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September Weather in Akkeshi, Japan

Last updated: August 23, 2025

In Akkeshi, Japan, the average temperature in September hovers around 17°C (63°F), creating a pleasant climate for exploration. Expect minimum temperatures to dip to 9°C (49°F) and sunny days reaching up to 25°C (77°F). However, be prepared for some rain, as 106 mm (4.2 in) of precipitation is expected over 9 days, coupled with an average humidity level of 89%.

September Temperature in Akkeshi

In September in Akkeshi, the average temperature is 17°C (63°F). Maximums can reach 25°C (77°F), while minimums can drop to as low as 9°C (49°F). This mild climate makes Akkeshi a perfect destination for travelers looking to enjoy comfortable weather while exploring.

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

The chart illustrates September temperature patterns in Akkeshi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Akkeshi, September typically has an average temperature of 17°C (63°F), with highs reaching up to 25°C (77°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec252433404854616562554432
Data source: Temperature data for Akkeshi 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 Akkeshi

In Akkeshi in September, the total precipitation amount is 106 mm (4.2 in), spread over the course of 9 days.

September Precipitation Trends in Akkeshi

The chart displays monthly precipitation patterns in Akkeshi, 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 Akkeshi, September typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec433987688988961221061647257
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Akkeshi

In Akkeshi in September humidity is 89%. With an average temperature of 17°C (63°F), this humidity feels like a thick blanket wrapping around you, making outdoor activities feel more strenuous and less enjoyable for traveling.

September Average Humidity in Akkeshi

This chart illustrates the average monthly humidity levels in Akkeshi, 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 Akkeshi is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%83%86%88%93%96%89%83%80%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Akkeshi

In Akkeshi in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Akkeshi.

Maximum UV Index Levels in Akkeshi for September

The chart shows the monthly maximum UV Index (UVI) for Akkeshi 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 Akkeshi typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2357891098532
Data source: Akkeshi 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 Akkeshi Compares to Other Months

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

This table compares monthly weather conditions in Akkeshi, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)43 mm (1.7 inches)84%low
February Weather-4°C (25°F)38 mm (1.5 inches)83%moderate
March Weather0°C (33°F)87 mm (3.4 inches)83%moderate
April Weather4°C (40°F)68 mm (2.7 inches)83%high
May Weather9°C (48°F)89 mm (3.5 inches)86%very high
June Weather12°C (54°F)88 mm (3.4 inches)88%very high
July Weather16°C (61°F)96 mm (3.8 inches)93%very high
August Weather18°C (65°F)122 mm (4.8 inches)96%very high
September Weather17°C (63°F)106 mm (4.2 inches)89%very high
October Weather13°C (55°F)164 mm (6.5 inches)83%moderate
November Weather7°C (45°F)72 mm (2.8 inches)80%moderate
December Weather0°C (32°F)57 mm (2.2 inches)79%low

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