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 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
December's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from November's enjoyable 17.6°C (63.7°F) to a fresh 12.7°C (54.9°F). An average nighttime temperature of 9.1°C (48.4°F) marks December.Humidity
The average relative humidity in December is 66%.Rainfall
In Shirowa, in December, during 11 rainfall days, 53mm (2.09") of precipitation is typically accumulated. Throughout the year, there are 168.2 rainfall days, and 1268mm (49.92") of precipitation is accumulated.Snowfall
January, February and December are months with snowfall in Shirowa. The months with the most snowfall days in Shirowa are January, February and December, with an average of 0.1 snowfall days.Daylight
The month with the shortest days in Shirowa is December, with an average of 9h and 54min of daylight.On the first day of December, sunrise is at 06:35 and sunset at 16:36. On the last day of the month, sunrise is at 06:53 and sunset at 16:46 JST.
Sunshine
The average sunshine in December is 6.3h.UV index
January and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: During December, 3 as the daily maximum UV index converts into the following advice:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
What is the average December temperature in Shirowa?
What is the average humidity in December in Shirowa?
How many days does it rain in December in Shirowa?
What is the snowiest month in Shirowa?
When does it start snowing in Shirowa?
What is the month with the shortest days in Shirowa?
How many hours of daylight does Shirowa have in December?
When is the sunrise / sunset in December in Shirowa?
How long on average sun shines in December in Shirowa?
When is the lowest UV index in Shirowa?
What is the UV index reading in December in Shirowa?
Average temperature in December
Shirowa, Japan
- Average high temperature in December: 12.7°C
The warmest month (with the highest average high temperature) is August (28.3°C).
The month with the lowest average high temperature is January (10.3°C).
- Average low temperature in December: 9.1°C
The month with the highest average low temperature is August (25.8°C).
The coldest month (with the lowest average low temperature) is January (6.6°C).
Average pressure in December
Shirowa, Japan
- Average pressure in December: 1017.2mbar
The month with the highest atmospheric pressure is November (1018.2mbar).
The month with the lowest atmospheric pressure is June (1009mbar).
Average wind speed in December
Shirowa, Japan
- Average wind speed in December: 28.8km/h
The windiest month (with the highest average wind speed) is January (30.6km/h).
The calmest month (with the lowest average wind speed) is August (16.6km/h).
Average humidity in December
Shirowa, Japan
- Average humidity in December: 66%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is January (63%).
Average rainfall in December
Shirowa, Japan
- Average rainfall in December: 53mm
The wettest month (with the highest rainfall) is July (207mm).
The driest month (with the least rainfall) is January (39mm).
Average rainfall days in December
Shirowa, Japan
- Average rainfall days in December: 11 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is January (7.8 days).
Average snowfall days in December
Shirowa, Japan
- Average snowfall days in December: 0.1 days
The months with the highest number of snowfall days are January, February and December (0.1 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Shirowa, 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: 6h and 2min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).
Average sunshine days in December
Shirowa, Japan
- Average sunshine days in December: 18 days
The month with the most sunshine days is January (21.7 days).
The month with the least sunshine days is June (9.6 days).
Average UV index in December
Shirowa, Japan
- Average UV index in December: 3
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in December
Shirowa, Japan
- Average cloud cover in December: 27
The month with the most cloud cover is June (Cloud cover 43).
The month with the least cloud cover is January (Cloud cover 24).
Average visibility in December
Shirowa, Japan
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).
Shirowa, Japan
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