January Weather in Soma, Japan

Last updated: August 23, 2025

In Soma, Japan, the average temperature in January hovers around 5°C (40°F). Expect minimums dipping to -3°C (27°F) and maximums reaching 13°C (56°F). You're likely to encounter 52 mm (2.1 in) of precipitation spread over 8 days, leading to an average humidity of 76%. Stay prepared for a typical winter's day!

January Temperature in Soma

In January in Soma, the average temperature is 5°C (40°F). Maximums can reach 13°C (56°F), and minimums can be as low as -3°C (27°F). Be prepared for chilly weather and pack layered clothing to stay comfortable while exploring.

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

The chart illustrates January temperature patterns in Soma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Soma, January typically has an average temperature of 5°C (40°F), with highs reaching up to 13°C (56°F) and lows dropping to around -3°C (27°F).

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

January Precipitation in Soma

In Soma in January, the total precipitation amount is 52 mm (2.1 in) over the course of 8 days.

January Precipitation Trends in Soma

The chart displays monthly precipitation patterns in Soma, 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 Soma, January typically receives around 52 mm (2.1 inches) of precipitation spread over approximately 8 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 Soma

In Soma in January, humidity is 76%. With an average temperature of 5°C (40°F), this humidity feels like an unwelcome chill that clings to your skin, making it difficult to fully enjoy your travels.

January Average Humidity in Soma

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

In Soma in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Soma, you can check the information here.

Maximum UV Index Levels in Soma for January

The chart shows the monthly maximum UV Index (UVI) for Soma 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 Soma typically reaches 3, which falls under the moderate exposure category.

Data source: Soma 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 Soma Compares to Other Months

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

This table compares monthly weather conditions in Soma, 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 (40°F)	52 mm (2.1 inches)	76%	moderate
February Weather	5°C (41°F)	41 mm (1.6 inches)	75%	moderate
March Weather	7°C (46°F)	117 mm (4.6 inches)	72%	high
April Weather	11°C (51°F)	115 mm (4.5 inches)	73%	very high
May Weather	16°C (60°F)	119 mm (4.7 inches)	80%	very high
June Weather	19°C (66°F)	105 mm (4.1 inches)	87%	very high
July Weather	23°C (73°F)	239 mm (9.4 inches)	92%	extreme
August Weather	25°C (77°F)	158 mm (6.2 inches)	90%	extreme
September Weather	22°C (72°F)	191 mm (7.5 inches)	84%	very high
October Weather	18°C (64°F)	257 mm (10.1 inches)	80%	high
November Weather	13°C (55°F)	44 mm (1.7 inches)	77%	moderate
December Weather	7°C (45°F)	60 mm (2.4 inches)	77%	moderate