January Weather in Kato, Japan

Last updated: August 23, 2025

In January, the average temperature in Kato, Japan hovers around 4°C (40°F). Temperatures can dip as low as -7°C (19°F) and soar to a pleasant 15°C (60°F). During this month, expect 44 mm (1.7 in) of precipitation over about 7 days, contributing to an average humidity of 82%.

January Temperature in Kato

In January in Kato, the average temperature is 4°C (40°F). The maximum can reach 15°C (60°F), while the minimum can drop as low as -7°C (19°F). It's advisable to pack layers and prepare for varying weather conditions when traveling during this time.

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

The chart illustrates January temperature patterns in Kato, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kato, January typically has an average temperature of 4°C (40°F), with highs reaching up to 15°C (60°F) and lows dropping to around -7°C (19°F).

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

January Precipitation in Kato

In Kato in January, the precipitation amount is 44 mm (1.7 in) spread over a duration of 7 days.

January Precipitation Trends in Kato

The chart displays monthly precipitation patterns in Kato, 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 Kato, January typically receives around 44 mm (1.7 inches) of precipitation spread over approximately 7 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Kato

In Kato in January, humidity is 82%. With an average temperature of 4°C (40°F), this humidity feels like a chilly dampness that lingers in the air, making travel slightly uncomfortable as the cold penetrates through layers of clothing, often leaving you feeling chilled and clammy.

January Average Humidity in Kato

This chart illustrates the average monthly humidity levels in Kato, 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 Kato 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 Kato

In Kato 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 Kato for better planning.

Maximum UV Index Levels in Kato for January

The chart shows the monthly maximum UV Index (UVI) for Kato 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 Kato typically reaches 4, which falls under the moderate exposure category.

Data source: Kato 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 Kato Compares to Other Months

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

This table compares monthly weather conditions in Kato, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (40°F)	44 mm (1.7 inches)	82%	moderate
February Weather	5°C (41°F)	54 mm (2.1 inches)	79%	high
March Weather	9°C (49°F)	105 mm (4.1 inches)	73%	very high
April Weather	14°C (57°F)	124 mm (4.9 inches)	74%	very high
May Weather	19°C (67°F)	123 mm (4.8 inches)	84%	extreme
June Weather	22°C (73°F)	140 mm (5.5 inches)	86%	extreme
July Weather	26°C (80°F)	302 mm (11.9 inches)	92%	extreme
August Weather	28°C (83°F)	198 mm (7.8 inches)	92%	extreme
September Weather	24°C (75°F)	213 mm (8.4 inches)	87%	very high
October Weather	18°C (65°F)	217 mm (8.5 inches)	85%	high
November Weather	12°C (54°F)	38 mm (1.5 inches)	84%	moderate
December Weather	7°C (44°F)	56 mm (2.2 inches)	82%	moderate