January Weather in Unnan, Japan

Last updated: August 23, 2025

In January, the average temperature in Unnan, Japan hovers around 4°C (39°F). Expect temperatures to dip as low as -7°C (19°F) and reach a comfortable high of 14°C (58°F). With an average humidity of 82%, the month also brings about 96 mm (3.8 in) of precipitation, typically spread across 15 days.

January Temperature in Unnan

In January in Unnan, the average temperature is 4°C (39°F). The maximum can reach 14°C (58°F) and the minimum can be as low as -7°C (19°F). It’s advisable to pack warm clothing for your trip during this chilly period.

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

The chart illustrates January temperature patterns in Unnan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Unnan, January typically has an average temperature of 4°C (39°F), with highs reaching up to 14°C (58°F) and lows dropping to around -7°C (19°F).

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

January Precipitation in Unnan

In Unnan in January, the precipitation amount is 96 mm (3.8 in) over the course of 15 days.

January Precipitation Trends in Unnan

The chart displays monthly precipitation patterns in Unnan, 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 Unnan, January typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 15 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 Unnan

In Unnan in January, humidity is 82%. With an average temperature of 4°C (39°F), this humidity feels like a chill that seeps into your bones, making it uncomfortable for traveling as you find yourself bundled up, yet still damp and cold.

January Average Humidity in Unnan

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

In Unnan 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 Unnan for better planning.

Maximum UV Index Levels in Unnan for January

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

Data source: Unnan 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 Unnan Compares to Other Months

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

This table compares monthly weather conditions in Unnan, 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)	96 mm (3.8 inches)	82%	moderate
February Weather	4°C (40°F)	102 mm (4.0 inches)	79%	moderate
March Weather	8°C (47°F)	138 mm (5.4 inches)	73%	very high
April Weather	13°C (55°F)	125 mm (4.9 inches)	74%	extreme
May Weather	18°C (65°F)	102 mm (4.0 inches)	84%	extreme
June Weather	21°C (70°F)	197 mm (7.7 inches)	86%	extreme
July Weather	25°C (78°F)	301 mm (11.9 inches)	92%	extreme
August Weather	27°C (81°F)	263 mm (10.4 inches)	92%	extreme
September Weather	22°C (72°F)	238 mm (9.4 inches)	87%	very high
October Weather	17°C (62°F)	172 mm (6.8 inches)	85%	high
November Weather	11°C (52°F)	58 mm (2.3 inches)	84%	moderate
December Weather	6°C (43°F)	121 mm (4.8 inches)	82%	moderate