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 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
December
Weather in December
Temperature
The start of December comes with a small reduction in the average high-temperature, subtly receding from a warm 23.9°C (75°F) in November to a pleasant 20.6°C (69.1°F). A mild drop to an average of 18.8°C (65.8°F) marks the nights during December.Humidity
In December, the average relative humidity is 73%.Rainfall
In Itoman, in December, it is raining for 21.2 days, with typically 81mm (3.19") of accumulated precipitation. In Itoman, during the entire year, the rain falls for 226.7 days and collects up to 1392mm (54.8") of precipitation.Sea temperature
In December, the average sea temperature in Itoman is 23.7°C (74.7°F).Note: A swim in 23.7°C (74.7°F) waters can be refreshing, especially when factoring in a person's cold tolerance, sunshine, wind, and the overall temperature. As a point of reference, Olympic swimming events are held in 25°C (77°F) to 28°C (82.4°F) waters.
Daylight
December has the shortest days of the year, with an average of 10h and 30min of daylight.On the first day of December, sunrise is at 06:59 and sunset at 17:37. On the last day of the month, sunrise is at 07:16 and sunset at 17:48 JST.
Sunshine
In Itoman, the average sunshine in December is 4.4h.UV index
December is the month with the lowest UV index in Itoman, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 4 during December translates into the following guidance:
Act with care - Obligation to protect against skin and eye damage is highlighted. To guard against the harmful effects of the Sun, minimize exposure during midday. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Heads up! Sand and water reflection magnifies the UV exposure from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Itoman in December?
What is the average humidity in December in Itoman?
How much does it rain in Itoman in December?
What is the sea temperature in December in Itoman?
What is the month with the shortest days in Itoman?
What is the average length of the day in December in Itoman?
When are sunrise and sunset in December in Itoman?
How long on average sun shines in December in Itoman?
What is the month with the lowest UV index in Itoman?
How high is the UV index in December in Itoman?
Average temperature in December
Itoman, Japan
- Average high temperature in December: 20.6°C
The warmest month (with the highest average high temperature) is August (29.4°C).
The month with the lowest average high temperature is January (18.9°C).
- Average low temperature in December: 18.8°C
The month with the highest average low temperature is August (28.3°C).
The coldest month (with the lowest average low temperature) is January (17°C).
Average pressure in December
Itoman, Japan
- Average pressure in December: 1019.8mbar
The month with the highest atmospheric pressure is January (1020.8mbar).
The month with the lowest atmospheric pressure is August (1006.6mbar).
Average wind speed in December
Itoman, Japan
- Average wind speed in December: 28.4km/h
The windiest month (with the highest average wind speed) is December (28.4km/h).
The calmest month (with the lowest average wind speed) is May (20.1km/h).
Average humidity in December
Itoman, Japan
- Average humidity in December: 73%
The month with the highest relative humidity is June (86%).
The month with the lowest relative humidity is January (72%).
Average rainfall in December
Itoman, Japan
- Average rainfall in December: 81mm
The wettest month (with the highest rainfall) is June (201mm).
The driest month (with the least rainfall) is February (59mm).
Average rainfall days in December
Itoman, Japan
- Average rainfall days in December: 21.2 days
The month with the highest number of rainy days is June (21.5 days).
The month with the least rainy days is July (16.4 days).
Average sea temperature in December
Itoman, Japan
- Average sea temperature in December: 23.7°C
The best month for swimming (with the highest average sea temperature) is August (28.7°C).
The coldest month (with the lowest average sea temperature) is February (20.9°C).
Average daylight in December /
Average sunshine in December
Itoman, Japan
- Average daylight in December: 10h and 3min
The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in December
Itoman, Japan
- Average sunshine days in December: 5.7 days
The month with the most sunshine days is July (11.9 days).
The month with the least sunshine days is December (5.7 days).
Average UV index in December
Itoman, Japan
- Average UV index in December: 4
The months with the highest UV index are June, July, August and September (UV index 7).
The month with the lowest UV index is December (UV index 4).
Average cloud cover in December
Itoman, Japan
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Itoman, Japan
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
