January weather forecastChatan, Japan

January

Weather in January

January, like December, in Chatan, Japan, is another refreshing winter month, with an average temperature ranging between min 16.8°C (62.2°F) and max 18.8°C (65.8°F).

Temperature

With average high temperatures of 18.8°C (65.8°F) and lows of 16.8°C (62.2°F), January is the coldest month.

Humidity

The least humid month in Chatan, Japan, is January, with an average relative humidity of 72%.

Rainfall

The months with the least rainfall in Chatan are January and February Rain falls for 19 days and accumulates 53mm (2.09") of rain.

Sea temperature

In Chatan, the average seawater temperature in January is 22.3°C (72.1°F).
Note: For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 22.3°C (72.1°F).

Daylight

The average length of the day in January in Chatan is 10h and 42min.
On the first day of January in Chatan, sunrise is at 07:16 and sunset at 17:47. On the last day of the month, sunrise is at 07:14 and sunset at 18:10 JST.

Sunshine

The month with the least sunshine is January, with an average of 4.3h of sunshine.

UV index

In January, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 5 during January translates into the following guidance:
Act with care - The suggestion to avoid sunburn is emphasized. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Be attentive! The UV exposure is heightened with reflections from sand and water.

Updated: Jan 31, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

With average high temperatures of 18.8°C (65.8°F) and lows of 16.8°C (62.2°F), January is the coldest month in Chatan, Japan.

The high-temperature during January is 18.8°C (65.8°F) and the low-temperature is 16.8°C (62.2°F).

January is the least humid month in Chatan, Japan, with an average relative humidity of 72%.

In Chatan, Japan, the average relative humidity in January is 72%.

January and February are months with the least rain in Chatan, Japan, when the rain falls for 19 days and typically aggregates up to 53mm (2.09") of rain.

In Chatan, Japan, during January, the rain falls for 19 days and regularly aggregates up to 53mm (2.09") of precipitation.

In January, the average sea temperature in Chatan, Japan, is 22.3°C (72.1°F). For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 22.3°C (72.1°F).

In January, the average day length in Chatan, Japan, is 10h and 42min.

On the first day of January, sunrise is at 07:16 and sunset at 17:47. On the last day of the month, sunrise is at 07:14 and sunset at 18:10 JST.

The month with the least sunshine in Chatan is January, with an average of 4.3h of sunshine.

In January, the average sunshine duration is 4.3h.

In January, the average daily maximum UV index in Chatan is 5. A UV Index of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

20.5°C

18.8°C

19.4°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

28.7km/h

27.6km/h

26.1km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

18.5

16.7

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

9.1

7.5

8.7

Average UV index

Average cloud cover

Average visibility

Average temperature in January
Chatan, Japan

Average high temperature in January: 18.8°C

The warmest month (with the highest average high temperature) is August (29.5°C).
The month with the lowest average high temperature is January (18.8°C).

Average low temperature in January: 16.8°C

The month with the highest average low temperature is August (28.2°C).
The coldest month (with the lowest average low temperature) is January (16.8°C).

Average pressure in January
Chatan, Japan

Average pressure in January: 1020.9mbar

The month with the highest atmospheric pressure is January (1020.9mbar).
The month with the lowest atmospheric pressure is August (1006.6mbar).

Average wind speed in January
Chatan, Japan

Average wind speed in January: 26.5km/h

The windiest month (with the highest average wind speed) is December (27.6km/h).
The calmest month (with the lowest average wind speed) is May (19.5km/h).

Average humidity in January
Chatan, Japan

Average humidity in January: 72%

The month with the highest relative humidity is June (86%).
The month with the lowest relative humidity is January (72%).

Average rainfall in January
Chatan, Japan

Average rainfall in January: 53mm

The wettest month (with the highest rainfall) is June (198mm).
The driest months (with the least rainfall) are January and February (53mm).

Average rainfall days in January
Chatan, Japan

Average rainfall days in January: 19 days

The month with the highest number of rainy days is October (19.7 days).
The month with the least rainy days is July (16.1 days).

Average sea temperature in January
Chatan, Japan

Average sea temperature in January: 22.3°C

The best month for swimming (with the highest average sea temperature) is August (28.7°C).
The coldest month (with the lowest average sea temperature) is February (20.9°C).

Average daylight in January /
Average sunshine in January
Chatan, Japan

Average daylight in January: 10h and 42min

The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).

Average sunshine in January: 4h and 18min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

Average sunshine days in January
Chatan, Japan

Average sunshine days in January: 7.5 days

The month with the most sunshine days is July (12.6 days).
The month with the least sunshine days is September (7.1 days).

Average UV index in January
Chatan, Japan

Average UV index in January: 5

The months with the highest UV index are June, July, August and September (UV index 7).
The month with the lowest UV index is December (UV index 4).

Average cloud cover in January
Chatan, Japan

Average cloud cover in January: 63

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 34).

Average visibility in January
Chatan, Japan

Average visibility in January: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).