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September Weather in Itayanagi, Japan

Last updated: August 23, 2025

The average temperature in Itayanagi, Japan during September is a comfortable 20°C (68°F). However, you can experience a minimum of 7°C (45°F) and a scorching maximum of 34°C (94°F). Be prepared for some rain, as the area sees about 129 mm (5.1 in) of precipitation over 13 days. Don't forget the humidity, which averages around a high 89%—perfect for staying hydrated!

September Temperature in Itayanagi

In September in Itayanagi, the average temperature is 20°C (68°F). Maximums can reach 34°C (94°F) and minimums can be as low as 7°C (45°F). This makes Itayanagi an ideal destination for travelers seeking a pleasant climate with a mix of warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Itayanagi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Itayanagi, September typically has an average temperature of 20°C (68°F), with highs reaching up to 34°C (94°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec303037465865737567564533
Data source: Temperature data for Itayanagi 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 Itayanagi

In Itayanagi in September, the precipitation amount is 129 mm (5.1 in) over the course of 13 days.

September Precipitation Trends in Itayanagi

The chart displays monthly precipitation patterns in Itayanagi, 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 Itayanagi, September typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec80106103113104130135181129166106130
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Itayanagi

In Itayanagi in September, humidity is 89%. With an average temperature of 20°C (68°F), this humidity feels like walking through a warm, damp blanket that clings to your skin, making each step feel heavier and the air thick with moisture, which can be quite uncomfortable for traveling.

September Average Humidity in Itayanagi

This chart illustrates the average monthly humidity levels in Itayanagi, 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 Itayanagi is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%78%77%78%86%91%95%97%89%82%78%77%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Itayanagi

In Itayanagi in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Itayanagi.

Maximum UV Index Levels in Itayanagi for September

The chart shows the monthly maximum UV Index (UVI) for Itayanagi 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 Itayanagi typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346891010118642
Data source: Itayanagi 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 Itayanagi Compares to Other Months

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

This table compares monthly weather conditions in Itayanagi, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)79 mm (3.1 inches)79%moderate
February Weather-1°C (31°F)106 mm (4.2 inches)78%moderate
March Weather3°C (38°F)103 mm (4.1 inches)77%high
April Weather8°C (47°F)113 mm (4.4 inches)78%very high
May Weather14°C (58°F)104 mm (4.1 inches)86%very high
June Weather18°C (65°F)130 mm (5.1 inches)91%very high
July Weather23°C (73°F)135 mm (5.3 inches)95%very high
August Weather24°C (75°F)181 mm (7.1 inches)97%extreme
September Weather20°C (68°F)129 mm (5.1 inches)89%very high
October Weather13°C (56°F)166 mm (6.6 inches)81%high
November Weather7°C (45°F)106 mm (4.2 inches)78%moderate
December Weather1°C (33°F)130 mm (5.1 inches)77%low

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