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September Weather in Kashiwazaki, Japan

Last updated: August 23, 2025

In September, the average temperature in Kashiwazaki, Japan hovers around 23°C (73°F). Expect a minimum of 11°C (52°F) and a maximum reaching up to 37°C (99°F). During this month, you'll experience approximately 171 mm (6.7 in) of precipitation over 17 days, making it a notably humid period with an average humidity of 89%.

September Temperature in Kashiwazaki

In September in Kashiwazaki, the average temperature is 23°C (73°F). Maximum temperatures can reach 37°C (99°F), while minimums can drop to as low as 11°C (52°F). This pleasant range makes Kashiwazaki an ideal destination for travelers seeking a comfortable climate.

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

The chart illustrates September temperature patterns in Kashiwazaki, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kashiwazaki, September typically has an average temperature of 23°C (73°F), with highs reaching up to 37°C (99°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec363745536470788173625141
Data source: Temperature data for Kashiwazaki 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 Kashiwazaki

In Kashiwazaki in September, the precipitation amount is 171 mm (6.7 in) over the course of 17 days.

September Precipitation Trends in Kashiwazaki

The chart displays monthly precipitation patterns in Kashiwazaki, 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 Kashiwazaki, September typically receives around 171 mm (6.7 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec194164135127123126326164171188149226
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Kashiwazaki

In Kashiwazaki in September, humidity is 89%. With an average temperature of 23°C (73°F), this humidity feels like a thick, warm blanket wrapping around you, making travel feel sticky and heavy, which can be quite draining for explorers.

September Average Humidity in Kashiwazaki

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

In Kashiwazaki 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 Kashiwazaki.

Maximum UV Index Levels in Kashiwazaki for September

The chart shows the monthly maximum UV Index (UVI) for Kashiwazaki 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 Kashiwazaki typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589101111119653
Data source: Kashiwazaki 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 Kashiwazaki Compares to Other Months

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

This table compares monthly weather conditions in Kashiwazaki, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)194 mm (7.6 inches)88%moderate
February Weather3°C (37°F)164 mm (6.5 inches)86%moderate
March Weather7°C (45°F)135 mm (5.3 inches)81%very high
April Weather12°C (53°F)127 mm (5.0 inches)78%very high
May Weather18°C (64°F)123 mm (4.8 inches)81%very high
June Weather21°C (70°F)126 mm (5.0 inches)88%extreme
July Weather26°C (79°F)326 mm (12.8 inches)92%extreme
August Weather27°C (81°F)164 mm (6.4 inches)92%extreme
September Weather23°C (73°F)171 mm (6.7 inches)89%very high
October Weather17°C (62°F)188 mm (7.4 inches)87%high
November Weather11°C (51°F)149 mm (5.8 inches)85%moderate
December Weather5°C (41°F)226 mm (8.9 inches)86%moderate

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