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 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 transition into December is accompanied by a slight temperature decrease, with the average high-temperature shifting from a moderately hot 23.6°C (74.5°F) in November to an agreeable 20.2°C (68.4°F). In Umusa, December's low temperatures hover around a refreshing 18.3°C (64.9°F), reflecting a minor decrease from the daytime highs.Humidity
In December, the average relative humidity in Umusa is 73%.Rainfall
In Umusa, during December, the rain falls for 20.4 days and regularly aggregates up to 78mm (3.07") of precipitation. In Umusa, during the entire year, the rain falls for 229.8 days and collects up to 1512mm (59.53") of precipitation.Daylight
December has the shortest days of the year, with an average of 10h and 30min of daylight.On the first day of the month, sunrise is at 06:59 and sunset at 17:35. On the last day of December, sunrise is at 07:16 and sunset at 17:46 JST.
Sunshine
The average sunshine in December is 4.2h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: An average UV index of 4 in December transforms into this advice:
Undertake precautions - Guarding against sun damage is counselled. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature in Umusa?
What is the average humidity in December in Umusa?
How many days does it rain in December in Umusa?
What is the month with the shortest days in Umusa?
What is the average length of the day in December in Umusa?
What time are sunrise and sunset in December in Umusa?
How many hours of sunshine does Umusa have in December?
What is the month with the lowest UV index in Umusa?
How high is the UV index in December in Umusa?
Average temperature in December
Umusa, Japan
- Average high temperature in December: 20.2°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 (18.6°C).
- Average low temperature in December: 18.3°C
The month with the highest average low temperature is August (27.8°C).
The coldest month (with the lowest average low temperature) is January (16.3°C).
Average pressure in December
Umusa, Japan
- Average pressure in December: 1020mbar
The month with the highest atmospheric pressure is January (1021mbar).
The month with the lowest atmospheric pressure is August (1006.7mbar).
Average wind speed in December
Umusa, Japan
- Average wind speed in December: 25.7km/h
The windiest month (with the highest average wind speed) is December (25.7km/h).
The calmest month (with the lowest average wind speed) is May (18.4km/h).
Average humidity in December
Umusa, Japan
- Average humidity in December: 73%
The month with the highest relative humidity is June (87%).
The month with the lowest relative humidity is January (72%).
Average rainfall in December
Umusa, Japan
- Average rainfall in December: 78mm
The wettest month (with the highest rainfall) is June (228mm).
The driest month (with the least rainfall) is January (63mm).
Average rainfall days in December
Umusa, Japan
- Average rainfall days in December: 20.4 days
The month with the highest number of rainy days is June (22.6 days).
The month with the least rainy days is November (16.2 days).
Average daylight in December /
Average sunshine in December
Umusa, Japan
- Average daylight in December: 10h and 3min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Umusa, Japan
- Average sunshine days in December: 7.1 days
The month with the most sunshine days is May (11.1 days).
The month with the least sunshine days is June (5.4 days).
Average UV index in December
Umusa, Japan
- Average UV index in December: 4
The months with the highest UV index are June, July, August and September (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in December
Umusa, Japan
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in December
Umusa, Japan
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is May (9km).
Umusa, Japan
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