January Weather in Shiso, Japan

Last updated: August 23, 2025

In Shiso, Japan, the average temperature in January hovers around 4°C (40°F). Expect a cool climate with temperatures dipping as low as -8°C (18°F) and peaking at 15°C (59°F). During this period, you can anticipate approximately 42 mm (1.7 in) of precipitation over 6 days, complemented by an average humidity of 82%.

January Temperature in Shiso

In January in Shiso, the average temperature is 4°C (40°F), with maximums reaching up to 15°C (59°F) and minimums dropping as low as -8°C (18°F). It's advisable to pack warm clothing and be prepared for chilly conditions if you're planning to travel during this time.

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

The chart illustrates January temperature patterns in Shiso, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shiso, January typically has an average temperature of 4°C (40°F), with highs reaching up to 15°C (59°F) and lows dropping to around -8°C (18°F).

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

January Precipitation in Shiso

In Shiso in January, the total precipitation amount is 42 mm (1.7 in) spread over 6 days.

January Precipitation Trends in Shiso

The chart displays monthly precipitation patterns in Shiso, 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 Shiso, January typically receives around 42 mm (1.7 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 Shiso

In Shiso in January, humidity is 82%. With an average temperature of 4°C (40°F), this humidity feels like a chilly dampness that lingers in the air, making travel slightly uncomfortable as the cold penetrates through layers of clothing, often leaving you feeling chilled and clammy.

January Average Humidity in Shiso

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

In Shiso 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 Shiso for better planning.

Maximum UV Index Levels in Shiso for January

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

Data source: Shiso 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 Shiso Compares to Other Months

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

This table compares monthly weather conditions in Shiso, 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)	42 mm (1.7 inches)	82%	moderate
February Weather	5°C (41°F)	56 mm (2.2 inches)	79%	high
March Weather	9°C (48°F)	116 mm (4.6 inches)	73%	very high
April Weather	13°C (56°F)	135 mm (5.3 inches)	74%	extreme
May Weather	18°C (65°F)	127 mm (5.0 inches)	84%	extreme
June Weather	22°C (71°F)	170 mm (6.7 inches)	86%	extreme
July Weather	26°C (79°F)	326 mm (12.8 inches)	92%	extreme
August Weather	27°C (82°F)	241 mm (9.5 inches)	92%	extreme
September Weather	23°C (74°F)	237 mm (9.3 inches)	87%	very high
October Weather	18°C (64°F)	205 mm (8.1 inches)	85%	high
November Weather	12°C (53°F)	38 mm (1.5 inches)	84%	moderate
December Weather	6°C (44°F)	58 mm (2.3 inches)	82%	moderate