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September Weather in Nantan, Japan

Last updated: August 23, 2025

In September, the average temperature in Nantan, Japan is a pleasant 23°C (74°F), with lows dipping to 12°C (53°F) and highs reaching up to 34°C (94°F). Expect around 193 mm (7.6 in) of precipitation spread over 15 days, contributing to a notably high average humidity of 87%. Be prepared for a mix of warm days and potential rain!

September Temperature in Nantan

In September in Nantan, the weather is generally pleasant, making it an ideal time for travelers to explore and enjoy outdoor activities.

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

The chart illustrates September temperature patterns in Nantan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nantan, September typically has an average temperature of 23°C (74°F), with highs reaching up to 34°C (94°F) and lows dropping to around 12°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec394048566571798274645343
Data source: Temperature data for Nantan 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 Nantan

In Nantan in September, the precipitation amount is 193 mm (7.6 in) over the course of 15 days.

September Precipitation Trends in Nantan

The chart displays monthly precipitation patterns in Nantan, 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 Nantan, September typically receives around 193 mm (7.6 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec52621201551521583412391932434764
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Nantan

In Nantan in September, humidity is 87%. With an average temperature of 23°C (74°F), this humidity feels like a warm, sticky embrace that can quickly wear you down while traveling, making even short walks feel exhausting and necessitating frequent breaks for hydration and cool air.

September Average Humidity in Nantan

This chart illustrates the average monthly humidity levels in Nantan, 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 Nantan is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%74%76%83%87%93%91%87%85%83%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Nantan

In Nantan 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 Nantan.

Maximum UV Index Levels in Nantan for September

The chart shows the monthly maximum UV Index (UVI) for Nantan 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 Nantan typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110753
Data source: Nantan 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 Nantan Compares to Other Months

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

This table compares monthly weather conditions in Nantan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)52 mm (2.1 inches)82%moderate
February Weather4°C (40°F)62 mm (2.4 inches)79%high
March Weather9°C (48°F)120 mm (4.7 inches)74%very high
April Weather13°C (56°F)155 mm (6.1 inches)76%very high
May Weather18°C (65°F)151 mm (6.0 inches)83%extreme
June Weather22°C (71°F)158 mm (6.2 inches)87%extreme
July Weather26°C (79°F)341 mm (13.4 inches)93%extreme
August Weather28°C (82°F)238 mm (9.4 inches)91%extreme
September Weather23°C (74°F)193 mm (7.6 inches)87%very high
October Weather18°C (64°F)243 mm (9.6 inches)85%high
November Weather12°C (53°F)46 mm (1.8 inches)83%moderate
December Weather6°C (43°F)64 mm (2.5 inches)83%moderate

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