January Weather in Aka, Japan

Last updated: August 23, 2025

In January, the average temperature in Aka, Japan is a cool 6°C (42°F). Expect lows of -4°C (25°F) and highs of 17°C (63°F), making it a month of contrasts. With 53 mm (2.1 in) of precipitation spread over 7 days, you'll want to keep an umbrella handy. The average humidity sits at a notable 75%, adding to the chilly ambiance.

January Temperature in Aka

In January in Aka, the average temperature is 6°C (42°F). The maximum can reach 17°C (63°F), while the minimum can drop to as low as -4°C (25°F). It's advisable to pack layers to stay comfortable during your travels.

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

The chart illustrates January temperature patterns in Aka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Aka, January typically has an average temperature of 6°C (42°F), with highs reaching up to 17°C (63°F) and lows dropping to around -4°C (25°F).

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

January Precipitation in Aka

In Aka in January, the total precipitation amount is 53 mm (2.1 in) spread over a period of 7 days.

January Precipitation Trends in Aka

The chart displays monthly precipitation patterns in Aka, 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 Aka, January typically receives around 53 mm (2.1 inches) of precipitation spread over approximately 7 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 Aka

In Aka in January, humidity is 75%. With an average temperature of 6°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration uncomfortable and necessitating the need for warm layers and waterproof gear while traveling.

January Average Humidity in Aka

This chart illustrates the average monthly humidity levels in Aka, 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 Aka is approximately 75%, 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 Aka

In Aka 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 Aka for better planning.

Maximum UV Index Levels in Aka for January

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

Data source: Aka 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 Aka Compares to Other Months

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

This table compares monthly weather conditions in Aka, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (42°F)	53 mm (2.1 inches)	75%	moderate
February Weather	7°C (44°F)	75 mm (2.9 inches)	71%	high
March Weather	11°C (52°F)	117 mm (4.6 inches)	71%	very high
April Weather	15°C (59°F)	112 mm (4.4 inches)	78%	extreme
May Weather	20°C (68°F)	162 mm (6.4 inches)	84%	extreme
June Weather	23°C (74°F)	200 mm (7.9 inches)	86%	extreme
July Weather	27°C (80°F)	356 mm (14.0 inches)	92%	extreme
August Weather	28°C (83°F)	269 mm (10.6 inches)	91%	extreme
September Weather	24°C (76°F)	189 mm (7.4 inches)	84%	extreme
October Weather	19°C (66°F)	115 mm (4.5 inches)	83%	high
November Weather	13°C (55°F)	50 mm (1.9 inches)	81%	high
December Weather	7°C (45°F)	61 mm (2.4 inches)	79%	moderate