January Weather in Yaotsu, Japan

Last updated: August 23, 2025

In January, the average temperature in Yaotsu, Japan hovers around 3°C (37°F), with lows dipping to -9°C (16°F) and highs reaching up to 15°C (58°F). Expect 72 mm (2.9 in) of precipitation spread over approximately 11 days, accompanied by a high average humidity of 82%. Stay prepared for a chilly and damp month!

January Temperature in Yaotsu

In January in Yaotsu, the average temperature is 3°C (37°F). The maximum can reach up to 15°C (58°F) and the minimum can dip as low as -9°C (16°F). For travelers, this means it's wise to prepare for a chilly climate with a mix of mild days and cold nights.

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

The chart illustrates January temperature patterns in Yaotsu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yaotsu, January typically has an average temperature of 3°C (37°F), with highs reaching up to 15°C (58°F) and lows dropping to around -9°C (16°F).

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

January Precipitation in Yaotsu

In Yaotsu in January, the total precipitation amount is 72 mm (2.9 in) distributed over a span of 11 days.

January Precipitation Trends in Yaotsu

The chart displays monthly precipitation patterns in Yaotsu, 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 Yaotsu, January typically receives around 72 mm (2.9 inches) of precipitation spread over approximately 11 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 Yaotsu

In Yaotsu in January, humidity is 82%. With an average temperature of 3°C (37°F), this humidity feels like an uncomfortable chill that wraps around you, making outdoor activities less enjoyable and prompting a constant search for warmth.

January Average Humidity in Yaotsu

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

In Yaotsu 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 Yaotsu for better planning.

Maximum UV Index Levels in Yaotsu for January

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

Data source: Yaotsu 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 Yaotsu Compares to Other Months

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

This table compares monthly weather conditions in Yaotsu, 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 (37°F)	72 mm (2.9 inches)	82%	moderate
February Weather	3°C (38°F)	92 mm (3.6 inches)	79%	high
March Weather	8°C (46°F)	165 mm (6.5 inches)	74%	very high
April Weather	12°C (54°F)	207 mm (8.1 inches)	76%	very high
May Weather	17°C (63°F)	218 mm (8.6 inches)	83%	extreme
June Weather	21°C (70°F)	220 mm (8.7 inches)	87%	extreme
July Weather	25°C (77°F)	483 mm (19.0 inches)	93%	extreme
August Weather	26°C (80°F)	270 mm (10.6 inches)	91%	extreme
September Weather	22°C (72°F)	241 mm (9.5 inches)	87%	very high
October Weather	17°C (62°F)	219 mm (8.6 inches)	85%	high
November Weather	10°C (51°F)	77 mm (3.0 inches)	83%	moderate
December Weather	5°C (41°F)	83 mm (3.3 inches)	83%	moderate