September Weather in Iida, Japan

Last updated: August 23, 2025

In September, the average temperature in Iida, Japan hovers around 19°C (67°F), with a minimum of 7°C (45°F) and a peak of 31°C (87°F). Expect a substantial amount of rainfall, averaging 242 mm (9.5 in) over approximately 18 days, coupled with an average humidity of 86%. Stay prepared to embrace the cozy yet moist climate!

September Temperature in Iida

In September in Iida, the average temperature is 19°C (67°F). The maximum can reach 31°C (87°F), while the minimum can be as low as 7°C (45°F). It's a great time to visit for those who enjoy mild weather with occasional warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Iida, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iida, September typically has an average temperature of 19°C (67°F), with highs reaching up to 31°C (87°F) and lows dropping to around 7°C (45°F).

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

September Precipitation in Iida

In Iida in September, the precipitation amount is 242 mm (9.5 in) over a period of 18 days.

September Precipitation Trends in Iida

The chart displays monthly precipitation patterns in Iida, 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 Iida, September typically receives around 242 mm (9.5 inches) of precipitation spread over approximately 18 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 Iida

In Iida in September humidity is 86%. With an average temperature of 19°C (67°F), this humidity feels like traveling through a thick, warm blanket, making the air feel heavy and sticky, which can be quite uncomfortable for outdoor activities.

September Average Humidity in Iida

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

In Iida 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 Iida.

Maximum UV Index Levels in Iida for September

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

Data source: Iida 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 Iida Compares to Other Months

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

This table compares monthly weather conditions in Iida, 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)	90 mm (3.5 inches)	76%	moderate
February Weather	0°C (32°F)	102 mm (4.0 inches)	74%	high
March Weather	5°C (41°F)	181 mm (7.1 inches)	70%	very high
April Weather	9°C (49°F)	200 mm (7.9 inches)	74%	very high
May Weather	14°C (58°F)	218 mm (8.6 inches)	81%	extreme
June Weather	18°C (64°F)	223 mm (8.8 inches)	88%	extreme
July Weather	22°C (71°F)	507 mm (20.0 inches)	93%	extreme
August Weather	23°C (74°F)	256 mm (10.1 inches)	90%	extreme
September Weather	19°C (67°F)	242 mm (9.5 inches)	86%	very high
October Weather	14°C (57°F)	264 mm (10.4 inches)	83%	high
November Weather	7°C (46°F)	85 mm (3.3 inches)	80%	moderate
December Weather	2°C (36°F)	95 mm (3.7 inches)	78%	moderate