September Weather in Youkaichi, Japan

Last updated: August 23, 2025

In September, the average temperature in Youkaichi, Japan is a pleasant 24°C (75°F). Expect temperatures to range from a cool 12°C (54°F) to a warm 35°C (96°F). With an average precipitation of 168 mm (6.6 in) spread over 15 days, and humidity levels soaring to 87%, it's wise to prepare for occasional rain while enjoying the warmth.

September Temperature in Youkaichi

In September in Youkaichi, the average temperature is 24°C (75°F). The maximum can reach 35°C (96°F) and the minimum can be as low as 12°C (54°F). This weather makes it ideal for travelers seeking pleasant, warm conditions with opportunities to enjoy both the sun and cooler evenings.

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

The chart illustrates September temperature patterns in Youkaichi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Youkaichi, 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 12°C (54°F).

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

September Precipitation in Youkaichi

In Youkaichi in September, the total precipitation amount is 168 mm (6.6 in) collected over a period of 15 days.

September Precipitation Trends in Youkaichi

The chart displays monthly precipitation patterns in Youkaichi, 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 Youkaichi, September typically receives around 168 mm (6.6 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 Youkaichi

In Youkaichi 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 Youkaichi

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

In Youkaichi 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 Youkaichi.

Maximum UV Index Levels in Youkaichi for September

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

Data source: Youkaichi 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 Youkaichi Compares to Other Months

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

This table compares monthly weather conditions in Youkaichi, 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)	53 mm (2.1 inches)	82%	moderate
February Weather	5°C (40°F)	58 mm (2.3 inches)	79%	high
March Weather	9°C (48°F)	136 mm (5.3 inches)	74%	very high
April Weather	13°C (56°F)	146 mm (5.8 inches)	76%	very high
May Weather	19°C (66°F)	163 mm (6.4 inches)	83%	extreme
June Weather	22°C (72°F)	174 mm (6.8 inches)	87%	extreme
July Weather	26°C (79°F)	301 mm (11.8 inches)	93%	extreme
August Weather	28°C (82°F)	207 mm (8.2 inches)	91%	extreme
September Weather	24°C (75°F)	168 mm (6.6 inches)	87%	very high
October Weather	18°C (65°F)	271 mm (10.7 inches)	85%	high
November Weather	12°C (53°F)	47 mm (1.8 inches)	83%	moderate
December Weather	6°C (44°F)	64 mm (2.5 inches)	83%	moderate