September Weather in Yanaizu, Japan

Last updated: August 23, 2025

In September, the average temperature in Yanaizu, Japan hovers around 19°C (67°F), with a minimum of 8°C (47°F) and a maximum reaching 32°C (89°F). Expect a substantial precipitation of 126 mm (5.0 in) spread over 15 days, and a high average humidity of 89%. Stay prepared for a mix of warm days and wet conditions!

September Temperature in Yanaizu

In September in Yanaizu, the average temperature is 19°C (67°F). Maximum temperatures can reach 32°C (89°F), while the minimum can drop as low as 8°C (47°F). This makes it a great time for travelers to enjoy mild weather, perfect for exploring and outdoor activities.

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

The chart illustrates September temperature patterns in Yanaizu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yanaizu, September typically has an average temperature of 19°C (67°F), with highs reaching up to 32°C (89°F) and lows dropping to around 8°C (47°F).

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

September Precipitation in Yanaizu

In Yanaizu in September, the precipitation amount is 126 mm (5.0 in) spread over 15 days.

September Precipitation Trends in Yanaizu

The chart displays monthly precipitation patterns in Yanaizu, 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 Yanaizu, September typically receives around 126 mm (5.0 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 Yanaizu

In Yanaizu in September, humidity is 89%. With an average temperature of 19°C (67°F), this humidity feels like a warm, muggy blanket enveloping you, making outdoor activities uncomfortable and encouraging travelers to seek shaded areas or indoor attractions during the hottest parts of the day.

September Average Humidity in Yanaizu

This chart illustrates the average monthly humidity levels in Yanaizu, 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 Yanaizu is approximately 89%, 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 Yanaizu

In Yanaizu in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Yanaizu.

Maximum UV Index Levels in Yanaizu for September

The chart shows the monthly maximum UV Index (UVI) for Yanaizu 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 Yanaizu typically reaches 9, which falls under the very high exposure category.

Data source: Yanaizu 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 Yanaizu Compares to Other Months

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

This table compares monthly weather conditions in Yanaizu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	157 mm (6.2 inches)	88%	moderate
February Weather	-1°C (31°F)	155 mm (6.1 inches)	86%	moderate
March Weather	3°C (38°F)	147 mm (5.8 inches)	81%	very high
April Weather	9°C (48°F)	127 mm (5.0 inches)	78%	very high
May Weather	15°C (59°F)	111 mm (4.4 inches)	81%	very high
June Weather	18°C (65°F)	117 mm (4.6 inches)	88%	extreme
July Weather	23°C (73°F)	256 mm (10.1 inches)	92%	extreme
August Weather	24°C (76°F)	153 mm (6.0 inches)	92%	extreme
September Weather	19°C (67°F)	126 mm (5.0 inches)	89%	very high
October Weather	14°C (57°F)	168 mm (6.6 inches)	87%	high
November Weather	8°C (46°F)	100 mm (3.9 inches)	85%	moderate
December Weather	1°C (35°F)	176 mm (6.9 inches)	86%	moderate