January Weather in Tomari, Japan

Last updated: August 23, 2025

In Tomari, Japan, the average temperature in January hovers around -4°C (25°F), making it a chilly time of year. Expect minimum temperatures to drop to -14°C (7°F), while the warmest days may reach up to 4°C (40°F). Precipitation is fairly common, with an average of 99 mm (3.9 in) spread across 20 days, contributing to an overall humidity level of 84%. Bundle up and prepare for a crisp, damp atmosphere!

January Temperature in Tomari

In January in Tomari, the average temperature is -4°C (25°F), with maximums reaching 4°C (40°F) and minimums dropping as low as -14°C (7°F). Travelers should be prepared for cold weather and pack accordingly to enjoy their stay comfortably.

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

The chart illustrates January temperature patterns in Tomari, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tomari, January typically has an average temperature of -4°C (25°F), with highs reaching up to 4°C (40°F) and lows dropping to around -14°C (7°F).

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

January Precipitation in Tomari

In Tomari in January, the precipitation amount is 99 mm (3.9 in) spread over 20 days.

January Precipitation Trends in Tomari

The chart displays monthly precipitation patterns in Tomari, 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 Tomari, January typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 20 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 Tomari

In Tomari in January, humidity is 84%. With an average temperature of -4°C (25°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable.

January Average Humidity in Tomari

This chart illustrates the average monthly humidity levels in Tomari, 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 Tomari is approximately 84%, 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 Tomari

In Tomari in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Tomari, you can visit Hourly UV Index in Tomari.

Maximum UV Index Levels in Tomari for January

The chart shows the monthly maximum UV Index (UVI) for Tomari 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 Tomari typically reaches 2, which falls under the low exposure category.

Data source: Tomari 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 Tomari Compares to Other Months

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

This table compares monthly weather conditions in Tomari, 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 (25°F)	99 mm (3.9 inches)	84%	low
February Weather	-3°C (26°F)	103 mm (4.1 inches)	83%	moderate
March Weather	1°C (34°F)	98 mm (3.8 inches)	81%	moderate
April Weather	5°C (41°F)	88 mm (3.4 inches)	81%	high
May Weather	11°C (53°F)	86 mm (3.4 inches)	86%	very high
June Weather	15°C (59°F)	109 mm (4.3 inches)	87%	very high
July Weather	20°C (68°F)	94 mm (3.7 inches)	93%	very high
August Weather	21°C (70°F)	145 mm (5.7 inches)	95%	very high
September Weather	18°C (64°F)	126 mm (5.0 inches)	88%	very high
October Weather	12°C (53°F)	149 mm (5.9 inches)	83%	moderate
November Weather	5°C (41°F)	176 mm (6.9 inches)	79%	moderate
December Weather	-2°C (29°F)	159 mm (6.3 inches)	80%	low