September Weather in Yasu, Japan

Last updated: August 23, 2025

In Yasu, Japan, the average temperature in September hovers around 24°C (75°F), with a minimum of 14°C (57°F) and a maximum reaching up to 35°C (96°F). The region experiences precipitation of about 136 mm (5.4 in) spread over 13 days, accompanied by a high humidity level of 87%. Perfect for those who enjoy a warm and slightly rainy climate!

September Temperature in Yasu

In September in Yasu, the average temperature is 24°C (75°F). Maximum temperatures can reach 35°C (96°F), while minimums can drop to as low as 14°C (57°F). This makes Yasu an ideal destination for travelers looking to enjoy warm weather while still having the option for cooler evenings.

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

The chart illustrates September temperature patterns in Yasu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yasu, September typically has an average temperature of 24°C (75°F), with highs reaching up to 35°C (96°F) and lows dropping to around 14°C (57°F).

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

September Precipitation in Yasu

In Yasu in September, the precipitation amount reaches 136 mm (5.4 in) over a span of 13 days.

September Precipitation Trends in Yasu

The chart displays monthly precipitation patterns in Yasu, 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 Yasu, September typically receives around 136 mm (5.4 inches) of precipitation spread over approximately 13 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 Yasu

In Yasu in September, humidity is 87%. With an average temperature of 24°C (75°F), this humidity feels like a warm, sticky embrace that clings to your skin, making outdoor activities feel heavier and more exhausting, and the air thickens, leaving you longing for shade and refreshing breezes as you navigate your adventures.

September Average Humidity in Yasu

This chart illustrates the average monthly humidity levels in Yasu, 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 Yasu is approximately 87%, 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 Yasu

In Yasu 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 Yasu.

Maximum UV Index Levels in Yasu for September

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

Data source: Yasu 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 Yasu Compares to Other Months

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

This table compares monthly weather conditions in Yasu, 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)	52 mm (2.0 inches)	82%	moderate
February Weather	5°C (41°F)	59 mm (2.3 inches)	79%	high
March Weather	9°C (49°F)	116 mm (4.6 inches)	74%	very high
April Weather	14°C (57°F)	138 mm (5.4 inches)	76%	very high
May Weather	19°C (66°F)	144 mm (5.7 inches)	83%	extreme
June Weather	22°C (72°F)	141 mm (5.6 inches)	87%	extreme
July Weather	26°C (80°F)	253 mm (10.0 inches)	93%	extreme
August Weather	28°C (83°F)	168 mm (6.6 inches)	91%	extreme
September Weather	24°C (75°F)	136 mm (5.4 inches)	87%	very high
October Weather	18°C (65°F)	227 mm (8.9 inches)	85%	high
November Weather	12°C (54°F)	41 mm (1.6 inches)	83%	moderate
December Weather	6°C (44°F)	63 mm (2.5 inches)	83%	moderate