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September Weather in Shinjo, Japan

Last updated: August 23, 2025

In Shinjo, Japan, the average temperature in September hovers around 21°C (71°F), offering a pleasant climate. However, temperatures can swing from a cool 11°C (51°F) to a warm 32°C (90°F). Expect approximately 254 mm (10.0 in) of precipitation spread over 17 days, contributing to a delightful average humidity of 87%. Perfect for those who love a lush, vibrant atmosphere!

September Temperature in Shinjo

In September in Shinjo, the average temperature is 21°C (71°F). Maximum can reach 32°C (90°F) and minimum can be as low as 11°C (51°F). This pleasant climate makes Shinjo a great destination for travelers seeking warm and comfortable weather.

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

The chart illustrates September temperature patterns in Shinjo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shinjo, September typically has an average temperature of 21°C (71°F), with highs reaching up to 32°C (90°F) and lows dropping to around 11°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec363745536369767971615040
Data source: Temperature data for Shinjo 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 Shinjo

In Shinjo in September, the total precipitation amount is 254 mm (10.0 in) during 17 days, indicating a relatively wet period for the region.

September Precipitation Trends in Shinjo

The chart displays monthly precipitation patterns in Shinjo, 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 Shinjo, September typically receives around 254 mm (10.0 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec849314413711721635028725420056109
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Shinjo

In Shinjo in September humidity is 87%. With an average temperature of 21°C (71°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities seem more strenuous and necessitating frequent breaks in the shade for comfort.

September Average Humidity in Shinjo

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

In Shinjo 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 Shinjo.

Maximum UV Index Levels in Shinjo for September

The chart shows the monthly maximum UV Index (UVI) for Shinjo 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 Shinjo typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111121210753
Data source: Shinjo 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 Shinjo Compares to Other Months

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

This table compares monthly weather conditions in Shinjo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)84 mm (3.3 inches)82%moderate
February Weather3°C (37°F)93 mm (3.7 inches)79%high
March Weather7°C (45°F)144 mm (5.7 inches)73%very high
April Weather12°C (53°F)137 mm (5.4 inches)74%very high
May Weather17°C (63°F)117 mm (4.6 inches)84%extreme
June Weather20°C (69°F)216 mm (8.5 inches)86%extreme
July Weather25°C (77°F)350 mm (13.8 inches)92%extreme
August Weather26°C (79°F)287 mm (11.3 inches)92%extreme
September Weather21°C (71°F)254 mm (10.0 inches)87%very high
October Weather16°C (61°F)200 mm (7.9 inches)85%high
November Weather10°C (50°F)56 mm (2.2 inches)84%moderate
December Weather5°C (40°F)109 mm (4.3 inches)82%moderate

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