September Weather in Yoshikawa, Japan

Last updated: August 23, 2025

In Yoshikawa, Japan, the average temperature in September hovers around 24°C (75°F). Weather can vary significantly, with minimums dipping to 13°C (55°F) and maximums soaring to 36°C (97°F). Expect some rain, as 167 mm (6.6 in) of precipitation falls over approximately 17 days, contributing to a high average humidity of 86%.

September Temperature in Yoshikawa

In September in Yoshikawa, the average temperature is 24°C (75°F). Maximums can reach 36°C (97°F), while minimums can dip as low as 13°C (55°F). This makes it a perfect time for travelers to enjoy a comfortable climate with warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Yoshikawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yoshikawa, September typically has an average temperature of 24°C (75°F), with highs reaching up to 36°C (97°F) and lows dropping to around 13°C (55°F).

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

September Precipitation in Yoshikawa

In Yoshikawa in September, the precipitation amount is 167 mm (6.6 in) over the course of 17 days.

September Precipitation Trends in Yoshikawa

The chart displays monthly precipitation patterns in Yoshikawa, 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 Yoshikawa, September typically receives around 167 mm (6.6 inches) of precipitation spread over approximately 17 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 Yoshikawa

In Yoshikawa in September, humidity is 86%. With an average temperature of 24°C (75°F), this humidity feels like a warm, sticky embrace, making outdoor activities somewhat uncomfortable and requiring travelers to stay hydrated and take breaks in the shade.

September Average Humidity in Yoshikawa

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

In Yoshikawa 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 Yoshikawa.

Maximum UV Index Levels in Yoshikawa for September

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

Data source: Yoshikawa 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 Yoshikawa Compares to Other Months

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

This table compares monthly weather conditions in Yoshikawa, 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 (40°F)	39 mm (1.5 inches)	76%	moderate
February Weather	6°C (43°F)	38 mm (1.5 inches)	74%	moderate
March Weather	10°C (51°F)	122 mm (4.8 inches)	70%	very high
April Weather	14°C (58°F)	111 mm (4.4 inches)	74%	very high
May Weather	20°C (68°F)	111 mm (4.4 inches)	81%	very high
June Weather	23°C (73°F)	134 mm (5.3 inches)	88%	very high
July Weather	26°C (80°F)	225 mm (8.8 inches)	93%	extreme
August Weather	28°C (83°F)	112 mm (4.4 inches)	90%	very high
September Weather	24°C (75°F)	167 mm (6.6 inches)	86%	very high
October Weather	18°C (65°F)	249 mm (9.8 inches)	83%	high
November Weather	13°C (55°F)	63 mm (2.5 inches)	80%	moderate
December Weather	7°C (44°F)	47 mm (1.8 inches)	78%	moderate