January Weather in Yamakita, Japan

Last updated: August 23, 2025

In Yamakita, Japan, the average temperature in January is a crisp 4°C (39°F). Expect chilly nights with minimums dropping to -7°C (19°F), while daytime highs can reach a comfortable 17°C (63°F). Be prepared for some rain, as precipitation averages around 69 mm (2.7 in) over 8 days. With an average humidity of 76%, it's a season that calls for cozy layers and an umbrella!

January Temperature in Yamakita

In January in Yamakita, the average temperature is 4°C (39°F), with maximums reaching 17°C (63°F) and minimums falling as low as -7°C (19°F). Travelers should prepare for chilly weather, with the potential for pleasant daytime temperatures that contrast with the possibility of frosty nights.

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

The chart illustrates January temperature patterns in Yamakita, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yamakita, January typically has an average temperature of 4°C (39°F), with highs reaching up to 17°C (63°F) and lows dropping to around -7°C (19°F).

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

January Precipitation in Yamakita

In Yamakita in January, the precipitation amount is 69 mm (2.7 in) that falls over a period of 8 days.

January Precipitation Trends in Yamakita

The chart displays monthly precipitation patterns in Yamakita, 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 Yamakita, January typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 8 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 Yamakita

In Yamakita in January humidity is 76%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making it quite uncomfortable for traveling.

January Average Humidity in Yamakita

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

In Yamakita 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 Yamakita for better planning.

Maximum UV Index Levels in Yamakita for January

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

Data source: Yamakita 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 Yamakita Compares to Other Months

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

This table compares monthly weather conditions in Yamakita, 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 (39°F)	69 mm (2.7 inches)	76%	moderate
February Weather	5°C (41°F)	83 mm (3.3 inches)	74%	high
March Weather	8°C (47°F)	202 mm (7.9 inches)	70%	very high
April Weather	12°C (55°F)	173 mm (6.8 inches)	74%	very high
May Weather	17°C (63°F)	180 mm (7.1 inches)	81%	extreme
June Weather	20°C (69°F)	234 mm (9.2 inches)	88%	extreme
July Weather	24°C (76°F)	321 mm (12.6 inches)	93%	extreme
August Weather	26°C (79°F)	198 mm (7.8 inches)	90%	extreme
September Weather	22°C (72°F)	242 mm (9.5 inches)	86%	very high
October Weather	17°C (62°F)	360 mm (14.2 inches)	83%	high
November Weather	12°C (53°F)	102 mm (4.0 inches)	80%	moderate
December Weather	6°C (44°F)	79 mm (3.1 inches)	78%	moderate