January Weather in Niimi, Japan

Last updated: August 23, 2025

In January, the average temperature in Niimi, Japan hovers around 2°C (37°F). Expect chilly days, with minimum temperatures dipping to -8°C (18°F) and a maximum reaching 12°C (54°F). This month also sees 52 mm (2.1 in) of precipitation spread over 10 days, contributing to a rather humid atmosphere with an average humidity of 82%.

January Temperature in Niimi

In January in Niimi, the average temperature is 2°C (37°F). Maximums can reach 12°C (54°F), while minimums can drop as low as -8°C (18°F). Travelers should prepare for chilly weather and pack accordingly to enjoy their visit comfortably.

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

The chart illustrates January temperature patterns in Niimi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Niimi, January typically has an average temperature of 2°C (37°F), with highs reaching up to 12°C (54°F) and lows dropping to around -8°C (18°F).

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

January Precipitation in Niimi

In Niimi in January, the total precipitation amount is 52 mm (2.1 in) distributed over a span of 10 days.

January Precipitation Trends in Niimi

The chart displays monthly precipitation patterns in Niimi, 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 Niimi, January typically receives around 52 mm (2.1 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 Niimi

In Niimi in January, humidity is 82%. With an average temperature of 2°C (37°F), this humidity feels like an icy blanket wrapping around you, making outdoor exploration challenging and urging travelers to seek warmer, sheltered spaces.

January Average Humidity in Niimi

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

In Niimi 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 Niimi for better planning.

Maximum UV Index Levels in Niimi for January

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

Data source: Niimi 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 Niimi Compares to Other Months

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

This table compares monthly weather conditions in Niimi, 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 (37°F)	52 mm (2.1 inches)	82%	moderate
February Weather	3°C (38°F)	59 mm (2.3 inches)	79%	high
March Weather	8°C (46°F)	116 mm (4.5 inches)	73%	very high
April Weather	12°C (54°F)	127 mm (5.0 inches)	74%	very high
May Weather	17°C (63°F)	115 mm (4.5 inches)	84%	extreme
June Weather	21°C (69°F)	186 mm (7.3 inches)	86%	extreme
July Weather	25°C (77°F)	356 mm (14.0 inches)	92%	extreme
August Weather	26°C (79°F)	242 mm (9.5 inches)	92%	extreme
September Weather	22°C (71°F)	229 mm (9.0 inches)	87%	very high
October Weather	16°C (61°F)	181 mm (7.1 inches)	85%	high
November Weather	10°C (50°F)	37 mm (1.5 inches)	84%	moderate
December Weather	4°C (40°F)	62 mm (2.4 inches)	82%	moderate