January Weather in Joyo, Japan

Last updated: August 23, 2025

In Joyo, Japan, the average temperature in January hovers around 5°C (42°F). Expect chilly nights with a minimum of -5°C (23°F), while daytime highs can reach up to 18°C (64°F). During this month, you can anticipate approximately 48 mm (1.9 in) of precipitation over 6 days, contributing to an average humidity level of 82%. Perfect for cozy indoor activities!

January Temperature in Joyo

In January in Joyo, the average temperature is 5°C (42°F). The maximum can reach 18°C (64°F), and the minimum can be as low as -5°C (23°F). Be sure to pack layers to stay comfortable in the varying temperatures during your travels.

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

The chart illustrates January temperature patterns in Joyo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Joyo, January typically has an average temperature of 5°C (42°F), with highs reaching up to 18°C (64°F) and lows dropping to around -5°C (23°F).

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

January Precipitation in Joyo

In Joyo in January, the precipitation amount is 48 mm (1.9 in) distributed over 6 days.

January Precipitation Trends in Joyo

The chart displays monthly precipitation patterns in Joyo, 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 Joyo, January typically receives around 48 mm (1.9 inches) of precipitation spread over approximately 6 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 Joyo

In Joyo in January humidity is 82%. With an average temperature of 5°C (42°F), this humidity feels like a wet chill that seeps into your bones, making outdoor exploration uncomfortable and dampening the joy of traveling.

January Average Humidity in Joyo

This chart illustrates the average monthly humidity levels in Joyo, 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 Joyo is approximately 82%, 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 Joyo

In Joyo in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Joyo for better planning.

Maximum UV Index Levels in Joyo for January

The chart shows the monthly maximum UV Index (UVI) for Joyo 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 Joyo typically reaches 4, which falls under the moderate exposure category.

Data source: Joyo 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 Joyo Compares to Other Months

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

This table compares monthly weather conditions in Joyo, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	48 mm (1.9 inches)	82%	moderate
February Weather	6°C (43°F)	60 mm (2.4 inches)	79%	high
March Weather	10°C (51°F)	110 mm (4.3 inches)	74%	very high
April Weather	15°C (59°F)	129 mm (5.1 inches)	76%	extreme
May Weather	20°C (68°F)	144 mm (5.7 inches)	83%	extreme
June Weather	24°C (75°F)	140 mm (5.5 inches)	87%	extreme
July Weather	28°C (82°F)	245 mm (9.7 inches)	93%	extreme
August Weather	29°C (85°F)	150 mm (5.9 inches)	91%	extreme
September Weather	25°C (78°F)	142 mm (5.6 inches)	87%	very high
October Weather	19°C (67°F)	226 mm (8.9 inches)	85%	high
November Weather	13°C (56°F)	40 mm (1.6 inches)	83%	moderate
December Weather	8°C (46°F)	55 mm (2.2 inches)	83%	moderate