September Weather in Yaizu, Japan

Last updated: August 23, 2025

In September, the average temperature in Yaizu, Japan is a pleasant 25°C (77°F). Temperatures can vary, with a minimum of 20°C (68°F) and a maximum reaching 31°C (88°F). Expect significant rainfall, with 255 mm (10.0 in) over approximately 20 days, and a high average humidity of 86%.

September Temperature in Yaizu

In September in Yaizu, the average temperature is a pleasant 25°C (77°F). Maximum temperatures can soar to 31°C (88°F), while the minimum can dip to around 20°C (68°F). This mild climate makes Yaizu an ideal destination for outdoor activities and exploration during this time of year.

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

The chart illustrates September temperature patterns in Yaizu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yaizu, September typically has an average temperature of 25°C (77°F), with highs reaching up to 31°C (88°F) and lows dropping to around 20°C (68°F).

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

September Precipitation in Yaizu

In Yaizu in September, the precipitation amount is 255 mm (10.0 in) spread over a duration of 20 days.

September Precipitation Trends in Yaizu

The chart displays monthly precipitation patterns in Yaizu, 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 Yaizu, September typically receives around 255 mm (10.0 inches) of precipitation spread over approximately 20 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 Yaizu

In Yaizu in September, humidity is 86%. With an average temperature of 25°C (77°F), this humidity feels like you are wrapped in a warm, heavy blanket, making travel a bit challenging as you may find yourself frequently seeking shade and hydration while navigating the vibrant streets.

September Average Humidity in Yaizu

This chart illustrates the average monthly humidity levels in Yaizu, 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 Yaizu 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 Yaizu

In Yaizu 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 Yaizu.

Maximum UV Index Levels in Yaizu for September

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

Data source: Yaizu 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 Yaizu Compares to Other Months

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

This table compares monthly weather conditions in Yaizu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	65 mm (2.5 inches)	76%	moderate
February Weather	8°C (47°F)	88 mm (3.5 inches)	74%	moderate
March Weather	12°C (53°F)	196 mm (7.7 inches)	70%	very high
April Weather	15°C (59°F)	186 mm (7.3 inches)	74%	very high
May Weather	19°C (66°F)	223 mm (8.8 inches)	81%	extreme
June Weather	22°C (72°F)	295 mm (11.6 inches)	88%	extreme
July Weather	25°C (78°F)	420 mm (16.5 inches)	93%	extreme
August Weather	27°C (82°F)	205 mm (8.1 inches)	90%	extreme
September Weather	25°C (77°F)	255 mm (10.0 inches)	86%	very high
October Weather	21°C (69°F)	314 mm (12.4 inches)	83%	high
November Weather	16°C (61°F)	108 mm (4.3 inches)	80%	moderate
December Weather	11°C (52°F)	82 mm (3.2 inches)	78%	moderate