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September Weather in Ryotsu-minato, Japan

Last updated: August 23, 2025

In September, the average temperature in Ryotsu-minato, Japan hovers around 23°C (74°F), with a minimum dipping to 16°C (61°F) and a maximum soaring to 36°C (96°F). Expect a precipitation amount of 160 mm (6.3 in) over 15 days, contributing to a notably high average humidity of 89%. Stay prepared for a mix of warmth and dampness this time of year!

September Temperature in Ryotsu-minato

In September in Ryotsu-minato, the average temperature is 23°C (74°F), with maximums reaching 36°C (96°F) and minimums dropping as low as 16°C (61°F). This mild climate makes Ryotsu-minato a perfect destination for travelers seeking both warmth and comfort.

September Weather in Ryotsu-minato: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Ryotsu-minato, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ryotsu-minato, September typically has an average temperature of 23°C (74°F), with highs reaching up to 36°C (96°F) and lows dropping to around 16°C (61°F).
JanFebMarAprMayJunJulAugSepOctNovDec394045526268778174645444
Data source: Temperature data for Ryotsu-minato 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 Ryotsu-minato

In Ryotsu-minato in September, the precipitation amount is 160 mm (6.3 in) over the course of 15 days.

September Precipitation Trends in Ryotsu-minato

The chart displays monthly precipitation patterns in Ryotsu-minato, 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 Ryotsu-minato, September typically receives around 160 mm (6.3 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec1341061031129493258215160157124187
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ryotsu-minato

In Ryotsu-minato in September humidity is 89%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket enveloping you, making traveling feel stifling and exhausting as you navigate the thick air.

September Average Humidity in Ryotsu-minato

This chart illustrates the average monthly humidity levels in Ryotsu-minato, 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 Ryotsu-minato is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%81%79%81%88%92%92%89%87%85%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ryotsu-minato

In Ryotsu-minato 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 Ryotsu-minato.

Maximum UV Index Levels in Ryotsu-minato for September

The chart shows the monthly maximum UV Index (UVI) for Ryotsu-minato 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 Ryotsu-minato typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3478101011119643
Data source: Ryotsu-minato 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 Ryotsu-minato Compares to Other Months

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

This table compares monthly weather conditions in Ryotsu-minato, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)134 mm (5.3 inches)88%moderate
February Weather4°C (40°F)106 mm (4.2 inches)86%moderate
March Weather7°C (46°F)103 mm (4.0 inches)81%high
April Weather11°C (52°F)112 mm (4.4 inches)78%very high
May Weather16°C (62°F)94 mm (3.7 inches)81%very high
June Weather20°C (69°F)93 mm (3.6 inches)88%very high
July Weather25°C (77°F)258 mm (10.2 inches)92%extreme
August Weather27°C (81°F)215 mm (8.4 inches)92%extreme
September Weather23°C (74°F)160 mm (6.3 inches)89%very high
October Weather18°C (65°F)157 mm (6.2 inches)87%high
November Weather12°C (54°F)124 mm (4.9 inches)85%moderate
December Weather7°C (44°F)187 mm (7.3 inches)86%moderate

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