January Weather in Tomioka, Japan

Last updated: August 23, 2025

In January, the average temperature in Tomioka, Japan hovers around 4°C (39°F). Expect chilly nights with minimums dipping to -7°C (19°F), while daytime highs can reach up to 17°C (62°F). With an average precipitation of 57 mm (2.3 in) spread across 9 days, and humidity levels at a notable 88%, it's wise to prepare for a slightly damp and cool month ahead!

January Temperature in Tomioka

In January in Tomioka, the average temperature is 4°C (39°F). The maximum can reach 17°C (62°F), while the minimum can be as low as -7°C (19°F). Be prepared for a mix of chilly days and mild afternoons during your travels.

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 4°C (39°F), with highs reaching up to 17°C (62°F) and lows dropping to around -7°C (19°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 57 mm (2.3 in) over the course of 9 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 57 mm (2.3 inches) of precipitation spread over approximately 9 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 88%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and necessitating extra layers to stay warm.

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 88%, 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 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 Tomioka for better planning.

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 4, 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	4°C (39°F)	57 mm (2.3 inches)	88%	moderate
February Weather	5°C (41°F)	55 mm (2.2 inches)	86%	high
March Weather	9°C (48°F)	134 mm (5.3 inches)	81%	very high
April Weather	13°C (55°F)	148 mm (5.8 inches)	78%	very high
May Weather	18°C (65°F)	174 mm (6.8 inches)	81%	extreme
June Weather	21°C (69°F)	212 mm (8.3 inches)	88%	extreme
July Weather	24°C (76°F)	338 mm (13.3 inches)	92%	extreme
August Weather	26°C (79°F)	214 mm (8.4 inches)	92%	extreme
September Weather	22°C (71°F)	256 mm (10.1 inches)	89%	very high
October Weather	16°C (62°F)	319 mm (12.6 inches)	87%	high
November Weather	11°C (52°F)	50 mm (2.0 inches)	85%	moderate
December Weather	6°C (43°F)	54 mm (2.1 inches)	86%	moderate