January weather forecast
Okayama, Japan

The oh-so-cool January days in Okayama, Japan mark the beginnings of a new year with temperatures chilling down to 1.1°C (34°F), making it the coldest month of the year. Snowfall, though relatively light with 10mm (0.39"), adds an element of white beauty to the landscape. With daylight lasting a little over 10 hours, residents have ample time to enjoy winter festivities. Notably, one may want to own a quality umbrella as rainfall events span approximately 18 days of the month. The nip in the air is palpable but the beautiful city in its winter glory is sure to make up for it.

Temperature

January is Okayama's coldest month, registering average high temperatures of 9°C (48.2°F) and lows of 1.1°C (34°F).

Humidity

In January, the average relative humidity is 65%.

Rainfall

In January, the rain falls for 18 days. Throughout January, 34mm (1.34") of precipitation is accumulated. Throughout the year, there are 189 rainfall days, and 1106mm (43.54") of precipitation is accumulated.

Snowfall

Months with snowfall in Okayama are January through March. The months with the most snowfall in Okayama are January through March, with an average 10mm (0.39") of accumulated snow.

Sea temperature

In Okayama, in January, the average water temperature is 14.6°C (58.3°F).
Note: If planning to swim in 14.6°C (58.3°F) under 10°C (50°F), wear a protective suit. Neglecting this advice might cause immediate cold shock and troubled breathing. A splash around 13°C (55.4°F) is not much warmer.

Daylight

In January, the average length of the day in Okayama, Japan, is 10h and 8min.
On the first day of January in Okayama, sunrise is at 07:11 and sunset at 17:03. On the last day of the month, sunrise is at 07:03 and sunset at 17:31 JST.

Sunshine

With an average of 4.9h of sunshine, January has the least sunshine of the year.

UV index

In January, the average daily maximum UV index in Okayama, Japan, is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: In January, the maximum UV index of 3 suggests these recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.