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September Weather in Izumisano, Japan

Last updated: August 23, 2025

In September, the average temperature in Izumisano, Japan is a warm 25°C (78°F). Expect a minimum of 14°C (58°F) and a peak of 37°C (98°F). During this time, you can anticipate about 182 mm (7.2 in) of precipitation spread over 14 days, with an average humidity level of 87%.

September Temperature in Izumisano

In September in Izumisano, the average temperature is 25°C (78°F). The maximum can reach 37°C (98°F), and the minimum can be as low as 14°C (58°F). It's an ideal time to enjoy outdoor activities and explore the vibrant local culture while staying prepared for varying weather conditions.

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

The chart illustrates September temperature patterns in Izumisano, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Izumisano, September typically has an average temperature of 25°C (78°F), with highs reaching up to 37°C (98°F) and lows dropping to around 14°C (58°F).
JanFebMarAprMayJunJulAugSepOctNovDec434451596874818578685748
Data source: Temperature data for Izumisano 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 Izumisano

In Izumisano in September, the precipitation amount is 182 mm (7.2 in) over a span of 14 days.

September Precipitation Trends in Izumisano

The chart displays monthly precipitation patterns in Izumisano, 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 Izumisano, September typically receives around 182 mm (7.2 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec49601031191421622861701822364961
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Izumisano

In Izumisano in September, humidity is 87%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities particularly strenuous and requiring frequent breaks for hydration and shade.

September Average Humidity in Izumisano

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

In Izumisano 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 Izumisano.

Maximum UV Index Levels in Izumisano for September

The chart shows the monthly maximum UV Index (UVI) for Izumisano 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 Izumisano typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec458111111111110754
Data source: Izumisano 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 Izumisano Compares to Other Months

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

This table compares monthly weather conditions in Izumisano, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (44°F)49 mm (1.9 inches)82%moderate
February Weather7°C (44°F)60 mm (2.4 inches)79%moderate
March Weather11°C (52°F)103 mm (4.0 inches)74%very high
April Weather15°C (60°F)119 mm (4.7 inches)76%extreme
May Weather20°C (68°F)142 mm (5.6 inches)83%extreme
June Weather23°C (74°F)162 mm (6.4 inches)87%extreme
July Weather27°C (82°F)286 mm (11.3 inches)93%extreme
August Weather29°C (85°F)170 mm (6.7 inches)91%extreme
September Weather25°C (78°F)182 mm (7.2 inches)87%very high
October Weather20°C (68°F)236 mm (9.3 inches)85%high
November Weather14°C (57°F)49 mm (1.9 inches)83%moderate
December Weather9°C (48°F)61 mm (2.4 inches)83%moderate

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