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September Weather in Hayashima, Japan

Last updated: August 23, 2025

In September, the average temperature in Hayashima, Japan is a pleasant 25°C (77°F). You'll experience a minimum of 18°C (65°F) and enjoy the warmth peaking at 33°C (91°F). Be prepared for some rain, as 187 mm (7.3 in) of precipitation is expected over 12 days, accompanied by high humidity at 87%.

September Temperature in Hayashima

In September, in Hayashima, the average temperature is 25°C (77°F). The maximum can reach 33°C (91°F), and the minimum can be as low as 18°C (65°F). This mild climate makes it an ideal destination for outdoor activities and sightseeing.

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

The chart illustrates September temperature patterns in Hayashima, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hayashima, September typically has an average temperature of 25°C (77°F), with highs reaching up to 33°C (91°F) and lows dropping to around 18°C (65°F).
JanFebMarAprMayJunJulAugSepOctNovDec444450576571798277685848
Data source: Temperature data for Hayashima 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 Hayashima

In Hayashima in September, the precipitation amount is 187 mm (7.3 in) over the course of 12 days.

September Precipitation Trends in Hayashima

The chart displays monthly precipitation patterns in Hayashima, 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 Hayashima, September typically receives around 187 mm (7.3 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec41561001261211502791441871933850
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hayashima

In Hayashima 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 Hayashima

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

In Hayashima 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 Hayashima.

Maximum UV Index Levels in Hayashima for September

The chart shows the monthly maximum UV Index (UVI) for Hayashima 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 Hayashima typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec458101111121210754
Data source: Hayashima 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 Hayashima Compares to Other Months

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

This table compares monthly weather conditions in Hayashima, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (44°F)41 mm (1.6 inches)82%moderate
February Weather7°C (44°F)56 mm (2.2 inches)79%moderate
March Weather10°C (50°F)100 mm (3.9 inches)73%very high
April Weather14°C (57°F)126 mm (5.0 inches)74%very high
May Weather18°C (65°F)121 mm (4.8 inches)84%extreme
June Weather22°C (72°F)150 mm (5.9 inches)86%extreme
July Weather26°C (79°F)279 mm (11.0 inches)92%extreme
August Weather28°C (83°F)144 mm (5.7 inches)92%extreme
September Weather25°C (77°F)187 mm (7.3 inches)87%very high
October Weather20°C (68°F)193 mm (7.6 inches)85%high
November Weather14°C (58°F)38 mm (1.5 inches)84%moderate
December Weather9°C (48°F)50 mm (2.0 inches)82%moderate

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