Contents
- Weather in December
- Frequently asked questions
- Average temperature 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 UV index in December
Weather in December
Temperature
The beginning of December involves a decrease in the average high-temperature, transitioning from a comfortable 17.4°C (63.3°F) in November to a cool 12.3°C (54.1°F). Hiroshima experiences an average low-temperature of 3.7°C (38.7°F) in month of December.Humidity
The average relative humidity in December in Hiroshima is 69%.Rainfall
The month with the least rainfall is December, when the rain falls for 17 days and typically collects 41mm (1.61") of precipitation.Snowfall
January through March and December are months with snowfall. December is the first month it typically snows in Hiroshima. Throughout December, in the average 4.5 snowfall days, it receives 30mm (1.18") of snow. In Hiroshima, during the entire year, snow falls for 23.1 days and aggregates up to 130mm (5.12") of snow.Sea temperature
In Hiroshima, the average seawater temperature in December is 16.8°C (62.2°F).Note: A majority do not enjoy swimming in water at 16.8°C (62.2°F). The difficulty in controlling breathing increases progressively as the temperature dips below 21°C (69.8°F).
Daylight
December has the shortest days of the year in Hiroshima, with an average of 9h and 54min of daylight.On the first day of the month, sunrise is at 06:58 and sunset at 17:00. On the last day of December, sunrise is at 07:16 and sunset at 17:10 JST.
Sunshine
In December, the average sunshine is 4.8h.UV index
January and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In December, a daily UV index of 3 turns into the following recommendations:
Guard yourself - An obligation to protect skin and eyes from harm exists. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Frequently asked questions
What is the temperature in December in Hiroshima?
What is the average humidity in December in Hiroshima?
What is the driest month in Hiroshima?
How many days does it rain in December in Hiroshima?
When does it start snowing in Hiroshima?
What is the sea water temperature in December in Hiroshima?
What is the month with the shortest days in Hiroshima?
How many hours of daylight does Hiroshima have in December?
What time are sunrise and sunset in December in Hiroshima?
How many hours of sunshine does Hiroshima have in December?
What is the month with the lowest UV index in Hiroshima?
How high is the UV index in December in Hiroshima?
Average temperature in December
Hiroshima, Japan
- Average high temperature in December: 12.3°C
The warmest month (with the highest average high temperature) is August (32.5°C).
The month with the lowest average high temperature is January (9.7°C).
- Average low temperature in December: 3.7°C
The month with the highest average low temperature is August (24.8°C).
The coldest month (with the lowest average low temperature) is January (1.7°C).
Average humidity in December
Hiroshima, Japan
- Average humidity in December: 69%
The month with the highest relative humidity is July (74%).
The month with the lowest relative humidity is April (63%).
Average rainfall in December
Hiroshima, Japan
- Average rainfall in December: 41.2mm
The wettest month (with the highest rainfall) is July (258.6mm).
The driest month (with the least rainfall) is December (41.2mm).
Average rainfall days in December
Hiroshima, Japan
- Average rainfall days in December: 17 days
The month with the highest number of rainy days is January (19 days).
The month with the least rainy days is October (12 days).
Average snowfall in December
Hiroshima, Japan
- Average snowfall in December: 30mm
The month with the highest snowfall is January (50mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Hiroshima, Japan
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in December
Hiroshima, Japan
- Average sea temperature in December: 16.8°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 February (12.4°C).
Average daylight in December /
Average sunshine in December
Hiroshima, Japan
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is August (Average sunshine: 6h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average UV index in December
Hiroshima, Japan
- Average UV index in December: 3
The month with the highest UV index is July (UV index 11).
The months with the lowest UV index are January and December (UV index 3).
Hiroshima, Japan
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