January Weather in Omu, Japan

Last updated: August 23, 2025

In January, the average temperature in Omu, Japan hovers around -7°C (20°F), with lows dipping to a brisk -17°C (1°F) and highs reaching a chilly 3°C (38°F). Expect 63 mm (2.5 in) of precipitation spread over 14 days, contributing to an average humidity of 87%. Dress warmly and be prepared for wet conditions!

January Temperature in Omu

In January in Omu, the average temperature is -7°C (20°F). The maximum can reach 3°C (38°F), while the minimum can dip as low as -17°C (1°F). It's advisable to pack warm clothing and be prepared for chilly conditions if you're planning to visit during this time.

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

The chart illustrates January temperature patterns in Omu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Omu, January typically has an average temperature of -7°C (20°F), with highs reaching up to 3°C (38°F) and lows dropping to around -17°C (1°F).

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

January Precipitation in Omu

In Omu in January, the precipitation amount is 63 mm (2.5 in) over a span of 14 days.

January Precipitation Trends in Omu

The chart displays monthly precipitation patterns in Omu, 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 Omu, January typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 14 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 Omu

In Omu in January humidity is 87%. With an average temperature of -7°C (20°F), this humidity feels like a biting chill that penetrates through layers of clothing, making outdoor exploration daunting and uncomfortable for travelers.

January Average Humidity in Omu

This chart illustrates the average monthly humidity levels in Omu, 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 Omu is approximately 87%, 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 Omu

In Omu in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Omu, you can visit Hourly UV Index in Omu.

Maximum UV Index Levels in Omu for January

The chart shows the monthly maximum UV Index (UVI) for Omu 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 Omu typically reaches 2, which falls under the low exposure category.

Data source: Omu 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 Omu Compares to Other Months

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

This table compares monthly weather conditions in Omu, 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 (20°F)	63 mm (2.5 inches)	87%	low
February Weather	-6°C (21°F)	63 mm (2.5 inches)	86%	moderate
March Weather	-1°C (30°F)	73 mm (2.9 inches)	85%	high
April Weather	4°C (40°F)	60 mm (2.3 inches)	85%	high
May Weather	10°C (51°F)	87 mm (3.4 inches)	88%	very high
June Weather	13°C (56°F)	88 mm (3.5 inches)	88%	very high
July Weather	18°C (65°F)	82 mm (3.2 inches)	93%	very high
August Weather	19°C (66°F)	157 mm (6.2 inches)	95%	very high
September Weather	17°C (62°F)	80 mm (3.1 inches)	88%	high
October Weather	11°C (51°F)	134 mm (5.3 inches)	80%	moderate
November Weather	4°C (39°F)	102 mm (4.0 inches)	78%	moderate
December Weather	-3°C (27°F)	69 mm (2.7 inches)	82%	low