December weather forecastOnomichi, Japan
December
Weather in December
The first month of the winter, December, is also a frosty month in Onomichi, Japan, with temperature in the range of an average high of 9.1°C (48.4°F) and an average low of 3.5°C (38.3°F).Temperature
The arrival of December corresponds with a shift in temperature, down from a refreshing 15°C (59°F) in November to a chilly 9.1°C (48.4°F). During the month of December, the temperature in Onomichi generally drops to a low average of 3.5°C (38.3°F).Humidity
In December, the average relative humidity in Onomichi is 77%.Rainfall
In Onomichi, in December, it is raining for 8.6 days, with typically 17mm (0.67") of accumulated precipitation. Throughout the year, there are 118.5 rainfall days, and 329mm (12.95") of precipitation is accumulated.Snowfall
Months with snowfall in Onomichi are January, February and December. December is the first month it typically snows in Onomichi. Throughout December, in the average 1.1 snowfall days, it receives 2mm (0.08") of snow. Throughout the year, in Onomichi, there are 6.5 snowfall days, and 13mm (0.51") of snow is accumulated.Sea temperature
In Onomichi, the average seawater temperature in December is 17.7°C (63.9°F).Note: The majority of individuals find it unpleasurable to swim in 17.7°C (63.9°F). It becomes progressively harder to manage one's breathing as the water temperature falls below 21°C (69.8°F).
Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 06:55 and sunset at 16:57. On the last day of the month, sunrise is at 07:13 and sunset at 17:07 JST.
Sunshine
In December, the average sunshine in Onomichi is 5h.UV index
The months with the lowest UV index in Onomichi are January, February and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 2 during December translates into the following guidance:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Around midday, solar radiation is most harmful; hence, exposure should be limited. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Onomichi, Japan
- Average high temperature in December: 9.1°C
The warmest month (with the highest average high temperature) is August (30.8°C).
The month with the lowest average high temperature is January (7.1°C).
- Average low temperature in December: 3.5°C
The month with the highest average low temperature is August (22.9°C).
The coldest month (with the lowest average low temperature) is January (1.3°C).
Average pressure in December
Onomichi, Japan
- Average pressure in December: 1020.3mbar
The month with the highest atmospheric pressure is January (1020.8mbar).
The month with the lowest atmospheric pressure is June (1008.4mbar).
Average wind speed in December
Onomichi, Japan
- Average wind speed in December: 10.4km/h
The windiest month (with the highest average wind speed) is January (10.5km/h).
The calmest month (with the lowest average wind speed) is June (6.9km/h).
Average humidity in December
Onomichi, Japan
- Average humidity in December: 77%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is May (71%).
Average rainfall in December
Onomichi, Japan
- Average rainfall in December: 17mm
The wettest month (with the highest rainfall) is July (69mm).
The driest month (with the least rainfall) is January (11mm).
Average rainfall days in December
Onomichi, Japan
- Average rainfall days in December: 8.6 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is January (6 days).
Average snowfall in December
Onomichi, Japan
- Average snowfall in December: 2mm
The month with the highest snowfall is January (6mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Onomichi, Japan
- Average snowfall days in December: 1.1 days
The month with the highest number of snowfall days is January (3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in December
Onomichi, Japan
- Average sea temperature in December: 17.7°C
The best month for swimming (with the highest average sea temperature) is August (27.2°C).
The coldest month (with the lowest average sea temperature) is February (13.7°C).
Average daylight in December /
Average sunshine in December
Onomichi, Japan
- Average daylight in December: 9h and 54min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in December
Onomichi, Japan
- Average sunshine days in December: 19.9 days
The month with the most sunshine days is May (21.6 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in December
Onomichi, 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
Onomichi, Japan
- Average cloud cover in December: 43
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Onomichi, Japan
- Average visibility in December: 9km
The month with the highest visibility is January (10km).
The months with the lowest visibility are February, March, April, May, June, July, August, September, October, November and December (9km).
