January Weather in Ryotsu-minato, Japan

Last updated: August 23, 2025

In January, the average temperature in Ryotsu-minato, Japan hovers around 4°C (40°F). Expect a chilly atmosphere, with minimum temperatures dipping to -3°C (26°F) and highs reaching up to 13°C (55°F). This month brings considerable precipitation, averaging 134 mm (5.3 in) over approximately 20 days, contributing to an average humidity level of 88%.

January Temperature in Ryotsu-minato

In January in Ryotsu-minato, the average temperature is 4°C (40°F). The maximum can reach 13°C (55°F), and the minimum can be as low as -3°C (26°F). Travelers should be prepared for a mix of chilly and mild weather during this time.

January Weather in Ryotsu-minato: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Ryotsu-minato, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ryotsu-minato, January typically has an average temperature of 4°C (40°F), with highs reaching up to 13°C (55°F) and lows dropping to around -3°C (26°F).

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

January Precipitation in Ryotsu-minato

In Ryotsu-minato, in January, the precipitation amount is 134 mm (5.3 in) distributed over 20 days.

January Precipitation Trends in Ryotsu-minato

The chart displays monthly precipitation patterns in Ryotsu-minato, 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 Ryotsu-minato, January typically receives around 134 mm (5.3 inches) of precipitation spread over approximately 20 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 Ryotsu-minato

In Ryotsu-minato in January, humidity is 88%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration less enjoyable and prompting you to seek cozy indoor activities instead.

January Average Humidity in Ryotsu-minato

This chart illustrates the average monthly humidity levels in Ryotsu-minato, 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 Ryotsu-minato 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 Ryotsu-minato

In Ryotsu-minato 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 Ryotsu-minato, you can check the information here.

Maximum UV Index Levels in Ryotsu-minato for January

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

Data source: Ryotsu-minato 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 Ryotsu-minato Compares to Other Months

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

This table compares monthly weather conditions in Ryotsu-minato, 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)	134 mm (5.3 inches)	88%	moderate
February Weather	4°C (40°F)	106 mm (4.2 inches)	86%	moderate
March Weather	7°C (46°F)	103 mm (4.0 inches)	81%	high
April Weather	11°C (52°F)	112 mm (4.4 inches)	78%	very high
May Weather	16°C (62°F)	94 mm (3.7 inches)	81%	very high
June Weather	20°C (69°F)	93 mm (3.6 inches)	88%	very high
July Weather	25°C (77°F)	258 mm (10.2 inches)	92%	extreme
August Weather	27°C (81°F)	215 mm (8.4 inches)	92%	extreme
September Weather	23°C (74°F)	160 mm (6.3 inches)	89%	very high
October Weather	18°C (65°F)	157 mm (6.2 inches)	87%	high
November Weather	12°C (54°F)	124 mm (4.9 inches)	85%	moderate
December Weather	7°C (44°F)	187 mm (7.3 inches)	86%	moderate