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 onset of December results in a decrease in the average high-temperature, receding from a mild 14.3°C (57.7°F) in November to a frosty 8°C (46.4°F). Katsumada, during the month of December, experiences an average low-temperature of 1.3°C (34.3°F).Humidity
The average relative humidity in December is 83%.Rainfall
In Katsumada, during December, the rain falls for 19.5 days and regularly aggregates up to 65mm (2.56") of precipitation. Throughout the year, there are 204 rainfall days, and 1096mm (43.15") of precipitation is accumulated.Snowfall
January through March and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 6.8 snowfall days, it receives 67mm (2.64") of snow. Throughout the year, there are 31.4 snowfall days, and 298mm (11.73") of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 48min of daylight.On the first day of the month, sunrise is at 06:53 and sunset at 16:51. On the last day of December, in Katsumada, sunrise is at 07:11 and sunset at 17:01 JST.
Sunshine
In December, the average sunshine is 4.6h.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 value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in December?
What is the average humidity in December?
How much does it rain in December?
When does it start snowing?
What is the month with the shortest days?
How many hours of daylight does Katsumada have in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Katsumada, Japan
- Average high temperature in December: 8°C
The warmest month (with the highest average high temperature) is August (30.2°C).
The month with the lowest average high temperature is January (5.8°C).
- Average low temperature in December: 1.3°C
The month with the highest average low temperature is August (21.6°C).
The coldest month (with the lowest average low temperature) is January (-0.8°C).
Average pressure in December
Katsumada, Japan
- Average pressure in December: 1019.8mbar
The month with the highest atmospheric pressure is February (1020.4mbar).
The month with the lowest atmospheric pressure is June (1008.5mbar).
Average wind speed in December
Katsumada, Japan
- Average wind speed in December: 8.1km/h
The windiest month (with the highest average wind speed) is January (8.7km/h).
The calmest month (with the lowest average wind speed) is June (6km/h).
Average humidity in December
Katsumada, Japan
- Average humidity in December: 83%
The month with the highest relative humidity is July (86%).
The months with the lowest relative humidity are April and May (75%).
Average rainfall in December
Katsumada, Japan
- Average rainfall in December: 65mm
The wettest month (with the highest rainfall) is July (175mm).
The driest month (with the least rainfall) is November (42mm).
Average rainfall days in December
Katsumada, Japan
- Average rainfall days in December: 19.5 days
The month with the highest number of rainy days is July (22.3 days).
The month with the least rainy days is May (14.3 days).
Average snowfall in December
Katsumada, Japan
- Average snowfall in December: 67mm
The month with the highest snowfall is January (122mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Katsumada, Japan
- Average snowfall days in December: 6.8 days
The month with the highest number of snowfall days is January (12.4 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
Katsumada, Japan
- Average daylight in December: 9h and 5min
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: 4h and 4min
The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in December
Katsumada, Japan
- Average sunshine days in December: 4.8 days
The month with the most sunshine days is May (15 days).
The month with the least sunshine days is December (4.8 days).
Average UV index in December
Katsumada, Japan
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in December
Katsumada, Japan
- Average cloud cover in December: 49
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is May (Cloud cover 37).
Average visibility in December
Katsumada, Japan
- Average visibility in December: 8km
The months with the highest visibility are February, March, April and November (9km).
The month with the lowest visibility is July (7km).
