoigawa, Japan
- Average snowfall days in December: 10.1 days
The month with the highest number of snowfall days is January (17.4 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
Itoigawa, Japan
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 3h 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: 2h and 42min).
Average sunshine days in December
Itoigawa, Japan
- Average sunshine days in December: 5 days
The month with the most sunshine days is May (15.1 days).
The month with the least sunshine days is January (4.3 days).
Average UV index in December
Itoigawa, 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
Itoigawa, Japan
- Average cloud cover in December: 66
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is May (Cloud cover 35).
Average visibility in December
Itoigawa, Japan
- Average visibility in December: 9km
The months with the highest visibility are October and November (10km).
The month with the lowest visibility is January (8km).
