January Weather in Hayashima, Japan

Last updated: August 23, 2025

In January, the average temperature in Hayashima, Japan hovers around 7°C (44°F). Be prepared for fluctuations, as temperatures can dip to a chilly -1°C (30°F) or soar to a pleasant 15°C (59°F). Expect about 41 mm (1.6 in) of precipitation spread over 5 days, and keep in mind the average humidity level stands at a high 82%, adding to the overall atmosphere of the season.

January Temperature in Hayashima

In January in Hayashima, the average temperature is 7°C (44°F), with maximums reaching 15°C (59°F) and minimums dropping as low as -1°C (30°F). Travelers should be prepared for a mix of cool and chilly weather during this time.

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

The chart illustrates January temperature patterns in Hayashima, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hayashima, January typically has an average temperature of 7°C (44°F), with highs reaching up to 15°C (59°F) and lows dropping to around -1°C (30°F).

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

January Precipitation in Hayashima

In Hayashima in January, the precipitation amount is 41 mm (1.6 in) over a period of 5 days.

January Precipitation Trends in Hayashima

The chart displays monthly precipitation patterns in Hayashima, 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 Hayashima, January typically receives around 41 mm (1.6 inches) of precipitation spread over approximately 5 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 Hayashima

In Hayashima in January, humidity is 82%. With an average temperature of 7°C (44°F), this humidity feels like an unwelcoming chill that seeps into your bones, making outdoor exploration feel damp and cumbersome.

January Average Humidity in Hayashima

This chart illustrates the average monthly humidity levels in Hayashima, 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 Hayashima 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 Hayashima

In Hayashima 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 Hayashima for better planning.

Maximum UV Index Levels in Hayashima for January

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

Data source: Hayashima 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 Hayashima Compares to Other Months

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

This table compares monthly weather conditions in Hayashima, 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 (44°F)	41 mm (1.6 inches)	82%	moderate
February Weather	7°C (44°F)	56 mm (2.2 inches)	79%	moderate
March Weather	10°C (50°F)	100 mm (3.9 inches)	73%	very high
April Weather	14°C (57°F)	126 mm (5.0 inches)	74%	very high
May Weather	18°C (65°F)	121 mm (4.8 inches)	84%	extreme
June Weather	22°C (72°F)	150 mm (5.9 inches)	86%	extreme
July Weather	26°C (79°F)	279 mm (11.0 inches)	92%	extreme
August Weather	28°C (83°F)	144 mm (5.7 inches)	92%	extreme
September Weather	25°C (77°F)	187 mm (7.3 inches)	87%	very high
October Weather	20°C (68°F)	193 mm (7.6 inches)	85%	high
November Weather	14°C (58°F)	38 mm (1.5 inches)	84%	moderate
December Weather	9°C (48°F)	50 mm (2.0 inches)	82%	moderate