January Weather in Yorii, Japan

Last updated: August 23, 2025

In January, the average temperature in Yorii, Japan hovers around 3°C (38°F), with a chilly minimum of -9°C (17°F) and a pleasant maximum of 17°C (63°F). Expect about 47 mm (1.8 in) of precipitation spread over 5 days, contributing to an average humidity of 76%. Prepare accordingly for a blend of cool temperatures and occasional rain!

January Temperature in Yorii

In January in Yorii, the average temperature is 3°C (38°F). The maximum can reach 17°C (63°F), while the minimum can dip as low as -9°C (17°F). This weather makes it essential for travelers to pack warm layers and be prepared for chilly conditions.

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

The chart illustrates January temperature patterns in Yorii, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yorii, January typically has an average temperature of 3°C (38°F), with highs reaching up to 17°C (63°F) and lows dropping to around -9°C (17°F).

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

January Precipitation in Yorii

In Yorii in January, the total precipitation amount is 47 mm (1.8 in) over the course of 5 days.

January Precipitation Trends in Yorii

The chart displays monthly precipitation patterns in Yorii, 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 Yorii, January typically receives around 47 mm (1.8 inches) of precipitation spread over approximately 5 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 Yorii

In Yorii in January, humidity is 76%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and demanding thicker layers for warmth.

January Average Humidity in Yorii

This chart illustrates the average monthly humidity levels in Yorii, 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 Yorii is approximately 76%, 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 Yorii

In Yorii in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Yorii, you can check the information here.

Maximum UV Index Levels in Yorii for January

The chart shows the monthly maximum UV Index (UVI) for Yorii 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 Yorii typically reaches 3, which falls under the moderate exposure category.

Data source: Yorii 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 Yorii Compares to Other Months

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

This table compares monthly weather conditions in Yorii, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (38°F)	47 mm (1.8 inches)	76%	moderate
February Weather	4°C (40°F)	50 mm (2.0 inches)	74%	moderate
March Weather	8°C (48°F)	136 mm (5.4 inches)	70%	very high
April Weather	13°C (55°F)	130 mm (5.1 inches)	74%	very high
May Weather	18°C (65°F)	136 mm (5.4 inches)	81%	extreme
June Weather	21°C (70°F)	187 mm (7.4 inches)	88%	extreme
July Weather	25°C (77°F)	293 mm (11.5 inches)	93%	extreme
August Weather	27°C (80°F)	172 mm (6.8 inches)	90%	extreme
September Weather	22°C (72°F)	226 mm (8.9 inches)	86%	very high
October Weather	17°C (62°F)	305 mm (12.0 inches)	83%	high
November Weather	11°C (52°F)	54 mm (2.1 inches)	80%	moderate
December Weather	6°C (42°F)	46 mm (1.8 inches)	78%	moderate