December weather forecastMuroran, Japan
December
Weather in December
December, the first month of the winter in Muroran, is still a cold month, with an average temperature varying between -4°C (24.8°F) and 0.5°C (32.9°F).Temperature
The average high-temperature decreases in December, shifting from a chilly 7°C (44.6°F) in November to a wintry 0.5°C (32.9°F). Muroran, in the month of December, notes an average low temperature of -4°C (24.8°F), indicating a small decrease from the daytime highs.Humidity
In Muroran, the average relative humidity in December is 80%.Rainfall
In December, in Muroran, the rain falls for 12.7 days. Throughout December, 66mm (2.6") of precipitation is accumulated. In Muroran, during the entire year, the rain falls for 173.2 days and collects up to 852mm (33.54") of precipitation.Snowfall
January through April, October through December are months with snowfall in Muroran, Japan. In Muroran, in December, snow falls for 19.4 days, with typically accumulated 144mm (5.67") of snow. In Muroran, Japan, during the entire year, snow falls for 89 days and aggregates up to 782mm (30.79") of snow.Daylight
The month with the shortest days in Muroran is December, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 06:45 and sunset at 16:04. On the last day of the month, sunrise is at 07:04 and sunset at 16:13 JST.
Sunshine
In December, the average sunshine in Muroran, Japan, is 3.3h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Muroran. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 1 during December translates into the following directions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Muroran, Japan
- Average high temperature in December: 0.5°C
The warmest month (with the highest average high temperature) is August (23°C).
The month with the lowest average high temperature is January (-1.9°C).
- Average low temperature in December: -4°C
The month with the highest average low temperature is August (17.8°C).
The coldest month (with the lowest average low temperature) is February (-7°C).
Average pressure in December
Muroran, Japan
- Average pressure in December: 1013.7mbar
The month with the highest atmospheric pressure is November (1016.6mbar).
The month with the lowest atmospheric pressure is July (1008.7mbar).
Average wind speed in December
Muroran, Japan
- Average wind speed in December: 19.2km/h
The windiest month (with the highest average wind speed) is December (19.2km/h).
The calmest month (with the lowest average wind speed) is July (10.2km/h).
Average humidity in December
Muroran, Japan
- Average humidity in December: 80%
The month with the highest relative humidity is July (88%).
The month with the lowest relative humidity is October (77%).
Average rainfall in December
Muroran, Japan
- Average rainfall in December: 66mm
The wettest month (with the highest rainfall) is August (115mm).
The driest month (with the least rainfall) is January (40mm).
Average rainfall days in December
Muroran, Japan
- Average rainfall days in December: 12.7 days
The month with the highest number of rainy days is August (19.7 days).
The month with the least rainy days is February (8.4 days).
Average snowfall in December
Muroran, Japan
- Average snowfall in December: 144mm
The month with the highest snowfall is February (218mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in December
Muroran, Japan
- Average snowfall days in December: 19.4 days
The month with the highest number of snowfall days is January (22.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Muroran, Japan
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 3h and 18min
The month with the most sunshine is April (Average sunshine: 8h and 18min).
The month with the least sunshine is February (Average sunshine: 2h and 48min).
Average sunshine days in December
Muroran, Japan
- Average sunshine days in December: 4.4 days
The month with the most sunshine days is May (14.2 days).
The month with the least sunshine days is December (4.4 days).
Average UV index in December
Muroran, Japan
- Average UV index in December: 1
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Muroran, Japan
- Average cloud cover in December: 66
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is October (Cloud cover 40).
Average visibility in December
Muroran, Japan
- Average visibility in December: 8km
The months with the highest visibility are March, April, May, September, October and November (9km).
The month with the lowest visibility is July (7km).
