January Weather in Ashiya, Japan

Last updated: August 23, 2025

In Ashiya, Japan, the average temperature for January hovers around 6°C (43°F), with a minimum dipping to -2°C (29°F) and a maximum reaching 16°C (61°F). Expect some precipitation, totaling 45 mm (1.8 in) over about 5 days, while the average humidity levels are around 82%, making for a generally cool and damp atmosphere.

January Temperature in Ashiya

In January in Ashiya, the average temperature is 6°C (43°F). Maximum temperatures can reach 16°C (61°F), while the minimum can drop as low as -2°C (29°F). Be prepared for a mix of cool and mild weather if you're traveling during this time.

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

The chart illustrates January temperature patterns in Ashiya, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ashiya, January typically has an average temperature of 6°C (43°F), with highs reaching up to 16°C (61°F) and lows dropping to around -2°C (29°F).

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

January Precipitation in Ashiya

In Ashiya in January, the total precipitation amount is 45 mm (1.8 in) over a span of 5 days.

January Precipitation Trends in Ashiya

The chart displays monthly precipitation patterns in Ashiya, 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 Ashiya, January typically receives around 45 mm (1.8 inches) of precipitation spread over approximately 5 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 Ashiya

In Ashiya in January, humidity is 82%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration feel less invigorating and more uncomfortable, as the heavy air can leave you feeling sluggish and fatigued during your travels.

January Average Humidity in Ashiya

This chart illustrates the average monthly humidity levels in Ashiya, 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 Ashiya is approximately 82%, 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 Ashiya

In Ashiya 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 Ashiya for better planning.

Maximum UV Index Levels in Ashiya for January

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

Data source: Ashiya 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 Ashiya Compares to Other Months

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

This table compares monthly weather conditions in Ashiya, 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 (43°F)	45 mm (1.8 inches)	82%	moderate
February Weather	6°C (44°F)	57 mm (2.3 inches)	79%	high
March Weather	10°C (51°F)	109 mm (4.3 inches)	74%	very high
April Weather	15°C (59°F)	137 mm (5.4 inches)	76%	extreme
May Weather	20°C (68°F)	154 mm (6.0 inches)	83%	extreme
June Weather	23°C (74°F)	153 mm (6.0 inches)	87%	extreme
July Weather	27°C (81°F)	317 mm (12.5 inches)	93%	extreme
August Weather	29°C (84°F)	210 mm (8.3 inches)	91%	extreme
September Weather	25°C (77°F)	197 mm (7.8 inches)	87%	very high
October Weather	20°C (68°F)	235 mm (9.2 inches)	85%	high
November Weather	14°C (57°F)	47 mm (1.9 inches)	83%	moderate
December Weather	8°C (48°F)	60 mm (2.3 inches)	83%	moderate