January Weather in Kainan, Japan

Last updated: August 23, 2025

In January, the average temperature in Kainan, Japan hovers around 6°C (44°F), with a minimum dipping to -1°C (30°F) and a maximum reaching 17°C (62°F). Expect about 63 mm (2.5 in) of precipitation across 9 days, contributing to an average humidity level of 82%.

January Temperature in Kainan

In January in Kainan, the average temperature is 6°C (44°F). Maximums can reach 17°C (62°F) and minimums can be as low as -1°C (30°F). Be prepared for a range of temperatures and pack accordingly if you're planning to travel during this month.

January Weather in Kainan: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Kainan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kainan, January typically has an average temperature of 6°C (44°F), with highs reaching up to 17°C (62°F) and lows dropping to around -1°C (30°F).

Data source: Temperature data for Kainan generated using information from the Copernicus Climate Change Service.

January Precipitation in Kainan

In Kainan in January, the total precipitation amount is 63 mm (2.5 in) spread over a duration of 9 days.

January Precipitation Trends in Kainan

The chart displays monthly precipitation patterns in Kainan, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Kainan, January typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Kainan

In Kainan in January humidity is 82%. With an average temperature of 6°C (44°F), this humidity feels like a damp chill that settles into your bones, making travel uncomfortable as every step feels heavy with moisture and the cool air seems to cling to your skin.

January Average Humidity in Kainan

This chart illustrates the average monthly humidity levels in Kainan, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Kainan is approximately 82%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Kainan

In Kainan in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Kainan for better planning.

Maximum UV Index Levels in Kainan for January

The chart shows the monthly maximum UV Index (UVI) for Kainan in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Kainan typically reaches 4, which falls under the moderate exposure category.

Data source: Kainan January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Kainan Compares to Other Months

Weather in Kainan varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Kainan, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Kainan, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (44°F)	63 mm (2.5 inches)	82%	moderate
February Weather	7°C (44°F)	76 mm (3.0 inches)	79%	moderate
March Weather	10°C (51°F)	115 mm (4.5 inches)	74%	very high
April Weather	14°C (58°F)	128 mm (5.1 inches)	76%	extreme
May Weather	19°C (67°F)	164 mm (6.5 inches)	83%	extreme
June Weather	22°C (72°F)	199 mm (7.8 inches)	87%	extreme
July Weather	26°C (80°F)	302 mm (11.9 inches)	93%	extreme
August Weather	28°C (83°F)	178 mm (7.0 inches)	91%	extreme
September Weather	25°C (77°F)	203 mm (8.0 inches)	87%	very high
October Weather	20°C (67°F)	267 mm (10.5 inches)	85%	high
November Weather	14°C (57°F)	63 mm (2.5 inches)	83%	moderate
December Weather	9°C (48°F)	76 mm (3.0 inches)	83%	moderate