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September Weather in Hiranai, Japan

Last updated: August 23, 2025

In September, the average temperature in Hiranai, Japan hovers around 20°C (69°F), with a comfortable minimum of 12°C (54°F) and a warm maximum of 30°C (86°F). However, be prepared for some moisture, as you'll likely see about 110 mm (4.3 in) of precipitation over 12 days. With an average humidity level of 89%, the atmosphere can feel quite humid, so it’s wise to pack accordingly!

September Temperature in Hiranai

In September in Hiranai, the average temperature is 20°C (69°F). The maximum can reach 30°C (86°F), and the minimum can be as low as 12°C (54°F). This mild climate makes it a perfect time for travelers to explore the area's natural beauty and enjoy outdoor activities.

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

The chart illustrates September temperature patterns in Hiranai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hiranai, September typically has an average temperature of 20°C (69°F), with highs reaching up to 30°C (86°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec323239475663717369594836
Data source: Temperature data for Hiranai 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 Hiranai

In Hiranai in September, the precipitation amount is 110 mm (4.3 in) over a span of 12 days.

September Precipitation Trends in Hiranai

The chart displays monthly precipitation patterns in Hiranai, 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 Hiranai, September typically receives around 110 mm (4.3 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec8510089969611612418611015892141
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hiranai

In Hiranai in September humidity is 89%. With an average temperature of 20°C (69°F), this humidity feels like a warm blanket enveloping you, making outdoor activities uncomfortable and requiring frequent breaks for hydration and rest.

September Average Humidity in Hiranai

This chart illustrates the average monthly humidity levels in Hiranai, 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 Hiranai is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%78%77%78%86%91%95%97%89%82%78%77%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hiranai

In Hiranai 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 Hiranai.

Maximum UV Index Levels in Hiranai for September

The chart shows the monthly maximum UV Index (UVI) for Hiranai 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 Hiranai typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235891010118642
Data source: Hiranai 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 Hiranai Compares to Other Months

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

This table compares monthly weather conditions in Hiranai, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)85 mm (3.4 inches)79%low
February Weather0°C (32°F)100 mm (3.9 inches)78%moderate
March Weather4°C (39°F)89 mm (3.5 inches)77%moderate
April Weather8°C (47°F)96 mm (3.8 inches)78%very high
May Weather13°C (56°F)96 mm (3.8 inches)86%very high
June Weather17°C (63°F)116 mm (4.6 inches)91%very high
July Weather21°C (71°F)124 mm (4.9 inches)95%very high
August Weather23°C (74°F)186 mm (7.3 inches)97%extreme
September Weather20°C (69°F)110 mm (4.3 inches)89%very high
October Weather15°C (59°F)158 mm (6.2 inches)81%high
November Weather9°C (48°F)92 mm (3.6 inches)78%moderate
December Weather2°C (37°F)141 mm (5.6 inches)77%low

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