January Weather in Hirakawa, Japan

Last updated: August 23, 2025

In January, the average temperature in Hirakawa, Japan hovers around -3°C (28°F), but temperatures can vary dramatically, dipping to a chilly -17°C (2°F) at their lowest and reaching a maximum of 5°C (42°F) at times. Prepare for some wet weather, as precipitation averages 84 mm (3.3 in) over about 18 days, contributing to an average humidity of 79%.

January Temperature in Hirakawa

In January in Hirakawa, the average temperature is -3°C (28°F). Maximum temperatures can reach 5°C (42°F), while minimums can drop as low as -17°C (2°F). Travelers should be prepared for cold conditions and pack warmly to enjoy their visit.

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

The chart illustrates January temperature patterns in Hirakawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hirakawa, January typically has an average temperature of -3°C (28°F), with highs reaching up to 5°C (42°F) and lows dropping to around -17°C (2°F).

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

January Precipitation in Hirakawa

In Hirakawa in January, the precipitation amount is 84 mm (3.3 in) over a span of 18 days.

January Precipitation Trends in Hirakawa

The chart displays monthly precipitation patterns in Hirakawa, 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 Hirakawa, January typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 18 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 Hirakawa

In Hirakawa in January, humidity is 79%. With an average temperature of -3°C (28°F), this humidity feels like a biting chill that clings to your skin, making outdoor exploration brisk and invigorating, yet potentially uncomfortably damp if you're not dressed warmly enough.

January Average Humidity in Hirakawa

This chart illustrates the average monthly humidity levels in Hirakawa, 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 Hirakawa is approximately 79%, 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 Hirakawa

In Hirakawa 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 Hirakawa, you can check the information here.

Maximum UV Index Levels in Hirakawa for January

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

Data source: Hirakawa 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 Hirakawa Compares to Other Months

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

This table compares monthly weather conditions in Hirakawa, 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 (28°F)	84 mm (3.3 inches)	79%	moderate
February Weather	-2°C (29°F)	116 mm (4.6 inches)	78%	moderate
March Weather	2°C (36°F)	112 mm (4.4 inches)	77%	high
April Weather	7°C (45°F)	129 mm (5.1 inches)	78%	very high
May Weather	14°C (57°F)	111 mm (4.4 inches)	86%	very high
June Weather	18°C (64°F)	141 mm (5.5 inches)	91%	very high
July Weather	22°C (72°F)	152 mm (6.0 inches)	95%	very high
August Weather	23°C (74°F)	183 mm (7.2 inches)	97%	extreme
September Weather	19°C (66°F)	140 mm (5.5 inches)	89%	very high
October Weather	12°C (54°F)	175 mm (6.9 inches)	81%	high
November Weather	6°C (43°F)	115 mm (4.5 inches)	78%	moderate
December Weather	-1°C (31°F)	133 mm (5.2 inches)	77%	low