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
With December's onset, the weather shows a temperature decrease, transitioning from a refreshing 13.3°C (55.9°F) in November to a chilly 7.8°C (46°F). An average low-temperature of 2.1°C (35.8°F) is noted in Iwaki, Japan, during the month of December.Humidity
In December, the average relative humidity in Iwaki is 72%.Rainfall
In Iwaki, during December, the rain falls for 13.5 days and regularly aggregates up to 48mm (1.89") of precipitation. Throughout the year, in Iwaki, Japan, there are 195.5 rainfall days, and 1085mm (42.72") of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. In Iwaki, in December, during 2.3 snowfall days, 9mm (0.35") of snow is typically accumulated. Throughout the year, there are 17.8 snowfall days, and 159mm (6.26") of snow is accumulated.Daylight
The month with the shortest days in Iwaki is December, with an average of 9h and 42min of daylight.On the first day of December in Iwaki, Japan, sunrise is at 06:31 and sunset at 16:19. On the last day of the month, sunrise is at 06:49 and sunset at 16:29 JST.
Sunshine
The average sunshine in December is 6h.UV index
January through March and December, with an average maximum UV index of 2, are months with the lowest UV index in Iwaki. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 2 suggests this advice:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. To guard against the harmful effects of the Sun, minimize exposure during midday. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures in Iwaki?
What is the average humidity in December in Iwaki?
How many days does it rain in December in Iwaki?
How much does it snow in Iwaki in December?
What is the month with the shortest days in Iwaki?
How many hours of daylight does Iwaki have in December?
When are sunrise and sunset in December in Iwaki?
How many hours of sunshine does Iwaki have in December?
When is the lowest UV index in Iwaki?
How high is the UV index in December in Iwaki?
Average temperature in December
Iwaki, Japan
- Average high temperature in December: 7.8°C
The warmest month (with the highest average high temperature) is August (27.5°C).
The month with the lowest average high temperature is January (5.1°C).
- Average low temperature in December: 2.1°C
The month with the highest average low temperature is August (20.8°C).
The coldest month (with the lowest average low temperature) is January (-1.1°C).
Average pressure in December
Iwaki, Japan
- Average pressure in December: 1016.3mbar
The month with the highest atmospheric pressure is November (1018.5mbar).
The month with the lowest atmospheric pressure is June (1009.4mbar).
Average wind speed in December
Iwaki, Japan
- Average wind speed in December: 15.8km/h
The windiest month (with the highest average wind speed) is January (16.5km/h).
The calmest month (with the lowest average wind speed) is July (9.4km/h).
Average humidity in December
Iwaki, Japan
- Average humidity in December: 72%
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is January (70%).
Average rainfall in December
Iwaki, Japan
- Average rainfall in December: 48mm
The wettest month (with the highest rainfall) is October (152mm).
The driest months (with the least rainfall) are January and February (45mm).
Average rainfall days in December
Iwaki, Japan
- Average rainfall days in December: 13.5 days
The month with the highest number of rainy days is July (23.9 days).
The month with the least rainy days is February (10.8 days).
Average snowfall in December
Iwaki, Japan
- Average snowfall in December: 9mm
The month with the highest snowfall is February (67mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Iwaki, Japan
- Average snowfall days in December: 2.3 days
The month with the highest number of snowfall days is January (6.4 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
Iwaki, 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: 6h and 0min
The month with the most sunshine is August (Average sunshine: 9h and 24min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).
Average sunshine days in December
Iwaki, Japan
- Average sunshine days in December: 13.6 days
The month with the most sunshine days is November (15.4 days).
The month with the least sunshine days is July (3.8 days).
Average UV index in December
Iwaki, Japan
- Average UV index in December: 2
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).
Average cloud cover in December
Iwaki, Japan
- Average cloud cover in December: 34
The month with the most cloud cover is July (Cloud cover 49).
The month with the least cloud cover is January (Cloud cover 33).
Average visibility in December
Iwaki, Japan
- Average visibility in December: 10km
The months with the highest visibility are November and December (10km).
The month with the lowest visibility is July (8km).
