December weather forecastRoppongi, Japan
December
Weather in December
December, the first month of the winter in Roppongi, is still a cool month, with an average temperature varying between 5.9°C (42.6°F) and 11.2°C (52.2°F).Temperature
A change in temperatures is noted as November gives way to December, with average highs reducing from a refreshing 16.5°C (61.7°F) to a cool 11.2°C (52.2°F). In Roppongi, the average temperature during the nights of December drops to an icy 5.9°C (42.6°F).Humidity
In December, the average relative humidity in Roppongi is 63%.Rainfall
In December, in Roppongi, the rain falls for 5.9 days. Throughout December, 12mm (0.47") of precipitation is accumulated. Throughout the year, there are 125.3 rainfall days, and 359mm (14.13") of precipitation is accumulated.Snowfall
March through December are months without snowfall in Roppongi.Daylight
With an average of 9h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 06:32 and sunset at 16:27. On the last day of December, in Roppongi, sunrise is at 06:50 and sunset at 16:37 JST.
Sunshine
In Roppongi, the average sunshine in December is 6.2h.UV index
In Roppongi, the average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 3 during December translates into these guidelines:
Adopt protective measures - Suggestions to resist sunburn are offered. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Roppongi, Japan
- Average high temperature in December: 11.2°C
The warmest month (with the highest average high temperature) is August (30.6°C).
The month with the lowest average high temperature is January (8.8°C).
- Average low temperature in December: 5.9°C
The month with the highest average low temperature is August (24.9°C).
The coldest month (with the lowest average low temperature) is January (3°C).
Average pressure in December
Roppongi, Japan
- Average pressure in December: 1016.2mbar
The month with the highest atmospheric pressure is November (1018.1mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in December
Roppongi, Japan
- Average wind speed in December: 13.5km/h
The windiest month (with the highest average wind speed) is April (15.6km/h).
The calmest month (with the lowest average wind speed) is November (12.3km/h).
Average humidity in December
Roppongi, Japan
- Average humidity in December: 63%
The month with the highest relative humidity is July (79%).
The month with the lowest relative humidity is January (60%).
Average rainfall in December
Roppongi, Japan
- Average rainfall in December: 12mm
The wettest month (with the highest rainfall) is September (54mm).
The driest month (with the least rainfall) is February (10mm).
Average rainfall days in December
Roppongi, Japan
- Average rainfall days in December: 5.9 days
The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in December
Roppongi, Japan
- Average snowfall in December: 0mm
The month with the highest snowfall is February (4mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in December
Roppongi, Japan
- Average snowfall days in December: 0.2 days
The month with the highest number of snowfall days is February (1.2 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
Roppongi, Japan
- Average daylight in December: 9h and 48min
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: 6h and 12min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days in December
Roppongi, Japan
- Average sunshine days in December: 24.3 days
The month with the most sunshine days is January (25.4 days).
The month with the least sunshine days is June (11.5 days).
Average UV index in December
Roppongi, Japan
- Average UV index in December: 3
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in December
Roppongi, Japan
- Average cloud cover in December: 30
The months with the most cloud cover are June and October (Cloud cover 44).
The month with the least cloud cover is January (Cloud cover 28).
Average visibility in December
Roppongi, Japan
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).
