December weather forecastIwakura, Japan
December
Weather in December
The first month of the winter, December, is still a chilly month in Iwakura, Japan, with temperature in the range of an average high of 8.9°C (48°F) and an average low of 2.6°C (36.7°F).Temperature
December weather is marked by a drop in the average high-temperature, falling from a moderate 15.1°C (59.2°F) in November to a chilly 8.9°C (48°F). In the month of December, an average of 2.6°C (36.7°F) marks the low-temperature.Humidity
The average relative humidity in December is 77%.Rainfall
In December, the rain falls for 7.2 days. Throughout December, 28mm (1.1") of precipitation is accumulated. Throughout the year, in Iwakura, there are 147.8 rainfall days, and 833mm (32.8") of precipitation is accumulated.Snowfall
January, February and December are months with snowfall in Iwakura. December is the first month it typically snows in Iwakura. Throughout December, in the average 1.1 snowfall days, it receives 8mm (0.31") of snow. Throughout the year, there are 4.3 snowfall days, and 27mm (1.06") of snow is accumulated.Daylight
The month with the shortest days in Iwakura is December, with an average of 9h and 48min of daylight.On the first day of December, sunrise is at 06:42 and sunset at 16:40. On the last day of the month, sunrise is at 07:00 and sunset at 16:50 JST.
Sunshine
In Iwakura, Japan, the average sunshine in December is 5.9h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 2 during December translates into these guidelines:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. To protect against the Sun's most potent rays, avoid direct exposure around midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Iwakura, Japan
- Average high temperature in December: 8.9°C
The warmest month (with the highest average high temperature) is August (32°C).
The month with the lowest average high temperature is January (6.6°C).
- Average low temperature in December: 2.6°C
The month with the highest average low temperature is August (23.2°C).
The coldest month (with the lowest average low temperature) is January (-0.3°C).
Average pressure in December
Iwakura, Japan
- Average pressure in December: 1018.5mbar
The month with the highest atmospheric pressure is November (1019.3mbar).
The month with the lowest atmospheric pressure is June (1009.1mbar).
Average wind speed in December
Iwakura, Japan
- Average wind speed in December: 7.8km/h
The windiest month (with the highest average wind speed) is March (8.5km/h).
The calmest month (with the lowest average wind speed) is July (6.3km/h).
Average humidity in December
Iwakura, Japan
- Average humidity in December: 77%
The month with the highest relative humidity is July (79%).
The month with the lowest relative humidity is May (70%).
Average rainfall in December
Iwakura, Japan
- Average rainfall in December: 28mm
The wettest month (with the highest rainfall) is July (164mm).
The driest month (with the least rainfall) is January (19mm).
Average rainfall days in December
Iwakura, Japan
- Average rainfall days in December: 7.2 days
The month with the highest number of rainy days is July (20.8 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in December
Iwakura, Japan
- Average snowfall in December: 8mm
The month with the highest snowfall is January (10mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Iwakura, Japan
- Average snowfall days in December: 1.1 days
The month with the highest number of snowfall days is January (1.8 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
Iwakura, Japan
- Average daylight in December: 9h and 48min
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 48min).
- Average sunshine in December: 5h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days in December
Iwakura, Japan
- Average sunshine days in December: 22 days
The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is July (7.4 days).
Average UV index in December
Iwakura, 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, February and December (UV index 2).
Average cloud cover in December
Iwakura, Japan
- Average cloud cover in December: 37
The month with the most cloud cover is July (Cloud cover 48).
The month with the least cloud cover is November (Cloud cover 32).
Average visibility in December
Iwakura, Japan
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, August, October, November and December (9km).
The months with the lowest visibility are June, July and September (8km).
