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September Weather in Ako, Japan

Last updated: August 23, 2025

The average temperature in Ako, Japan during September is a pleasant 24°C (76°F). Expect lows of around 17°C (64°F) and highs reaching up to 31°C (89°F). Be prepared for some rain, as 222 mm (8.7 in) of precipitation is expected over 13 days. With an average humidity of 87%, it's a month to embrace the tropical feel!

September Temperature in Ako

In September, in Ako, the average temperature is 24°C (76°F). Maximums can reach 31°C (89°F), and minimums can be as low as 17°C (64°F). This pleasant climate makes Ako an ideal destination for outdoor activities and exploration during this time.

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

The chart illustrates September temperature patterns in Ako, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ako, September typically has an average temperature of 24°C (76°F), with highs reaching up to 31°C (89°F) and lows dropping to around 17°C (64°F).
JanFebMarAprMayJunJulAugSepOctNovDec434349566471788276675748
Data source: Temperature data for Ako generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Ako

In Ako in September, the total precipitation amount is 222 mm (8.7 in), occurring over a span of 13 days.

September Precipitation Trends in Ako

The chart displays monthly precipitation patterns in Ako, 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 Ako, September typically receives around 222 mm (8.7 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec39551081301311643031732222113852
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ako

In Ako in September, humidity is 87%. With an average temperature of 24°C (76°F), this humidity feels like a warm, clingy blanket enveloping you, making travel feel sluggish and sticky as you navigate the air thick with moisture.

September Average Humidity in Ako

This chart illustrates the average monthly humidity levels in Ako, 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 Ako is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%73%74%84%86%92%92%87%85%84%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ako

In Ako 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 Ako.

Maximum UV Index Levels in Ako for September

The chart shows the monthly maximum UV Index (UVI) for Ako 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 Ako typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec458111111121110754
Data source: Ako 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 Ako Compares to Other Months

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

This table compares monthly weather conditions in Ako, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)39 mm (1.5 inches)82%moderate
February Weather6°C (43°F)55 mm (2.2 inches)79%moderate
March Weather9°C (49°F)108 mm (4.2 inches)73%very high
April Weather13°C (56°F)130 mm (5.1 inches)74%extreme
May Weather18°C (65°F)131 mm (5.2 inches)84%extreme
June Weather22°C (71°F)164 mm (6.5 inches)86%extreme
July Weather26°C (78°F)303 mm (11.9 inches)92%extreme
August Weather28°C (82°F)173 mm (6.8 inches)92%extreme
September Weather24°C (76°F)222 mm (8.7 inches)87%very high
October Weather19°C (67°F)211 mm (8.3 inches)85%high
November Weather14°C (57°F)38 mm (1.5 inches)84%moderate
December Weather9°C (48°F)52 mm (2.0 inches)82%moderate

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