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 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
The transition into December indicates a reduction in the average high-temperature, down to a fresh 10.5°C (50.9°F) from November's refreshing 16°C (60.8°F). Iwai witnesses a consistent average low-temperature of 4.3°C (39.7°F) throughout December.Humidity
In Iwai, the average relative humidity in December is 63%.Rainfall
The month with the least rainfall in Iwai is December, when the rain falls for 7.8 days and typically collects 31mm (1.22") of precipitation.Snowfall
In Iwai, snow does not fall in April through December.Daylight
With an average of 9h and 48min of daylight, December has the shortest days of the year.On the first day of December in Iwai, sunrise is at 06:32 and sunset at 16:26. On the last day of the month, sunrise is at 06:50 and sunset at 16:36 JST.
Sunshine
In December, the average sunshine in Iwai is 6.1h.UV index
The months with the lowest UV index in Iwai are January and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In December, the maximum UV index of 2 suggests this advice:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Boost your sun resistance with garments that are densely woven yet spacious.
Frequently asked questions
What are December temperatures in Iwai?
What is the average humidity in December in Iwai?
What is the driest month in Iwai?
How many days does it rain in December in Iwai?
When it does not snow in Iwai?
Does it snow in Iwai in December?
What is the month with the shortest days in Iwai?
What is the average length of the day in December in Iwai?
When is the sunrise / sunset in December in Iwai?
How long on average sun shines in December in Iwai?
What is the month with the lowest UV index in Iwai?
How high is the UV index in December in Iwai?
Average temperature in December
Iwai, Japan
- Average high temperature in December: 10.5°C
The warmest month (with the highest average high temperature) is August (31.9°C).
The month with the lowest average high temperature is January (8.3°C).
- Average low temperature in December: 4.3°C
The month with the highest average low temperature is August (24.4°C).
The coldest month (with the lowest average low temperature) is January (1.7°C).
Average pressure in December
Iwai, Japan
- Average pressure in December: 1016.3mbar
The month with the highest atmospheric pressure is November (1018.2mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in December
Iwai, Japan
- Average wind speed in December: 10.5km/h
The windiest month (with the highest average wind speed) is April (12.3km/h).
The calmest month (with the lowest average wind speed) is November (9.1km/h).
Average humidity in December
Iwai, Japan
- Average humidity in December: 63%
The months with the highest relative humidity are June and July (76%).
The month with the lowest relative humidity is January (60%).
Average rainfall in December
Iwai, Japan
- Average rainfall in December: 31mm
The wettest month (with the highest rainfall) is October (122mm).
The driest month (with the least rainfall) is December (31mm).
Average rainfall days in December
Iwai, Japan
- Average rainfall days in December: 7.8 days
The month with the highest number of rainy days is July (18.7 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in December
Iwai, Japan
- Average snowfall in December: 0mm
The month with the highest snowfall is February (36mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in December
Iwai, Japan
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is February (2 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Iwai, Japan
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 6h and 1min
The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days in December
Iwai, Japan
- Average sunshine days in December: 21.9 days
The month with the most sunshine days is January (23.3 days).
The month with the least sunshine days is June (9.7 days).
Average UV index in December
Iwai, Japan
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in December
Iwai, Japan
- Average cloud cover in December: 31
The month with the most cloud cover is June (Cloud cover 49).
The month with the least cloud cover is January (Cloud cover 29).
Average visibility in December
Iwai, Japan
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, November and December (10km).
The months with the lowest visibility are April, May, June, July, August, September and October (9km).
Iwai, Japan
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