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
The decrease of average high-temperatures is mild in December in Matsuyama, with a decline from a moderate 15.5°C (59.9°F) in November to a frosty 9.9°C (49.8°F). December records a small disparity from daytime temperatures, marking an average low-temperature of 5°C (41°F) in Matsuyama.Humidity
The average relative humidity in December in Matsuyama is 74%.Rainfall
In Matsuyama, in December, it is raining for 10.7 days, with typically 38mm (1.5") of accumulated precipitation. Throughout the year, there are 162.8 rainfall days, and 749mm (29.49") of precipitation is accumulated.Snowfall
Months with snowfall in Matsuyama, Japan, are January, February and December. The month with the most snowfall in Matsuyama is December, when snow falls for 1.2 days and typically aggregates up to 6mm (0.24") of snow.Sea temperature
In December, the average sea temperature is 18.3°C (64.9°F).Note: The majority of people find swimming in 18.3°C (64.9°F) unenjoyable. As the water temperature decreases from 21°C (69.8°F) to 15°C (59°F), breathing becomes more challenging to control.
Daylight
With an average of 10h and 0min of daylight, December has the shortest days of the year in Matsuyama.On the first day of December, sunrise is at 06:55 and sunset at 17:00. On the last day of the month, sunrise is at 07:13 and sunset at 17:10 JST.
Sunshine
In Matsuyama, the average sunshine in December is 5.3h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index in Matsuyama. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum UV index, 2 during December, leads to the following recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What are the temperatures in Matsuyama in December?
What is the average humidity in December in Matsuyama?
How many days does it rain in December in Matsuyama?
What is the snowiest month in Matsuyama?
When does it start snowing in Matsuyama?
What is the sea temperature in December in Matsuyama?
What is the month with the shortest days in Matsuyama?
What is the average length of the day in December in Matsuyama?
When are sunrise and sunset in December in Matsuyama?
How many hours of sunshine does Matsuyama have in December?
When is the lowest UV index in Matsuyama?
How high is the UV index in December in Matsuyama?
Average temperature in December
Matsuyama, Japan
- Average high temperature in December: 9.9°C
The warmest month (with the highest average high temperature) is August (29.2°C).
The month with the lowest average high temperature is January (8°C).
- Average low temperature in December: 5°C
The month with the highest average low temperature is August (23.4°C).
The coldest month (with the lowest average low temperature) is January (2.9°C).
Average pressure in December
Matsuyama, Japan
- Average pressure in December: 1020.6mbar
The month with the highest atmospheric pressure is January (1021mbar).
The month with the lowest atmospheric pressure is June (1008.4mbar).
Average wind speed in December
Matsuyama, Japan
- Average wind speed in December: 11.9km/h
The windiest month (with the highest average wind speed) is January (12.2km/h).
The calmest month (with the lowest average wind speed) is June (6.6km/h).
Average humidity in December
Matsuyama, Japan
- Average humidity in December: 74%
The month with the highest relative humidity is July (84%).
The months with the lowest relative humidity are January, February and March (72%).
Average rainfall in December
Matsuyama, Japan
- Average rainfall in December: 38mm
The wettest month (with the highest rainfall) is June (149mm).
The driest month (with the least rainfall) is January (24mm).
Average rainfall days in December
Matsuyama, Japan
- Average rainfall days in December: 10.7 days
The month with the highest number of rainy days is July (21.3 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in December
Matsuyama, Japan
- Average snowfall in December: 6mm
The month with the highest snowfall is December (6mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Matsuyama, Japan
- Average snowfall days in December: 1.2 days
The month with the highest number of snowfall days is January (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in December
Matsuyama, Japan
- Average sea temperature in December: 18.3°C
The best month for swimming (with the highest average sea temperature) is August (27.2°C).
The coldest month (with the lowest average sea temperature) is February (14.7°C).
Average daylight in December /
Average sunshine in December
Matsuyama, Japan
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in December
Matsuyama, Japan
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is August (6.4 days).
Average UV index in December
Matsuyama, 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
Matsuyama, Japan
- Average cloud cover in December: 42
The month with the most cloud cover is January (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Matsuyama, Japan
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, August, September, October, November and December (10km).
The months with the lowest visibility are April, May, June and July (9km).
Matsuyama, Japan
Weather forecast for your location
2. Allow the app to use your location
