September Weather in Yawatahama, Japan

Last updated: August 23, 2025

In September, the average temperature in Yawatahama, Japan hovers around 25°C (77°F), making it a delightful time to explore. The temperature can fluctuate from a minimum of 15°C (59°F) to a maximum of 35°C (96°F), offering a range of warm days. Expect about 187 mm (7.3 in) of precipitation spread over 15 days, and be prepared for high humidity, averaging at 84%.

September Temperature in Yawatahama

In September in Yawatahama, the average temperature is 25°C (77°F). Maximums can reach 35°C (96°F) and minimums can be as low as 15°C (59°F). This makes Yawatahama an ideal destination for travelers seeking warm weather and outdoor adventures.

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

The chart illustrates September temperature patterns in Yawatahama, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yawatahama, September typically has an average temperature of 25°C (77°F), with highs reaching up to 35°C (96°F) and lows dropping to around 15°C (59°F).

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

September Precipitation in Yawatahama

In Yawatahama in September, the total precipitation amount is 187 mm (7.3 in) spread over a period of 15 days.

September Precipitation Trends in Yawatahama

The chart displays monthly precipitation patterns in Yawatahama, 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 Yawatahama, September typically receives around 187 mm (7.3 inches) of precipitation spread over approximately 15 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Yawatahama

In Yawatahama in September, humidity is 84%. With an average temperature of 25°C (77°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities challenging and prompting travelers to seek shade and stay hydrated.

September Average Humidity in Yawatahama

This chart illustrates the average monthly humidity levels in Yawatahama, 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 Yawatahama is approximately 84%, 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 Yawatahama

In Yawatahama 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 Yawatahama.

Maximum UV Index Levels in Yawatahama for September

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

Data source: Yawatahama 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 Yawatahama Compares to Other Months

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

This table compares monthly weather conditions in Yawatahama, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	53 mm (2.1 inches)	75%	moderate
February Weather	7°C (45°F)	84 mm (3.3 inches)	71%	high
March Weather	11°C (53°F)	129 mm (5.1 inches)	71%	very high
April Weather	15°C (60°F)	126 mm (4.9 inches)	78%	very high
May Weather	20°C (68°F)	149 mm (5.9 inches)	84%	extreme
June Weather	23°C (74°F)	204 mm (8.0 inches)	86%	extreme
July Weather	27°C (80°F)	353 mm (13.9 inches)	92%	extreme
August Weather	28°C (83°F)	184 mm (7.3 inches)	91%	extreme
September Weather	25°C (77°F)	187 mm (7.3 inches)	84%	very high
October Weather	20°C (68°F)	191 mm (7.5 inches)	83%	high
November Weather	14°C (57°F)	59 mm (2.3 inches)	81%	high
December Weather	9°C (48°F)	64 mm (2.5 inches)	79%	moderate