September Weather in Iheya, Japan

Last updated: August 23, 2025

In September, the average temperature in Iheya, Japan is a warm 28°C (82°F). Daily highs can soar to 30°C (86°F), while the evenings cool down to a minimum of 24°C (76°F). Expect a precipitation amount of 204 mm (8.0 in) over 20 days, contributing to a high average humidity of 82%. Stay prepared for a tropical experience!

September Temperature in Iheya

In September in Iheya, the average temperature is 28°C (82°F). Maximum temperatures can reach 30°C (86°F), while minimums can drop to as low as 24°C (76°F). This mild and warm climate makes Iheya an ideal destination for travelers looking to enjoy pleasant weather and outdoor activities.

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

The chart illustrates September temperature patterns in Iheya, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iheya, September typically has an average temperature of 28°C (82°F), with highs reaching up to 30°C (86°F) and lows dropping to around 24°C (76°F).

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

September Precipitation in Iheya

In Iheya in September, the precipitation amount is 204 mm (8.0 in) over the course of 20 days.

September Precipitation Trends in Iheya

The chart displays monthly precipitation patterns in Iheya, 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 Iheya, September typically receives around 204 mm (8.0 inches) of precipitation spread over approximately 20 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Iheya

In Iheya in September humidity is 82%. With an average temperature of 28°C (82°F), this humidity feels like walking through a warm, dense blanket, making outdoor activities a challenge and necessitating frequent breaks to stay hydrated.

September Average Humidity in Iheya

This chart illustrates the average monthly humidity levels in Iheya, 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 Iheya is approximately 82%, 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 Iheya

In Iheya in September, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Iheya.

Maximum UV Index Levels in Iheya for September

The chart shows the monthly maximum UV Index (UVI) for Iheya 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 Iheya typically reaches 12, which falls under the extreme exposure category.

Data source: Iheya 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 Iheya Compares to Other Months

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

This table compares monthly weather conditions in Iheya, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	18°C (64°F)	103 mm (4.1 inches)	71%	high
February Weather	18°C (64°F)	108 mm (4.3 inches)	71%	very high
March Weather	19°C (67°F)	132 mm (5.2 inches)	76%	extreme
April Weather	21°C (70°F)	135 mm (5.3 inches)	82%	extreme
May Weather	24°C (75°F)	214 mm (8.4 inches)	84%	extreme
June Weather	26°C (79°F)	392 mm (15.4 inches)	86%	extreme
July Weather	28°C (83°F)	173 mm (6.8 inches)	86%	extreme
August Weather	28°C (83°F)	161 mm (6.3 inches)	82%	extreme
September Weather	28°C (82°F)	204 mm (8.0 inches)	82%	extreme
October Weather	26°C (78°F)	135 mm (5.3 inches)	80%	very high
November Weather	23°C (73°F)	107 mm (4.2 inches)	79%	very high
December Weather	20°C (67°F)	141 mm (5.5 inches)	75%	high