January Weather in Tomioka, Japan

Last updated: August 23, 2025

In January, the average temperature in Tomioka, Japan hovers around 3°C (38°F). Expect chilly days, with nighttime lows dipping to a brisk -6°C (21°F) and daytime highs reaching a comfortable 14°C (58°F). Be prepared for some rain, as 50 mm (2.0 in) of precipitation typically falls over 5 days. With an average humidity level of 76%, it's a good idea to dress in layers and enjoy the cool, moist air!

January Temperature in Tomioka

In January in Tomioka, the average temperature is 3°C (38°F). The maximum can reach 14°C (58°F), while the minimum can be as low as -6°C (21°F). Travelers should prepare for chilly conditions, with the potential for warmer afternoons but cold evenings.

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

The chart illustrates January temperature patterns in Tomioka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tomioka, January typically has an average temperature of 3°C (38°F), with highs reaching up to 14°C (58°F) and lows dropping to around -6°C (21°F).

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

January Precipitation in Tomioka

In Tomioka in January, the precipitation amount is 50 mm (2.0 in) over a period of 5 days.

January Precipitation Trends in Tomioka

The chart displays monthly precipitation patterns in Tomioka, 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 Tomioka, January typically receives around 50 mm (2.0 inches) of precipitation spread over approximately 5 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 Tomioka

In Tomioka in January, humidity is 76%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and demanding thicker layers for warmth.

January Average Humidity in Tomioka

This chart illustrates the average monthly humidity levels in Tomioka, 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 Tomioka is approximately 76%, 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 Tomioka

In Tomioka in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Tomioka, you can check the information here.

Maximum UV Index Levels in Tomioka for January

The chart shows the monthly maximum UV Index (UVI) for Tomioka 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 Tomioka typically reaches 3, which falls under the moderate exposure category.

Data source: Tomioka 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 Tomioka Compares to Other Months

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

This table compares monthly weather conditions in Tomioka, 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 (38°F)	50 mm (2.0 inches)	76%	moderate
February Weather	4°C (40°F)	38 mm (1.5 inches)	75%	moderate
March Weather	8°C (46°F)	144 mm (5.7 inches)	72%	high
April Weather	12°C (53°F)	121 mm (4.8 inches)	73%	very high
May Weather	17°C (63°F)	137 mm (5.4 inches)	80%	very high
June Weather	20°C (68°F)	121 mm (4.8 inches)	87%	very high
July Weather	24°C (75°F)	238 mm (9.4 inches)	92%	extreme
August Weather	26°C (79°F)	151 mm (5.9 inches)	90%	extreme
September Weather	22°C (71°F)	171 mm (6.7 inches)	84%	very high
October Weather	17°C (62°F)	233 mm (9.2 inches)	80%	high
November Weather	11°C (52°F)	60 mm (2.4 inches)	77%	moderate
December Weather	5°C (42°F)	60 mm (2.3 inches)	77%	moderate