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September Weather in Hanawa, Japan

Last updated: August 23, 2025

In September, the average temperature in Hanawa, Japan is a pleasant 18°C (65°F). However, temperatures can vary significantly, with a minimum of 5°C (40°F) and a maximum of 32°C (90°F). Additionally, you can expect 141 mm (5.5 in) of precipitation spread over 15 days, contributing to an average humidity of 89%.

September Temperature in Hanawa

In September in Hanawa, the average temperature is 18°C (65°F). Maximums can reach 32°C (90°F), while minimums can drop as low as 5°C (40°F). This makes it an ideal time for travelers to pack layers and enjoy a range of outdoor activities.

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

The chart illustrates September temperature patterns in Hanawa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hanawa, September typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (90°F) and lows dropping to around 5°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec252735455663717265534230
Data source: Temperature data for Hanawa 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 Hanawa

In Hanawa in September, the total precipitation amount is 141 mm (5.5 in) over the course of 15 days.

September Precipitation Trends in Hanawa

The chart displays monthly precipitation patterns in Hanawa, 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 Hanawa, September typically receives around 141 mm (5.5 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec85116113138117139170175141167109125
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Hanawa

In Hanawa in September, humidity is 89%. With an average temperature of 18°C (65°F), this humidity feels like wrapping yourself in a damp blanket while traveling, making it sticky and uncomfortable for outdoor activities.

September Average Humidity in Hanawa

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

In Hanawa in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Hanawa.

Maximum UV Index Levels in Hanawa for September

The chart shows the monthly maximum UV Index (UVI) for Hanawa 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 Hanawa typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346891010119642
Data source: Hanawa 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 Hanawa Compares to Other Months

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

This table compares monthly weather conditions in Hanawa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)85 mm (3.4 inches)79%moderate
February Weather-3°C (27°F)116 mm (4.6 inches)78%moderate
March Weather2°C (35°F)113 mm (4.5 inches)77%high
April Weather7°C (45°F)138 mm (5.4 inches)78%very high
May Weather13°C (56°F)117 mm (4.6 inches)86%very high
June Weather17°C (63°F)139 mm (5.5 inches)91%very high
July Weather22°C (71°F)170 mm (6.7 inches)95%very high
August Weather22°C (73°F)175 mm (6.9 inches)97%extreme
September Weather18°C (65°F)141 mm (5.5 inches)89%very high
October Weather12°C (54°F)167 mm (6.6 inches)81%high
November Weather6°C (42°F)109 mm (4.3 inches)78%moderate
December Weather-1°C (30°F)124 mm (4.9 inches)77%low

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