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September Weather in Nanjo, Japan

Last updated: August 23, 2025

In September, the average temperature in Nanjo, Japan sits at a warm 28°C (82°F), making it an inviting destination. Expect temperatures to range from a minimum of 24°C (75°F) to a maximum of 30°C (87°F). However, prepare for occasional showers, as the area experiences an average precipitation of 253 mm (10.0 in) over 19 days. With an average humidity of 82%, you'll feel the tropical vibe all around!

September Temperature in Nanjo

In September in Nanjo, the average temperature is 28°C (82°F). Maximums can reach 30°C (87°F), while minimums can drop to as low as 24°C (75°F). This pleasant climate makes it an ideal destination for travelers seeking warm and enjoyable weather.

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

The chart illustrates September temperature patterns in Nanjo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nanjo, September typically has an average temperature of 28°C (82°F), with highs reaching up to 30°C (87°F) and lows dropping to around 24°C (75°F).
JanFebMarAprMayJunJulAugSepOctNovDec656568707580828382797468
Data source: Temperature data for Nanjo 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 Nanjo

In Nanjo in September, the total precipitation amount reaches 253 mm (10.0 in) over a period of 19 days.

September Precipitation Trends in Nanjo

The chart displays monthly precipitation patterns in Nanjo, 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 Nanjo, September typically receives around 253 mm (10.0 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec9197107137208302192206253160104188
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Nanjo

In Nanjo in September humidity is 82%. With an average temperature of 28°C (82°F), this humidity feels like walking through a warm, dense blanket, making outdoor activities a challenge and necessitating frequent breaks to stay hydrated.

September Average Humidity in Nanjo

This chart illustrates the average monthly humidity levels in Nanjo, 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 Nanjo is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec71%71%76%82%84%86%86%82%82%81%79%75%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Nanjo

In Nanjo in September, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Nanjo.

Maximum UV Index Levels in Nanjo for September

The chart shows the monthly maximum UV Index (UVI) for Nanjo 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 Nanjo typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec7911121313131312996
Data source: Nanjo 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 Nanjo Compares to Other Months

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

This table compares monthly weather conditions in Nanjo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather19°C (66°F)91 mm (3.6 inches)71%high
February Weather19°C (66°F)97 mm (3.8 inches)71%very high
March Weather20°C (68°F)107 mm (4.2 inches)76%extreme
April Weather21°C (71°F)137 mm (5.4 inches)82%extreme
May Weather24°C (76°F)208 mm (8.2 inches)84%extreme
June Weather26°C (80°F)302 mm (11.9 inches)86%extreme
July Weather28°C (83°F)192 mm (7.6 inches)86%extreme
August Weather28°C (83°F)205 mm (8.1 inches)82%extreme
September Weather28°C (82°F)253 mm (10.0 inches)82%extreme
October Weather26°C (79°F)160 mm (6.3 inches)80%very high
November Weather23°C (74°F)103 mm (4.1 inches)79%very high
December Weather20°C (69°F)188 mm (7.4 inches)75%high

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