December weather forecastTenno, Japan
December weather for Tenno, Japan: In Tenno, during December, the rain falls for 15.9 days and regularly aggregates up to 138mm (5.43") of precipitation. December, the first month of the winter in Tenno, is also a wintry month, with temperature in the range of an average low of 1.7°C (35.1°F) and an average high of 5°C (41°F).
December
Weather in December
December, the first month of the winter in Tenno, is also a wintry month, with temperature in the range of an average low of 1.7°C (35.1°F) and an average high of 5°C (41°F).Temperature
The onset of December results in a decrease in the average high-temperature, receding from a fresh 11°C (51.8°F) in November to a cold 5°C (41°F). During the month of December, Tenno's average nighttime temperature closely mirrors its daytime counterpart, at 1.7°C (35.1°F).Humidity
In December, the average relative humidity in Tenno, Japan, is 78%.Rainfall
December is the month with the most rainfall in Tenno. Rain falls for 15.9 days and accumulates 138mm (5.43") of precipitation.Snowfall
Months with snowfall in Tenno are January through April, November and December. In Tenno, in December, snow falls for 13.5 days, with typically accumulated 199mm (7.83") of snow. In Tenno, during the entire year, snow falls for 66.2 days and aggregates up to 833mm (32.8") of snow.Sea temperature
In December, the average sea temperature in Tenno, Japan, is 13.4°C (56.1°F).Note: You can swim in 13.4°C (56.1°F) below 10°C (50°F) with proper thermal wear; failing that, the cold shock and respiratory challenges are nearly certain. A short span at 13°C (55.4°F) without it is tough.
Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 06:42 and sunset at 16:15. On the last day of December, sunrise is at 07:01 and sunset at 16:24 JST.
Sunshine
In December, the average sunshine in Tenno, Japan, is 2.1h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In December, the maximum UV index of 1 suggests these recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Tenno, Japan
- Average high temperature in December: 5°C
The warmest month (with the highest average high temperature) is August (26.7°C).
The month with the lowest average high temperature is January (1.8°C).
- Average low temperature in December: 1.7°C
The month with the highest average low temperature is August (21.7°C).
The coldest month (with the lowest average low temperature) is February (-1.8°C).
Average pressure in December
Tenno, Japan
- Average pressure in December: 1015.7mbar
The month with the highest atmospheric pressure is November (1018.2mbar).
The month with the lowest atmospheric pressure is July (1008.8mbar).
Average wind speed in December
Tenno, Japan
- Average wind speed in December: 23.5km/h
The windiest month (with the highest average wind speed) is December (23.5km/h).
The calmest month (with the lowest average wind speed) is July (11.2km/h).
Average humidity in December
Tenno, Japan
- Average humidity in December: 78%
The month with the highest relative humidity is July (85%).
The months with the lowest relative humidity are April and October (74%).
Average rainfall in December
Tenno, Japan
- Average rainfall in December: 138mm
The wettest month (with the highest rainfall) is December (138mm).
The driest month (with the least rainfall) is May (56mm).
Average rainfall days in December
Tenno, Japan
- Average rainfall days in December: 15.9 days
The month with the highest number of rainy days is November (21.6 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in December
Tenno, Japan
- Average snowfall in December: 199mm
The month with the highest snowfall is January (259mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Tenno, Japan
- Average snowfall days in December: 13.5 days
The month with the highest number of snowfall days is January (20.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Tenno, Japan
- Average sea temperature in December: 13.4°C
The best month for swimming (with the highest average sea temperature) is August (25.8°C).
The coldest month (with the lowest average sea temperature) is March (9.3°C).
Average daylight in December /
Average sunshine in December
Tenno, Japan
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 2h and 6min
The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 1h and 24min).
Average sunshine days in December
Tenno, Japan
- Average sunshine days in December: 2.4 days
The month with the most sunshine days is May (14.4 days).
The month with the least sunshine days is January (1.4 days).
Average UV index in December
Tenno, Japan
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Tenno, Japan
- Average cloud cover in December: 78
The month with the most cloud cover is January (Cloud cover 86).
The months with the least cloud cover are August and September (Cloud cover 39).
Average visibility in December
Tenno, Japan
- Average visibility in December: 8km
The months with the highest visibility are September and October (10km).
The month with the lowest visibility is January (7km).
