January Weather in Honmachi, Japan

Last updated: August 23, 2025

In January, the average temperature in Honmachi, Japan hovers around 7°C (46°F), with a minimum dipping to -2°C (29°F) and a maximum reaching up to 19°C (66°F). Expect about 60 mm (2.4 in) of precipitation spread over 6 days, contributing to an average humidity of 75%. So, if you're planning a visit, be ready for some cool, damp days!

January Temperature in Honmachi

In January in Honmachi, the average temperature is 7°C (46°F), with maximums reaching 19°C (66°F) and minimums dropping as low as -2°C (29°F). It's advisable to pack layers and be prepared for varying weather conditions when traveling during this time.

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

The chart illustrates January temperature patterns in Honmachi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Honmachi, January typically has an average temperature of 7°C (46°F), with highs reaching up to 19°C (66°F) and lows dropping to around -2°C (29°F).

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

January Precipitation in Honmachi

In Honmachi in January, the total precipitation amount is 60 mm (2.4 in) spread over 6 days.

January Precipitation Trends in Honmachi

The chart displays monthly precipitation patterns in Honmachi, 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 Honmachi, January typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 6 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 Honmachi

In Honmachi in January humidity is 75%. With an average temperature of 7°C (46°F), this humidity feels like a chilly dampness that clings to your skin, making every step outdoors feel heavier and the cold seep into your bones, which can be quite uncomfortable for traveling.

January Average Humidity in Honmachi

This chart illustrates the average monthly humidity levels in Honmachi, 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 Honmachi is approximately 75%, 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 Honmachi

In Honmachi in January, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Honmachi.

Maximum UV Index Levels in Honmachi for January

The chart shows the monthly maximum UV Index (UVI) for Honmachi 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 Honmachi typically reaches 5, which falls under the moderate exposure category.

Data source: Honmachi 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 Honmachi Compares to Other Months

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

This table compares monthly weather conditions in Honmachi, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (46°F)	60 mm (2.4 inches)	75%	moderate
February Weather	8°C (47°F)	98 mm (3.9 inches)	71%	high
March Weather	13°C (55°F)	140 mm (5.5 inches)	71%	very high
April Weather	17°C (62°F)	135 mm (5.3 inches)	78%	extreme
May Weather	21°C (70°F)	213 mm (8.4 inches)	84%	extreme
June Weather	24°C (75°F)	307 mm (12.1 inches)	86%	extreme
July Weather	27°C (81°F)	427 mm (16.8 inches)	92%	extreme
August Weather	29°C (84°F)	246 mm (9.7 inches)	91%	extreme
September Weather	25°C (78°F)	198 mm (7.8 inches)	84%	extreme
October Weather	21°C (69°F)	124 mm (4.9 inches)	83%	very high
November Weather	15°C (58°F)	85 mm (3.3 inches)	81%	high
December Weather	9°C (48°F)	86 mm (3.4 inches)	79%	moderate