January Weather in Kaizu, Japan

Last updated: August 23, 2025

The average temperature in Kaizu, Japan during January is a chilly 5°C (41°F), with a range that can dip as low as -5°C (23°F) and rise up to 18°C (64°F). Expect about 52 mm (2.0 in) of precipitation over approximately 7 days, contributing to an average humidity level of 82%. Prepare for a brisk and damp month ahead!

January Temperature in Kaizu

In January in Kaizu, the average temperature is 5°C (41°F). Maximum temperatures can reach 18°C (64°F), while the minimum can drop as low as -5°C (23°F). Be prepared for a mix of cool and mild weather during your travels.

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

The chart illustrates January temperature patterns in Kaizu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kaizu, January typically has an average temperature of 5°C (41°F), with highs reaching up to 18°C (64°F) and lows dropping to around -5°C (23°F).

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

January Precipitation in Kaizu

In Kaizu in January, the precipitation amount is 52 mm (2.0 in) over a duration of 7 days.

January Precipitation Trends in Kaizu

The chart displays monthly precipitation patterns in Kaizu, 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 Kaizu, January typically receives around 52 mm (2.0 inches) of precipitation spread over approximately 7 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 Kaizu

In Kaizu in January, humidity is 82%. With an average temperature of 5°C (41°F), this humidity feels like a chilly, damp blanket wrapping around you, making outdoor activities less enjoyable and making it essential to dress in layers to stay warm while navigating the wet conditions.

January Average Humidity in Kaizu

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

In Kaizu 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 Kaizu for better planning.

Maximum UV Index Levels in Kaizu for January

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

Data source: Kaizu 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 Kaizu Compares to Other Months

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

This table compares monthly weather conditions in Kaizu, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (41°F)	52 mm (2.0 inches)	82%	moderate
February Weather	6°C (42°F)	59 mm (2.3 inches)	79%	high
March Weather	10°C (50°F)	151 mm (6.0 inches)	74%	very high
April Weather	14°C (58°F)	163 mm (6.4 inches)	76%	very high
May Weather	19°C (67°F)	196 mm (7.7 inches)	83%	extreme
June Weather	23°C (74°F)	196 mm (7.7 inches)	87%	extreme
July Weather	27°C (81°F)	384 mm (15.1 inches)	93%	extreme
August Weather	29°C (84°F)	253 mm (10.0 inches)	91%	extreme
September Weather	25°C (76°F)	225 mm (8.9 inches)	87%	very high
October Weather	19°C (66°F)	246 mm (9.7 inches)	85%	high
November Weather	13°C (55°F)	61 mm (2.4 inches)	83%	moderate
December Weather	7°C (45°F)	68 mm (2.7 inches)	83%	moderate