January Weather in Innoshima, Japan

Last updated: August 23, 2025

In January, the average temperature in Innoshima, Japan is a cool 7°C (45°F), with the thermometer dipping as low as -1°C (31°F) and occasionally rising to a comfortable 15°C (60°F). Expect about 54 mm (2.1 in) of precipitation spread over 9 days, accompanied by a relatively high average humidity of 82%. Stay prepared for a mix of chilly days and potential rain!

January Temperature in Innoshima

In January in Innoshima, the average temperature is 7°C (45°F). Maximum temperatures can reach 15°C (60°F), while minimums can drop to as low as -1°C (31°F). Be sure to pack layers to stay comfortable during your travels!

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

The chart illustrates January temperature patterns in Innoshima, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Innoshima, January typically has an average temperature of 7°C (45°F), with highs reaching up to 15°C (60°F) and lows dropping to around -1°C (31°F).

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

January Precipitation in Innoshima

In Innoshima in January, the precipitation amount is 54 mm (2.1 in) over a span of 9 days.

January Precipitation Trends in Innoshima

The chart displays monthly precipitation patterns in Innoshima, 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 Innoshima, January typically receives around 54 mm (2.1 inches) of precipitation spread over approximately 9 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 Innoshima

In Innoshima in January humidity is 82%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities feel much colder and less inviting, which can make exploring less enjoyable unless you're dressed warmly.

January Average Humidity in Innoshima

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

In Innoshima 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 Innoshima for better planning.

Maximum UV Index Levels in Innoshima for January

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

Data source: Innoshima 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 Innoshima Compares to Other Months

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

This table compares monthly weather conditions in Innoshima, 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 (45°F)	54 mm (2.1 inches)	82%	moderate
February Weather	7°C (45°F)	67 mm (2.6 inches)	79%	moderate
March Weather	11°C (51°F)	105 mm (4.1 inches)	73%	very high
April Weather	14°C (58°F)	122 mm (4.8 inches)	74%	very high
May Weather	19°C (66°F)	116 mm (4.6 inches)	84%	extreme
June Weather	22°C (73°F)	151 mm (5.9 inches)	86%	extreme
July Weather	26°C (80°F)	285 mm (11.2 inches)	92%	extreme
August Weather	29°C (84°F)	133 mm (5.2 inches)	92%	extreme
September Weather	25°C (78°F)	177 mm (7.0 inches)	87%	very high
October Weather	20°C (69°F)	201 mm (7.9 inches)	85%	high
November Weather	15°C (59°F)	50 mm (2.0 inches)	84%	high
December Weather	10°C (50°F)	64 mm (2.5 inches)	82%	moderate