January Weather in Nankoku, Japan

Last updated: August 23, 2025

In January, the average temperature in Nankoku, Japan hovers around 8°C (46°F), with unseasonably cold lows of -1°C (30°F) and warming highs reaching 18°C (65°F). Expect 54 mm (2.1 in) of precipitation spread across 4 days, contributing to an average humidity level of 74%.

January Temperature in Nankoku

In January in Nankoku, the average temperature is 8°C (46°F). Maximums can reach 18°C (65°F), and minimums can drop as low as -1°C (30°F). This makes it a perfect time for travelers to enjoy the crisp air while exploring the local attractions, so be sure to pack accordingly!

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

The chart illustrates January temperature patterns in Nankoku, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nankoku, January typically has an average temperature of 8°C (46°F), with highs reaching up to 18°C (65°F) and lows dropping to around -1°C (30°F).

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

January Precipitation in Nankoku

In Nankoku in January, the total precipitation amount is 54 mm (2.1 in) over the course of 4 days.

January Precipitation Trends in Nankoku

The chart displays monthly precipitation patterns in Nankoku, 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 Nankoku, January typically receives around 54 mm (2.1 inches) of precipitation spread over approximately 4 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 Nankoku

In Nankoku in January, humidity is 74%. With an average temperature of 8°C (46°F), this humidity feels like a chilly embrace, making travel slightly uncomfortable as the damp air penetrates your clothing, leaving you feeling cool and clammy while exploring the area.

January Average Humidity in Nankoku

This chart illustrates the average monthly humidity levels in Nankoku, 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 Nankoku is approximately 74%, 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 Nankoku

In Nankoku 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 Nankoku for better planning.

Maximum UV Index Levels in Nankoku for January

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

Data source: Nankoku 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 Nankoku Compares to Other Months

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

This table compares monthly weather conditions in Nankoku, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (46°F)	54 mm (2.1 inches)	74%	moderate
February Weather	8°C (47°F)	86 mm (3.4 inches)	70%	high
March Weather	12°C (54°F)	147 mm (5.8 inches)	70%	very high
April Weather	15°C (60°F)	170 mm (6.7 inches)	76%	extreme
May Weather	19°C (67°F)	206 mm (8.1 inches)	82%	extreme
June Weather	22°C (73°F)	286 mm (11.3 inches)	86%	extreme
July Weather	26°C (79°F)	523 mm (20.6 inches)	91%	extreme
August Weather	27°C (82°F)	298 mm (11.7 inches)	88%	extreme
September Weather	25°C (77°F)	262 mm (10.3 inches)	85%	very high
October Weather	20°C (69°F)	251 mm (9.9 inches)	82%	high
November Weather	15°C (59°F)	63 mm (2.5 inches)	79%	high
December Weather	10°C (50°F)	67 mm (2.7 inches)	77%	moderate