September Weather in Atsugi, Japan

Last updated: August 23, 2025

In September, the average temperature in Atsugi, Japan is a pleasant 22°C (73°F). Visitors can expect a range from a cool 13°C (56°F) to a warm 34°C (93°F). However, it's wise to prepare for some wet days, as precipitation averages 221 mm (8.7 in) over 20 days. With an average humidity of 86%, the air can feel quite humid, so dress accordingly!

September Temperature in Atsugi

In September in Atsugi, the average temperature is 22°C (73°F). Maximums can reach 34°C (93°F) and minimums can be as low as 13°C (56°F). This range makes it an ideal time for travelers to enjoy outdoor activities while still having the option to unwind in cooler settings.

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

The chart illustrates September 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, September typically has an average temperature of 22°C (73°F), with highs reaching up to 34°C (93°F) and lows dropping to around 13°C (56°F).

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

September Precipitation in Atsugi

In Atsugi in September, the total precipitation amount is 221 mm (8.7 in) spread over 20 days.

September Precipitation Trends in Atsugi

The chart displays monthly precipitation patterns in Atsugi, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Atsugi, September typically receives around 221 mm (8.7 inches) of precipitation spread over approximately 20 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Atsugi

In Atsugi in September, humidity is 86%. With an average temperature of 22°C (73°F), this humidity feels like stepping into a warm, damp embrace that can quickly lead to discomfort while traveling, making you feel sticky and clammy, and often requiring frequent breaks to cool down.

September Average Humidity in Atsugi

This chart illustrates the average monthly humidity levels in Atsugi, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Atsugi is approximately 86%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Atsugi

In Atsugi in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Atsugi.

Maximum UV Index Levels in Atsugi for September

The chart shows the monthly maximum UV Index (UVI) for Atsugi in September, 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 September, the maximum UV index in Atsugi typically reaches 10, which falls under the very high exposure category.

Data source: Atsugi September 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 September 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 September’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 September’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