January Weather in Iijima, Japan

Last updated: August 23, 2025

In Iijima, Japan, the average temperature in January hovers around -2°C (29°F). Expect chilly conditions, with minimum temperatures dipping to -18°C (-1°F), while some days may reach a maximum of 11°C (52°F). Prepare for about 71 mm (2.8 in) of precipitation spread over approximately 10 days, and keep in mind the average humidity level is a brisk 76%.

January Temperature in Iijima

In January in Iijima, the average temperature is -2°C (29°F), with maximums reaching 11°C (52°F) and minimums dropping as low as -18°C (-1°F). Be prepared for cold temperatures and pack accordingly if you're planning to visit!

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

The chart illustrates January temperature patterns in Iijima, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iijima, January typically has an average temperature of -2°C (29°F), with highs reaching up to 11°C (52°F) and lows dropping to around -18°C (-1°F).

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

January Precipitation in Iijima

In Iijima in January, the precipitation amount is 71 mm (2.8 in) over a duration of 10 days.

January Precipitation Trends in Iijima

The chart displays monthly precipitation patterns in Iijima, 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 Iijima, January typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 10 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 Iijima

In Iijima in January, humidity is 76%. With an average temperature of -2°C (29°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities less enjoyable and requiring extra layers to stay warm while exploring.

January Average Humidity in Iijima

This chart illustrates the average monthly humidity levels in Iijima, 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 Iijima is approximately 76%, 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 Iijima

In Iijima 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 Iijima for better planning.

Maximum UV Index Levels in Iijima for January

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

Data source: Iijima 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 Iijima Compares to Other Months

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

This table compares monthly weather conditions in Iijima, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	71 mm (2.8 inches)	76%	moderate
February Weather	-1°C (31°F)	82 mm (3.2 inches)	74%	high
March Weather	4°C (40°F)	146 mm (5.7 inches)	70%	very high
April Weather	9°C (48°F)	148 mm (5.8 inches)	74%	very high
May Weather	14°C (58°F)	161 mm (6.3 inches)	81%	extreme
June Weather	18°C (64°F)	151 mm (5.9 inches)	88%	extreme
July Weather	22°C (71°F)	315 mm (12.4 inches)	93%	extreme
August Weather	23°C (74°F)	150 mm (5.9 inches)	90%	extreme
September Weather	19°C (66°F)	166 mm (6.6 inches)	86%	very high
October Weather	13°C (56°F)	247 mm (9.7 inches)	83%	high
November Weather	7°C (45°F)	65 mm (2.6 inches)	80%	high
December Weather	1°C (34°F)	77 mm (3.0 inches)	78%	moderate