January Weather in Oga, Japan

Last updated: August 23, 2025

In January, the average temperature in Oga, Japan hovers around 3°C (37°F). You can expect a minimum chill of -5°C (23°F), contrasting with a pleasant high of 12°C (54°F). With 148 mm (5.8 in) of precipitation over 22 days, don’t forget your umbrella! The ambient air is fairly humid, with an average humidity of 79%.

January Temperature in Oga

In January in Oga, the average temperature is 3°C (37°F). Maximums can reach 12°C (54°F), while minimums can drop as low as -5°C (23°F). Be sure to pack warm clothing if you plan to travel during this time.

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

The chart illustrates January temperature patterns in Oga, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oga, January typically has an average temperature of 3°C (37°F), with highs reaching up to 12°C (54°F) and lows dropping to around -5°C (23°F).

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

January Precipitation in Oga

In Oga in January, the precipitation amount is 148 mm (5.8 in) over the course of 22 days.

January Precipitation Trends in Oga

The chart displays monthly precipitation patterns in Oga, 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 Oga, January typically receives around 148 mm (5.8 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 Oga

In Oga in January, humidity is 79%. With an average temperature of 3°C (37°F), this humidity feels like a chilly blanket that clings to your skin, making travel uncomfortable and damp as the cold penetrates your layers.

January Average Humidity in Oga

This chart illustrates the average monthly humidity levels in Oga, 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 Oga is approximately 79%, 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 Oga

In Oga 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 Oga, you can check the information here.

Maximum UV Index Levels in Oga for January

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

Data source: Oga 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 Oga Compares to Other Months

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

This table compares monthly weather conditions in Oga, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (37°F)	148 mm (5.8 inches)	79%	moderate
February Weather	3°C (37°F)	159 mm (6.3 inches)	78%	moderate
March Weather	6°C (43°F)	116 mm (4.6 inches)	76%	high
April Weather	9°C (49°F)	129 mm (5.1 inches)	78%	very high
May Weather	14°C (58°F)	133 mm (5.2 inches)	86%	very high
June Weather	18°C (65°F)	146 mm (5.8 inches)	90%	very high
July Weather	23°C (74°F)	160 mm (6.3 inches)	93%	very high
August Weather	25°C (78°F)	199 mm (7.8 inches)	92%	extreme
September Weather	22°C (72°F)	165 mm (6.5 inches)	84%	very high
October Weather	17°C (63°F)	218 mm (8.6 inches)	80%	high
November Weather	11°C (53°F)	194 mm (7.6 inches)	76%	moderate
December Weather	6°C (42°F)	256 mm (10.1 inches)	78%	low