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September Weather in Kasagi, Japan

Last updated: August 23, 2025

In September, the average temperature in Kasagi, Japan hovers around 24°C (75°F). Expect a minimum of 12°C (53°F) and a maximum of 36°C (97°F), providing a warm climate overall. Be prepared for 150 mm (5.9 in) of precipitation spread over 15 days, contributing to a high average humidity of 87%.

September Temperature in Kasagi

In September in Kasagi, the average temperature is 24°C (75°F). Maximums can reach 36°C (97°F), and minimums can be as low as 12°C (53°F). This makes Kasagi an ideal destination for travelers looking to enjoy warm weather while still having the option for cooler excursions.

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

The chart illustrates September temperature patterns in Kasagi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kasagi, September typically has an average temperature of 24°C (75°F), with highs reaching up to 36°C (97°F) and lows dropping to around 12°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec394148576672808275645344
Data source: Temperature data for Kasagi 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 Kasagi

In Kasagi in September, the total precipitation amount is 150 mm (5.9 in) over a span of 15 days.

September Precipitation Trends in Kasagi

The chart displays monthly precipitation patterns in Kasagi, 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 Kasagi, September typically receives around 150 mm (5.9 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec54651241291481562631561502484061
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Kasagi

In Kasagi in September, humidity is 87%. With an average temperature of 24°C (75°F), this humidity feels like a warm, sticky embrace that clings to your skin, making outdoor activities feel heavier and more exhausting, and the air thickens, leaving you longing for shade and refreshing breezes as you navigate your adventures.

September Average Humidity in Kasagi

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

In Kasagi 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 Kasagi.

Maximum UV Index Levels in Kasagi for September

The chart shows the monthly maximum UV Index (UVI) for Kasagi 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 Kasagi typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468111111121110753
Data source: Kasagi 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 Kasagi Compares to Other Months

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

This table compares monthly weather conditions in Kasagi, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)54 mm (2.1 inches)82%moderate
February Weather5°C (41°F)65 mm (2.5 inches)79%high
March Weather9°C (49°F)124 mm (4.9 inches)74%very high
April Weather14°C (57°F)129 mm (5.1 inches)76%extreme
May Weather19°C (66°F)148 mm (5.8 inches)83%extreme
June Weather22°C (73°F)156 mm (6.1 inches)87%extreme
July Weather26°C (80°F)263 mm (10.3 inches)93%extreme
August Weather28°C (83°F)156 mm (6.1 inches)91%extreme
September Weather24°C (75°F)150 mm (5.9 inches)87%very high
October Weather18°C (65°F)248 mm (9.7 inches)85%high
November Weather12°C (53°F)40 mm (1.6 inches)83%moderate
December Weather6°C (44°F)61 mm (2.4 inches)83%moderate

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