September Weather in Motoyama, Japan

Last updated: August 23, 2025

In September, the average temperature in Motoyama, Japan hovers around 23°C (73°F), with a range that can dip to a cool 12°C (54°F) and soar up to a warm 32°C (89°F). Expect about 349 mm (13.8 in) of precipitation spread across 20 days, contributing to the region's 85% humidity. Whether you're planning outdoor activities or cozy indoor retreats, it's a month that offers a little something for everyone!

September Temperature in Motoyama

In September in Motoyama, the average temperature is 23°C (73°F). Maximums can reach 32°C (89°F), while minimums can dip as low as 12°C (54°F). This range makes it an ideal time to explore the outdoors and enjoy various activities in Motoyama.

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

The chart illustrates September temperature patterns in Motoyama, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Motoyama, September typically has an average temperature of 23°C (73°F), with highs reaching up to 32°C (89°F) and lows dropping to around 12°C (54°F).

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

September Precipitation in Motoyama

In Motoyama in September, the precipitation amount is 349 mm (13.8 in) spread over 20 days.

September Precipitation Trends in Motoyama

The chart displays monthly precipitation patterns in Motoyama, 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 Motoyama, September typically receives around 349 mm (13.8 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 Motoyama

In Motoyama in September, humidity is 85%. With an average temperature of 23°C (73°F), this humidity feels like a warm, enveloping blanket, making outdoor activities a bit strenuous and prompting frequent breaks for hydration.

September Average Humidity in Motoyama

This chart illustrates the average monthly humidity levels in Motoyama, 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 Motoyama is approximately 85%, 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 Motoyama

In Motoyama 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 Motoyama.

Maximum UV Index Levels in Motoyama for September

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

Data source: Motoyama 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 Motoyama Compares to Other Months

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

This table compares monthly weather conditions in Motoyama, 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)	66 mm (2.6 inches)	74%	moderate
February Weather	5°C (41°F)	98 mm (3.9 inches)	70%	high
March Weather	9°C (49°F)	162 mm (6.4 inches)	70%	very high
April Weather	13°C (56°F)	179 mm (7.0 inches)	76%	extreme
May Weather	18°C (64°F)	206 mm (8.1 inches)	82%	extreme
June Weather	21°C (70°F)	287 mm (11.3 inches)	86%	extreme
July Weather	25°C (77°F)	547 mm (21.5 inches)	91%	extreme
August Weather	26°C (80°F)	297 mm (11.7 inches)	88%	extreme
September Weather	23°C (73°F)	349 mm (13.8 inches)	85%	very high
October Weather	17°C (64°F)	335 mm (13.2 inches)	82%	high
November Weather	11°C (52°F)	78 mm (3.1 inches)	79%	high
December Weather	6°C (43°F)	80 mm (3.2 inches)	77%	moderate