December weather forecastOyama, Japan
December weather for Oyama, Japan: December, the first month of the winter in Oyama, is still a chilly month, with an average temperature varying between 9.5°C (49.1°F) and 3°C (37.4°F). The month with the shortest days in Oyama is December, with an average of 9h and 42min of daylight.
December
Weather in December
December, the first month of the winter in Oyama, is still a chilly month, with an average temperature varying between 9.5°C (49.1°F) and 3°C (37.4°F).Temperature
A decrease in the average high-temperature is observed during December, shifting from a refreshing 14.9°C (58.8°F) in November to a frosty 9.5°C (49.1°F). December's nights observe an average temperature of 3°C (37.4°F).Humidity
In Oyama, Japan, the average relative humidity in December is 64%.Rainfall
December is the month with the least rainfall. Rain falls for 3.3 days and accumulates 3mm (0.12") of precipitation.Snowfall
April through December are months without snowfall in Oyama, Japan.Daylight
With an average of 9h and 42min of daylight, December has the shortest days of the year.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 16:35 JST.
Sunshine
In Oyama, the average sunshine in December is 6.7h.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 of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 2 during December translates into the following recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Always opt for UVA and UVB-resistant sunglasses on radiant days. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Oyama, Japan
- Average high temperature in December: 9.5°C
The warmest month (with the highest average high temperature) is August (31.2°C).
The month with the lowest average high temperature is January (7.1°C).
- Average low temperature in December: 3°C
The month with the highest average low temperature is August (23.3°C).
The coldest month (with the lowest average low temperature) is January (0.2°C).
Average pressure in December
Oyama, Japan
- Average pressure in December: 1016.5mbar
The month with the highest atmospheric pressure is November (1018.5mbar).
The month with the lowest atmospheric pressure is June (1009.3mbar).
Average wind speed in December
Oyama, Japan
- Average wind speed in December: 8.4km/h
The windiest month (with the highest average wind speed) is April (9.5km/h).
The calmest month (with the lowest average wind speed) is November (7km/h).
Average humidity in December
Oyama, Japan
- Average humidity in December: 64%
The month with the highest relative humidity is July (78%).
The month with the lowest relative humidity is January (61%).
Average rainfall in December
Oyama, Japan
- Average rainfall in December: 3mm
The wettest month (with the highest rainfall) is July (35mm).
The driest month (with the least rainfall) is December (3mm).
Average rainfall days in December
Oyama, Japan
- Average rainfall days in December: 3.3 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is December (3.3 days).
Average snowfall in December
Oyama, Japan
- Average snowfall in December: 0mm
The month with the highest snowfall is February (4mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in December
Oyama, Japan
- Average snowfall days in December: 0.2 days
The month with the highest number of snowfall days is February (1.9 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
Oyama, 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 42min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 18min).
Average sunshine days in December
Oyama, Japan
- Average sunshine days in December: 27.5 days
The month with the most sunshine days is December (27.5 days).
The month with the least sunshine days is July (7.5 days).
Average UV index in December
Oyama, 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
Oyama, 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
Oyama, 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).
