September Weather in Ikoma, Japan

Last updated: August 23, 2025

The average temperature in Ikoma, Japan during September is a comfortable 25°C (78°F). However, temperatures can swing from a refreshing 15°C (59°F) to a sizzling 38°C (100°F). Expect around 142 mm (5.6 in) of precipitation spread over 13 days, contributing to a high average humidity of 87%.

September Temperature in Ikoma

In September in Ikoma, the average temperature is 25°C (78°F). Maximums can reach 38°C (100°F), while minimums can drop to as low as 15°C (59°F). Be prepared for warm days and cool evenings when planning your travels!

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

The chart illustrates September temperature patterns in Ikoma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ikoma, September typically has an average temperature of 25°C (78°F), with highs reaching up to 38°C (100°F) and lows dropping to around 15°C (59°F).

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

September Precipitation in Ikoma

In Ikoma in September, the precipitation amount is 142 mm (5.6 in) spread over 13 days.

September Precipitation Trends in Ikoma

The chart displays monthly precipitation patterns in Ikoma, 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 Ikoma, September typically receives around 142 mm (5.6 inches) of precipitation spread over approximately 13 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 Ikoma

In Ikoma in September, humidity is 87%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities particularly strenuous and requiring frequent breaks for hydration and shade.

September Average Humidity in Ikoma

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

In Ikoma 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 Ikoma.

Maximum UV Index Levels in Ikoma for September

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

Data source: Ikoma 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 Ikoma Compares to Other Months

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

This table compares monthly weather conditions in Ikoma, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	48 mm (1.9 inches)	82%	moderate
February Weather	6°C (43°F)	60 mm (2.4 inches)	79%	high
March Weather	10°C (51°F)	110 mm (4.3 inches)	74%	very high
April Weather	15°C (59°F)	129 mm (5.1 inches)	76%	extreme
May Weather	20°C (68°F)	144 mm (5.7 inches)	83%	extreme
June Weather	24°C (75°F)	140 mm (5.5 inches)	87%	extreme
July Weather	28°C (82°F)	245 mm (9.7 inches)	93%	extreme
August Weather	29°C (85°F)	150 mm (5.9 inches)	91%	extreme
September Weather	25°C (78°F)	142 mm (5.6 inches)	87%	very high
October Weather	19°C (67°F)	226 mm (8.9 inches)	85%	high
November Weather	13°C (56°F)	40 mm (1.6 inches)	83%	moderate
December Weather	8°C (46°F)	55 mm (2.2 inches)	83%	moderate