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 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
A subtle decrease in the average high-temperature marks December, falling from November's chilly 6.1°C (43°F) to a freezing cold -0.4°C (31.3°F). Nights in December cool down in Ishikari, indicating a minor disparity from daytime highs with an average low-temperature of -4.7°C (23.5°F).Humidity
In December, the average relative humidity is 84%.Rainfall
In December, the rain falls for 9.7 days. Throughout December, 84mm (3.31") of precipitation is accumulated. In Ishikari, during the entire year, the rain falls for 169.9 days and collects up to 854mm (33.62") of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Ishikari, during December, snow falls for 23.7 days and regularly aggregates up to 345mm (13.58") of snow. In Ishikari, Japan, during the entire year, snow falls for 111.1 days and aggregates up to 1455mm (57.28") of snow.Sea temperature
In December, the average sea temperature is 8.8°C (47.8°F).Note: Dipping into 8.8°C (47.8°F) below 10°C (50°F) needs protective wear, or you'd face cold shock and breathing issues swiftly. Meanwhile, a slight swim around 13°C (55.4°F) feels cold to the bone.
Daylight
The month with the shortest days in Ishikari is December, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 06:46 and sunset at 16:00. On the last day of the month, sunrise is at 07:06 and sunset at 16:09 JST.
Sunshine
In Ishikari, the average sunshine in December is 2.4h.UV index
The months with the lowest UV index in Ishikari are January, February, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 1 during December leads to these advisories:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Frequently asked questions
How cold is December in Ishikari?
What is the average humidity in December in Ishikari?
How much does it rain in Ishikari in December?
How much does it snow in Ishikari in December?
What is the sea water temperature in December in Ishikari?
What is the month with the shortest days in Ishikari?
How many hours of daylight does Ishikari have in December?
When is the sunrise / sunset in December in Ishikari?
How long on average sun shines in December in Ishikari?
When is the lowest UV index in Ishikari?
What is the UV index reading in December in Ishikari?
Average temperature in December
Ishikari, Japan
- Average high temperature in December: -0.4°C
The warmest month (with the highest average high temperature) is August (23.7°C).
The month with the lowest average high temperature is January (-2.8°C).
- Average low temperature in December: -4.7°C
The month with the highest average low temperature is August (17°C).
The coldest month (with the lowest average low temperature) is February (-8.5°C).
Average pressure in December
Ishikari, Japan
- Average pressure in December: 1012.9mbar
The month with the highest atmospheric pressure is November (1016mbar).
The month with the lowest atmospheric pressure is July (1008.5mbar).
Average wind speed in December
Ishikari, Japan
- Average wind speed in December: 16.9km/h
The windiest month (with the highest average wind speed) is December (16.9km/h).
The calmest months (with the lowest average wind speed) are July and August (10.1km/h).
Average humidity in December
Ishikari, Japan
- Average humidity in December: 84%
The months with the highest relative humidity are January and July (87%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in December
Ishikari, Japan
- Average rainfall in December: 84mm
The wettest month (with the highest rainfall) is August (123mm).
The driest month (with the least rainfall) is April (45mm).
Average rainfall days in December
Ishikari, Japan
- Average rainfall days in December: 9.7 days
The month with the highest number of rainy days is July (19.9 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in December
Ishikari, Japan
- Average snowfall in December: 345mm
The month with the highest snowfall is January (377mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Ishikari, Japan
- Average snowfall days in December: 23.7 days
The month with the highest number of snowfall days is January (27.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
Ishikari, Japan
- Average sea temperature in December: 8.8°C
The best month for swimming (with the highest average sea temperature) is August (21.6°C).
The coldest months (with the lowest average sea temperature) are February and March (5.3°C).
Average daylight in December /
Average sunshine in December
Ishikari, Japan
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 2h and 2min
The months with the most sunshine are May and August (Average sunshine: 9h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 0min).
Average sunshine days in December
Ishikari, Japan
- Average sunshine days in December: 2.2 days
The month with the most sunshine days is May (12.1 days).
The month with the least sunshine days is December (2.2 days).
Average UV index in December
Ishikari, Japan
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Ishikari, Japan
- Average cloud cover in December: 76
The month with the most cloud cover is January (Cloud cover 81).
The month with the least cloud cover is September (Cloud cover 37).
Average visibility in December
Ishikari, Japan
- Average visibility in December: 7km
The month with the highest visibility is October (10km).
The months with the lowest visibility are January, February and December (7km).
Ishikari, Japan
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