January Weather in Atsugi, Japan

Last updated: August 23, 2025

In January, the average temperature in Atsugi, Japan hovers around 4°C (39°F). Expect minimums dipping to -9°C (17°F) and maximums reaching up to 19°C (66°F). During this month, precipitation averages 57 mm (2.2 in) spread over 6 days, contributing to a relatively high humidity level of 76%.

January Temperature in Atsugi

In January in Atsugi, the average temperature is 4°C (39°F), with maximums reaching 19°C (66°F) and minimums dropping as low as -9°C (17°F). Be sure to pack layers and prepare for varying weather conditions while exploring the area!

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

The chart illustrates January temperature patterns in Atsugi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Atsugi, January typically has an average temperature of 4°C (39°F), with highs reaching up to 19°C (66°F) and lows dropping to around -9°C (17°F).

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

January Precipitation in Atsugi

In Atsugi in January, the precipitation amount is 57 mm (2.2 in) over a span of 6 days.

January Precipitation Trends in Atsugi

The chart displays monthly precipitation patterns in Atsugi, 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 Atsugi, January typically receives around 57 mm (2.2 inches) of precipitation spread over approximately 6 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 Atsugi

In Atsugi in January humidity is 76%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making it quite uncomfortable for traveling.

January Average Humidity in Atsugi

This chart illustrates the average monthly humidity levels in Atsugi, 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 Atsugi is approximately 76%, 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 Atsugi

In Atsugi 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 Atsugi for better planning.

Maximum UV Index Levels in Atsugi for January

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

Data source: Atsugi 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 Atsugi Compares to Other Months

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

This table compares monthly weather conditions in Atsugi, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	57 mm (2.2 inches)	76%	moderate
February Weather	5°C (41°F)	66 mm (2.6 inches)	74%	high
March Weather	9°C (48°F)	177 mm (7.0 inches)	70%	very high
April Weather	13°C (56°F)	148 mm (5.8 inches)	74%	very high
May Weather	18°C (65°F)	140 mm (5.5 inches)	81%	extreme
June Weather	21°C (70°F)	198 mm (7.8 inches)	88%	extreme
July Weather	25°C (77°F)	277 mm (10.9 inches)	93%	extreme
August Weather	27°C (80°F)	157 mm (6.2 inches)	90%	extreme
September Weather	22°C (73°F)	221 mm (8.7 inches)	86%	very high
October Weather	17°C (63°F)	317 mm (12.5 inches)	83%	high
November Weather	12°C (54°F)	84 mm (3.3 inches)	80%	moderate
December Weather	7°C (44°F)	68 mm (2.7 inches)	78%	moderate