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
Weather in December
Temperature
In December, the meteorological conditions in Ishigaki change slightly, with the average high-temperature moving from a warm 24.9°C (76.8°F) in November to a pleasant 21.9°C (71.4°F). Ishigaki's nocturnal December readings average at 20.1°C (68.2°F), showing little variation from the daytime temperatures.Humidity
January and December, with an average relative humidity of 76%, are the least humid months.Rainfall
In Ishigaki, during December, the rain falls for 21.2 days and regularly aggregates up to 84mm (3.31") of precipitation. In Ishigaki, Japan, during the entire year, the rain falls for 228 days and collects up to 1184mm (46.61") of precipitation.Sea temperature
In December, the average sea temperature is 25°C (77°F).Note: Surface water temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are considered superb and highly pleasant for water activities over extended periods.
Daylight
With an average of 10h and 42min of daylight, December has the shortest days of the year.On the first day of December in Ishigaki, sunrise is at 07:10 and sunset at 17:54. On the last day of the month, sunrise is at 07:26 and sunset at 18:06 JST.
Sunshine
December has the least sunshine of the year in Ishigaki, Japan, with an average of 4.1h of sunshine.UV index
January through March and December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 5 during December translates into the following directions:
Undertake precautions - Obligation exists to protect against skin and eye damage. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Alert! The Sun's UV rays are heightened by the reflection of sand and water.
Frequently asked questions
What are December temperatures in Ishigaki?
What are the least humid months in Ishigaki?
What is the average humidity in December in Ishigaki?
How many days does it rain in December in Ishigaki?
What is the water temperature in December in Ishigaki?
What is the month with the shortest days in Ishigaki?
How many hours of daylight does Ishigaki have in December?
What time are sunrise and sunset in December in Ishigaki?
What is the month with the least sunshine in Ishigaki?
How many hours of sunshine does Ishigaki have in December?
What are the months with the lowest UV index in Ishigaki?
How high is the UV index in December in Ishigaki?
Average temperature in December
Ishigaki, Japan
- Average high temperature in December: 21.9°C
The warmest months (with the highest average high temperature) are July and August (29.3°C).
The month with the lowest average high temperature is January (20.6°C).
- Average low temperature in December: 20.1°C
The month with the highest average low temperature is July (28.4°C).
The coldest month (with the lowest average low temperature) is January (18.7°C).
Average pressure in December
Ishigaki, Japan
- Average pressure in December: 1019.3mbar
The month with the highest atmospheric pressure is January (1020.3mbar).
The month with the lowest atmospheric pressure is August (1005.6mbar).
Average wind speed in December
Ishigaki, Japan
- Average wind speed in December: 32.9km/h
The windiest month (with the highest average wind speed) is December (32.9km/h).
The calmest month (with the lowest average wind speed) is May (20.4km/h).
Average humidity in December
Ishigaki, Japan
- Average humidity in December: 76%
The month with the highest relative humidity is June (85%).
The months with the lowest relative humidity are January and December (76%).
Average rainfall in December
Ishigaki, Japan
- Average rainfall in December: 84mm
The wettest month (with the highest rainfall) is August (217mm).
The driest month (with the least rainfall) is March (50mm).
Average rainfall days in December
Ishigaki, Japan
- Average rainfall days in December: 21.2 days
The month with the highest number of rainy days is August (22.1 days).
The month with the least rainy days is April (16.7 days).
Average sea temperature in December
Ishigaki, Japan
- Average sea temperature in December: 25°C
The best months for swimming (with the highest average sea temperature) are July, August and September (29°C).
The coldest months (with the lowest average sea temperature) are January and February (23°C).
Average daylight in December /
Average sunshine in December
Ishigaki, Japan
- Average daylight in December: 10h and 4min
The month with the longest days is June (Average daylight: 13h and 36min).
The month with the shortest days is December (Average daylight: 10h and 42min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in December
Ishigaki, Japan
- Average sunshine days in December: 6.3 days
The month with the most sunshine days is June (11.8 days).
The month with the least sunshine days is November (6.2 days).
Average UV index in December
Ishigaki, Japan
- Average UV index in December: 5
The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January, February, March and December (UV index 5).
Average cloud cover in December
Ishigaki, Japan
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in December
Ishigaki, Japan
- Average visibility in December: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
Ishigaki, Japan
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