September Weather in Akaiwa, Japan

Last updated: August 23, 2025

In September, the average temperature in Akaiwa, Japan is a pleasant 25°C (77°F). Expect temperatures to range from a cool 12°C (54°F) to a scorching 36°C (97°F). During this month, precipitation typically reaches 203 mm (8.0 in) over about 12 days, while the average humidity can be quite high at 87%. Prepare accordingly for a mix of warm days and occasional rain!

September Temperature in Akaiwa

In September in Akaiwa, the average temperature is 25°C (77°F). Maximum temperatures can reach 36°C (97°F), while minimums can drop to as low as 12°C (54°F). This makes it a perfect time for travelers to enjoy a variety of outdoor activities, but it's advisable to pack layers to stay comfortable throughout the day.

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

The chart illustrates September temperature patterns in Akaiwa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Akaiwa, September typically has an average temperature of 25°C (77°F), with highs reaching up to 36°C (97°F) and lows dropping to around 12°C (54°F).

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

September Precipitation in Akaiwa

In Akaiwa in September, the total precipitation amount reached 203 mm (8.0 in) over the course of 12 days.

September Precipitation Trends in Akaiwa

The chart displays monthly precipitation patterns in Akaiwa, 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 Akaiwa, September typically receives around 203 mm (8.0 inches) of precipitation spread over approximately 12 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 Akaiwa

In Akaiwa in September, humidity is 87%. With an average temperature of 25°C (77°F), this humidity feels like a thick, warm blanket enveloping you, making travel a challenge as sweat clings to your skin and the air feels heavy and stifling.

September Average Humidity in Akaiwa

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

In Akaiwa 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 Akaiwa.

Maximum UV Index Levels in Akaiwa for September

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

Data source: Akaiwa 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 Akaiwa Compares to Other Months

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

This table compares monthly weather conditions in Akaiwa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (42°F)	33 mm (1.3 inches)	82%	moderate
February Weather	6°C (43°F)	47 mm (1.9 inches)	79%	high
March Weather	10°C (51°F)	94 mm (3.7 inches)	73%	very high
April Weather	15°C (59°F)	119 mm (4.7 inches)	74%	extreme
May Weather	20°C (68°F)	114 mm (4.5 inches)	84%	extreme
June Weather	23°C (74°F)	153 mm (6.0 inches)	86%	extreme
July Weather	27°C (81°F)	291 mm (11.5 inches)	92%	extreme
August Weather	29°C (85°F)	171 mm (6.7 inches)	92%	extreme
September Weather	25°C (77°F)	203 mm (8.0 inches)	87%	very high
October Weather	19°C (67°F)	169 mm (6.7 inches)	85%	high
November Weather	13°C (55°F)	30 mm (1.2 inches)	84%	moderate
December Weather	8°C (46°F)	45 mm (1.8 inches)	82%	moderate