December weather forecastKoga, Japan
December
Weather in December
The first month of the winter, December, is still a chilly month in Koga, Japan, with an average temperature ranging between max 9.6°C (49.3°F) and min 3.5°C (38.3°F).Temperature
Koga's December weather shows a moderate shift in high-temperatures, falling from November's mild 15.4°C (59.7°F) to a chilly 9.6°C (49.3°F). Koga usually reports an average low-temperature of 3.5°C (38.3°F) during the month of December.Humidity
In December, the average relative humidity in Koga is 63%.Rainfall
December is the month with the least rainfall. Rain falls for 7.3 days and accumulates 27mm (1.06") of precipitation.Snowfall
January through March, November and December are months with snowfall. In Koga, in December, snow falls for 0.4 days, with typically accumulated 1mm (0.04") of snow. In Koga, during the entire year, snow falls for 4.5 days and aggregates up to 61mm (2.4") of snow.Daylight
December has the shortest days of the year, with an average of 9h and 42min of daylight.On the first day of December, sunrise is at 06:33 and sunset at 16:26. On the last day of the month, sunrise is at 06:51 and sunset at 16:36 JST.
Sunshine
The average sunshine in December is 6.5h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the UV index of 2 transforms into the following advice:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Be alert to the fact! The reflection from snow can nearly 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
Koga, Japan
- Average high temperature in December: 9.6°C
The warmest month (with the highest average high temperature) is August (31.8°C).
The month with the lowest average high temperature is January (7.6°C).
- Average low temperature in December: 3.5°C
The month with the highest average low temperature is August (23.8°C).
The coldest month (with the lowest average low temperature) is January (0.8°C).
Average pressure in December
Koga, Japan
- Average pressure in December: 1016.5mbar
The month with the highest atmospheric pressure is November (1018.4mbar).
The month with the lowest atmospheric pressure is June (1009.3mbar).
Average wind speed in December
Koga, Japan
- Average wind speed in December: 9.1km/h
The windiest month (with the highest average wind speed) is April (10.2km/h).
The calmest month (with the lowest average wind speed) is November (7.6km/h).
Average humidity in December
Koga, Japan
- Average humidity in December: 63%
The month with the highest relative humidity is July (76%).
The month with the lowest relative humidity is January (60%).
Average rainfall in December
Koga, Japan
- Average rainfall in December: 27mm
The wettest month (with the highest rainfall) is October (120mm).
The driest month (with the least rainfall) is December (27mm).
Average rainfall days in December
Koga, Japan
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is July (22.1 days).
The month with the least rainy days is January (5.6 days).
Average snowfall in December
Koga, Japan
- Average snowfall in December: 1mm
The month with the highest snowfall is February (38mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Koga, Japan
- Average snowfall days in December: 0.4 days
The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Koga, Japan
- Average daylight in December: 9h and 42min
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: 6h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The months with the least sunshine are February and November (Average sunshine: 6h and 12min).
Average sunshine days in December
Koga, Japan
- Average sunshine days in December: 22.5 days
The month with the most sunshine days is January (23.8 days).
The month with the least sunshine days is July (5.8 days).
Average UV index in December
Koga, 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 and December (UV index 2).
Average cloud cover in December
Koga, Japan
- Average cloud cover in December: 27
The month with the most cloud cover is June (Cloud cover 46).
The month with the least cloud cover is January (Cloud cover 25).
Average visibility in December
Koga, Japan
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, November and December (10km).
The months with the lowest visibility are April, May, June, July, August, September and October (9km).
