Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The average high-temperature drops in December, from November's mild 13.9°C (57°F) to a chilly 8.4°C (47.1°F). With a barely noticeable fluctuation in temperature, Nanao reaches an average low of 4.8°C (40.6°F) during the December nights.Humidity
The average relative humidity in December in Nanao is 76%.Rainfall
In December, in Nanao, the rain falls for 23.4 days. Throughout December, 166mm (6.54") of precipitation is accumulated. In Nanao, during the entire year, the rain falls for 197.7 days and collects up to 1451mm (57.13") of precipitation.Snowfall
Months with snowfall are January through April and December. December is the first month it typically snows. Throughout December, in the average 8.7 snowfall days, it receives 163mm (6.42") of snow. In Nanao, during the entire year, snow falls for 45.9 days and aggregates up to 930mm (36.61") of snow.Sea temperature
In Nanao, in December, the average water temperature is 14.8°C (58.6°F).Note: Swimming in 14.8°C (58.6°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.
Daylight
December has the shortest days of the year, with an average of 9h and 42min of daylight.On the first day of the month, sunrise is at 06:46 and sunset at 16:35. On the last day of December, sunrise is at 07:05 and sunset at 16:45 JST.
Sunshine
The average sunshine in December in Nanao is 2.9h.UV index
In December, the average daily maximum UV index in Nanao, Japan, is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The average daily UV index of 2 in December transforms into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Frequently asked questions
What are the temperatures in Nanao in December?
What is the average humidity in December in Nanao?
How many days does it rain in December in Nanao?
When does it start to snow in Nanao?
What is the sea water temperature in December in Nanao?
What is the month with the shortest days in Nanao?
What is the average length of the day in December in Nanao?
What time are sunrise and sunset in December in Nanao?
How many hours of sunshine does Nanao have in December?
How high is the UV index in December in Nanao?
Average temperature in December
Nanao, Japan
- Average high temperature in December: 8.4°C
The warmest month (with the highest average high temperature) is August (29°C).
The month with the lowest average high temperature is January (5.2°C).
- Average low temperature in December: 4.8°C
The month with the highest average low temperature is August (23.8°C).
The coldest months (with the lowest average low temperature) are January and February (1.8°C).
Average pressure in December
Nanao, Japan
- Average pressure in December: 1018.1mbar
The month with the highest atmospheric pressure is February (1019.5mbar).
The month with the lowest atmospheric pressure is June (1009mbar).
Average wind speed in December
Nanao, Japan
- Average wind speed in December: 17.3km/h
The windiest month (with the highest average wind speed) is December (17.3km/h).
The calmest month (with the lowest average wind speed) is June (9.6km/h).
Average humidity in December
Nanao, Japan
- Average humidity in December: 76%
The month with the highest relative humidity is July (83%).
The months with the lowest relative humidity are March, April and May (73%).
Average rainfall in December
Nanao, Japan
- Average rainfall in December: 166mm
The wettest month (with the highest rainfall) is July (167mm).
The driest month (with the least rainfall) is May (76mm).
Average rainfall days in December
Nanao, Japan
- Average rainfall days in December: 23.4 days
The month with the highest number of rainy days is December (23.4 days).
The month with the least rainy days is May (12 days).
Average snowfall in December
Nanao, Japan
- Average snowfall in December: 163mm
The month with the highest snowfall is January (390mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Nanao, Japan
- Average snowfall days in December: 8.7 days
The month with the highest number of snowfall days is January (17 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Nanao, Japan
- Average sea temperature in December: 14.8°C
The best month for swimming (with the highest average sea temperature) is August (26.8°C).
The coldest month (with the lowest average sea temperature) is March (10.4°C).
Average daylight in December /
Average sunshine in December
Nanao, Japan
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 2h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in December
Nanao, Japan
- Average sunshine days in December: 3.7 days
The month with the most sunshine days is May (17.7 days).
The month with the least sunshine days is December (3.7 days).
Average UV index in December
Nanao, Japan
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Nanao, Japan
- Average cloud cover in December: 72
The month with the most cloud cover is January (Cloud cover 76).
The months with the least cloud cover are May and August (Cloud cover 36).
Average visibility in December
Nanao, Japan
- Average visibility in December: 9km
The month with the highest visibility is October (10km).
The month with the lowest visibility is January (8km).
Nanao, Japan
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