January Weather in Itayanagi, Japan

Last updated: August 23, 2025

In January, the average temperature in Itayanagi, Japan hovers around -1°C (30°F). Expect chilly conditions, with minimum temperatures plunging to -14°C (7°F) and maximums peaking at 6°C (43°F). Precipitation is a common feature, with about 79 mm (3.1 in) spread over 18 days, contributing to a noteworthy average humidity of 79%.

January Temperature in Itayanagi

In January in Itayanagi, the average temperature is -1°C (30°F). Maximum temperatures can reach 6°C (43°F), while the minimum can dip as low as -14°C (7°F). Be sure to pack warm clothing if you're planning to visit during this chilly time of year.

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

The chart illustrates January temperature patterns in Itayanagi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Itayanagi, January typically has an average temperature of -1°C (30°F), with highs reaching up to 6°C (43°F) and lows dropping to around -14°C (7°F).

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

January Precipitation in Itayanagi

In Itayanagi in January, the precipitation amount is 79 mm (3.1 in) spread over 18 days.

January Precipitation Trends in Itayanagi

The chart displays monthly precipitation patterns in Itayanagi, 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 Itayanagi, January typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 18 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 Itayanagi

In Itayanagi in January, humidity is 79%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill in the air, making outdoor activities uncomfortable and requiring extra layers to stay warm while exploring.

January Average Humidity in Itayanagi

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

In Itayanagi 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 Itayanagi, you can check the information here.

Maximum UV Index Levels in Itayanagi for January

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

Data source: Itayanagi 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 Itayanagi Compares to Other Months

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

This table compares monthly weather conditions in Itayanagi, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	79 mm (3.1 inches)	79%	moderate
February Weather	-1°C (31°F)	106 mm (4.2 inches)	78%	moderate
March Weather	3°C (38°F)	103 mm (4.1 inches)	77%	high
April Weather	8°C (47°F)	113 mm (4.4 inches)	78%	very high
May Weather	14°C (58°F)	104 mm (4.1 inches)	86%	very high
June Weather	18°C (65°F)	130 mm (5.1 inches)	91%	very high
July Weather	23°C (73°F)	135 mm (5.3 inches)	95%	very high
August Weather	24°C (75°F)	181 mm (7.1 inches)	97%	extreme
September Weather	20°C (68°F)	129 mm (5.1 inches)	89%	very high
October Weather	13°C (56°F)	166 mm (6.6 inches)	81%	high
November Weather	7°C (45°F)	106 mm (4.2 inches)	78%	moderate
December Weather	1°C (33°F)	130 mm (5.1 inches)	77%	low