January Weather in Komatsu, Japan

Last updated: August 23, 2025

In January, the average temperature in Komatsu, Japan hovers around 5°C (40°F). Expect chilly days, with minimum temperatures plunging to -3°C (28°F) and highs reaching a mild 15°C (60°F). Precipitation is quite notable, totaling 195 mm (7.7 in) over approximately 22 days, while the air feels particularly damp with an average humidity of 80%.

January Temperature in Komatsu

In January in Komatsu, the average temperature is 5°C (40°F), with maximums reaching 15°C (60°F) and minimums dropping as low as -3°C (28°F). Travelers should prepare for a range of temperatures, ensuring they pack accordingly for both chilly and milder conditions.

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

The chart illustrates January temperature patterns in Komatsu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Komatsu, January typically has an average temperature of 5°C (40°F), with highs reaching up to 15°C (60°F) and lows dropping to around -3°C (28°F).

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

January Precipitation in Komatsu

In Komatsu in January, the total precipitation amount is 195 mm (7.7 in), falling over the course of 22 days.

January Precipitation Trends in Komatsu

The chart displays monthly precipitation patterns in Komatsu, 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 Komatsu, January typically receives around 195 mm (7.7 inches) of precipitation spread over approximately 22 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 Komatsu

In Komatsu in January, humidity is 80%. With an average temperature of 5°C (40°F), this humidity feels like a damp chill settling on your skin, making travel uncomfortable and requiring extra layers to stay warm while navigating the cool, misty atmosphere.

January Average Humidity in Komatsu

This chart illustrates the average monthly humidity levels in Komatsu, 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 Komatsu is approximately 80%, 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 Komatsu

In Komatsu 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 Komatsu for better planning.

Maximum UV Index Levels in Komatsu for January

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

Data source: Komatsu 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 Komatsu Compares to Other Months

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

This table compares monthly weather conditions in Komatsu, 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)	195 mm (7.7 inches)	80%	moderate
February Weather	5°C (41°F)	162 mm (6.4 inches)	78%	moderate
March Weather	8°C (47°F)	145 mm (5.7 inches)	76%	very high
April Weather	12°C (54°F)	161 mm (6.3 inches)	77%	very high
May Weather	18°C (64°F)	124 mm (4.9 inches)	85%	very high
June Weather	21°C (70°F)	147 mm (5.8 inches)	89%	extreme
July Weather	26°C (78°F)	286 mm (11.3 inches)	93%	extreme
August Weather	27°C (82°F)	237 mm (9.3 inches)	92%	extreme
September Weather	23°C (74°F)	213 mm (8.4 inches)	84%	very high
October Weather	18°C (65°F)	191 mm (7.5 inches)	81%	high
November Weather	13°C (55°F)	147 mm (5.8 inches)	77%	moderate
December Weather	7°C (46°F)	240 mm (9.5 inches)	79%	moderate