January Weather in Namerikawa, Japan

Last updated: August 23, 2025

In Namerikawa, Japan, the average temperature in January hovers around 2°C (37°F). Expect chilly extremes, with a minimum of -5°C (23°F) and a maximum reaching 15°C (59°F). This month, you can anticipate 197 mm (7.8 in) of precipitation over approximately 21 days, contributing to an average humidity level of 80%. Stay prepared for a damp and cool experience!

January Temperature in Namerikawa

In January in Namerikawa, the average temperature is 2°C (37°F), with maximums reaching 15°C (59°F) and minimums dropping as low as -5°C (23°F). Be sure to pack warm clothing to stay comfortable while exploring the chilly surroundings.

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

The chart illustrates January temperature patterns in Namerikawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Namerikawa, January typically has an average temperature of 2°C (37°F), with highs reaching up to 15°C (59°F) and lows dropping to around -5°C (23°F).

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

January Precipitation in Namerikawa

In Namerikawa in January, the precipitation amount is 197 mm (7.8 in), occurring over the course of 21 days.

January Precipitation Trends in Namerikawa

The chart displays monthly precipitation patterns in Namerikawa, 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 Namerikawa, January typically receives around 197 mm (7.8 inches) of precipitation spread over approximately 21 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 Namerikawa

In Namerikawa in January, humidity is 80%. With an average temperature of 2°C (37°F), this humidity feels like a brisk chill that pierces through your layers, making every step outside feel invigorating yet uncomfortable, especially for travelers unaccustomed to such dampness in the cold.

January Average Humidity in Namerikawa

This chart illustrates the average monthly humidity levels in Namerikawa, 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 Namerikawa is approximately 80%, 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 Namerikawa

In Namerikawa 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 Namerikawa for better planning.

Maximum UV Index Levels in Namerikawa for January

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

Data source: Namerikawa 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 Namerikawa Compares to Other Months

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

This table compares monthly weather conditions in Namerikawa, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (37°F)	197 mm (7.8 inches)	80%	moderate
February Weather	3°C (37°F)	179 mm (7.0 inches)	78%	moderate
March Weather	7°C (45°F)	167 mm (6.6 inches)	76%	very high
April Weather	12°C (53°F)	179 mm (7.0 inches)	77%	very high
May Weather	17°C (64°F)	158 mm (6.2 inches)	85%	very high
June Weather	21°C (69°F)	190 mm (7.5 inches)	89%	extreme
July Weather	25°C (78°F)	357 mm (14.0 inches)	93%	extreme
August Weather	27°C (80°F)	264 mm (10.4 inches)	92%	extreme
September Weather	22°C (73°F)	223 mm (8.8 inches)	84%	very high
October Weather	17°C (62°F)	216 mm (8.5 inches)	81%	high
November Weather	11°C (52°F)	135 mm (5.3 inches)	77%	moderate
December Weather	5°C (42°F)	231 mm (9.1 inches)	79%	moderate