December weather forecast
Izumo, Japan

December, the first month of the winter in Izumo, is also a fresh month, with an average temperature fluctuating between 3°C (37.4°F) and 10°C (50°F).

Temperature

In Izumo, entering December brings a temperature decrement, reducing from November's enjoyable 16°C (60.8°F) to a fresh 10°C (50°F). In the month of December, Izumo's average low-temperature falls to an icy 3°C (37.4°F).

Rainfall

In Izumo, Japan, during December, the rain falls for 24 days and regularly aggregates up to 121mm (4.76") of precipitation. Throughout the year, there are 224 rainfall days, and 1774mm (69.84") of precipitation is accumulated.

Sea temperature

In Izumo, in December, the average water temperature is 17°C (62.6°F).
Note: Swimming in water with a temperature of 17°C (62.6°F) is not a pleasurable experience for the majority. As the temperature falls below 21°C (69.8°F), it becomes increasingly hard to control one's breathing.

Daylight

December has the shortest days of the year, with an average of 9h and 48min of daylight.
On the first day of the month, sunrise is at 06:59 and sunset at 16:56. On the last day of December, sunrise is at 07:17 and sunset at 17:06 JST.

Sunshine

The months with the least sunshine are January, February and December, with an average of 3h of sunshine.

UV index

December is the month with the lowest UV index in Izumo, 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:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Stay sun-safe with clothing that is both closely woven and worn loosely.