January Weather in Ishioka, Japan

Last updated: August 23, 2025

In January, the average temperature in Ishioka, Japan is a brisk 4°C (40°F), with temperatures ranging from a chilly -7°C (20°F) to a mild 17°C (62°F). During this time, expect 44 mm (1.7 in) of precipitation over roughly 5 days, accompanied by a relatively high average humidity of 76%.

January Temperature in Ishioka

In January in Ishioka, the average temperature is 4°C (40°F), with a maximum that can reach 17°C (62°F) and a minimum that can drop as low as -7°C (20°F). Be prepared for varied weather conditions and pack accordingly if you plan to travel during this time.

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

The chart illustrates January temperature patterns in Ishioka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ishioka, January typically has an average temperature of 4°C (40°F), with highs reaching up to 17°C (62°F) and lows dropping to around -7°C (20°F).

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

January Precipitation in Ishioka

In Ishioka in January, the precipitation amount is 44 mm (1.7 in) over the course of 5 days.

January Precipitation Trends in Ishioka

The chart displays monthly precipitation patterns in Ishioka, 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 Ishioka, January typically receives around 44 mm (1.7 inches) of precipitation spread over approximately 5 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 Ishioka

In Ishioka in January humidity is 76%. With an average temperature of 4°C (40°F), this humidity feels like a chilly embrace, making travel feel damp and slightly clammy, as the cool air clings to your skin, requiring extra layers to stay comfortable while experiencing the sights.

January Average Humidity in Ishioka

This chart illustrates the average monthly humidity levels in Ishioka, 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 Ishioka 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 Ishioka

In Ishioka 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 Ishioka, you can check the information here.

Maximum UV Index Levels in Ishioka for January

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

Data source: Ishioka 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 Ishioka Compares to Other Months

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

This table compares monthly weather conditions in Ishioka, 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 (40°F)	44 mm (1.7 inches)	76%	moderate
February Weather	5°C (42°F)	41 mm (1.6 inches)	75%	moderate
March Weather	10°C (49°F)	134 mm (5.3 inches)	72%	high
April Weather	14°C (57°F)	118 mm (4.6 inches)	73%	very high
May Weather	19°C (66°F)	131 mm (5.1 inches)	80%	very high
June Weather	22°C (71°F)	140 mm (5.5 inches)	87%	extreme
July Weather	25°C (78°F)	220 mm (8.7 inches)	92%	extreme
August Weather	27°C (81°F)	117 mm (4.6 inches)	90%	very high
September Weather	23°C (74°F)	172 mm (6.8 inches)	84%	very high
October Weather	18°C (65°F)	239 mm (9.4 inches)	80%	high
November Weather	13°C (55°F)	78 mm (3.1 inches)	77%	moderate
December Weather	7°C (44°F)	58 mm (2.3 inches)	77%	moderate