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September Weather in Kushima, Japan

Last updated: August 23, 2025

In Kushima, Japan, the average temperature in September reaches a pleasant 25°C (78°F). Expect comfortable days with a minimum of 18°C (66°F) and highs peaking at 32°C (89°F). However, be prepared for some rain, as 302 mm (11.9 in) of precipitation can occur over 20 days, contributing to an average humidity of around 80%.

September Temperature in Kushima

In September in Kushima, the average temperature is 25°C (78°F), with maximums reaching 32°C (89°F) and minimums dropping as low as 18°C (66°F). This pleasant climate makes it an ideal month for travelers looking to enjoy outdoor activities and explore the sights.

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

The chart illustrates September temperature patterns in Kushima, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kushima, September typically has an average temperature of 25°C (78°F), with highs reaching up to 32°C (89°F) and lows dropping to around 18°C (66°F).
JanFebMarAprMayJunJulAugSepOctNovDec485057626873808278716152
Data source: Temperature data for Kushima 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 Kushima

In Kushima in September, the total precipitation amount is 302 mm (11.9 in) recorded over a span of 20 days.

September Precipitation Trends in Kushima

The chart displays monthly precipitation patterns in Kushima, 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 Kushima, September typically receives around 302 mm (11.9 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec6011418914424239732923830219610385
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Kushima

In Kushima in September, humidity is 80%. With an average temperature of 25°C (78°F), this humidity feels like a warm blanket enveloping you, making every outdoor activity feel more strenuous and steaming, while also causing you to seek out shade and refreshment more frequently.

September Average Humidity in Kushima

This chart illustrates the average monthly humidity levels in Kushima, 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 Kushima is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%68%72%79%83%86%90%85%80%78%76%75%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Kushima

In Kushima in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Kushima.

Maximum UV Index Levels in Kushima for September

The chart shows the monthly maximum UV Index (UVI) for Kushima 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 Kushima typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5610101212121311864
Data source: Kushima 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 Kushima Compares to Other Months

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

This table compares monthly weather conditions in Kushima, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)60 mm (2.4 inches)72%moderate
February Weather10°C (50°F)114 mm (4.5 inches)68%high
March Weather14°C (57°F)189 mm (7.4 inches)72%very high
April Weather17°C (63°F)144 mm (5.7 inches)79%very high
May Weather20°C (69°F)242 mm (9.5 inches)83%extreme
June Weather23°C (74°F)397 mm (15.6 inches)86%extreme
July Weather27°C (80°F)329 mm (12.9 inches)90%extreme
August Weather28°C (82°F)238 mm (9.4 inches)85%extreme
September Weather25°C (78°F)302 mm (11.9 inches)80%extreme
October Weather21°C (71°F)196 mm (7.7 inches)78%very high
November Weather16°C (62°F)103 mm (4.1 inches)76%high
December Weather11°C (52°F)85 mm (3.4 inches)74%moderate

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