nomadseason

September Weather in Omu, Japan

Last updated: August 23, 2025

In September, the average temperature in Omu, Japan hovers around 17°C (62°F). Expect a low of 7°C (45°F) and a high of 28°C (82°F), making it a month of pleasant variability. However, don't forget your umbrella; with 80 mm (3.1 in) of precipitation over 11 days, you might encounter some rainy spells. The average humidity reaches a balmy 88%, contributing to the overall moist atmosphere.

September Temperature in Omu

In September in Omu, the average temperature is 17°C (62°F). The maximum can reach 28°C (82°F) and the minimum can be as low as 7°C (45°F). This makes it a great time for travelers to enjoy mild weather while exploring the area.

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

The chart illustrates September temperature patterns in Omu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Omu, September typically has an average temperature of 17°C (62°F), with highs reaching up to 28°C (82°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec202030405056656662513927
Data source: Temperature data for Omu generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Omu

In Omu in September, the precipitation amount is 80 mm (3.1 in) spread over a duration of 11 days.

September Precipitation Trends in Omu

The chart displays monthly precipitation patterns in Omu, 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 Omu, September typically receives around 80 mm (3.1 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec636373608788821578013410269
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Omu

In Omu in September, humidity is 88%. With an average temperature of 17°C (62°F), this humidity feels like traveling through a dense fog, making the air feel heavy and sticky, which can be quite uncomfortable for outdoor activities.

September Average Humidity in Omu

This chart illustrates the average monthly humidity levels in Omu, 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 Omu is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%85%85%88%88%93%95%88%81%78%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Omu

In Omu in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Omu.

Maximum UV Index Levels in Omu for September

The chart shows the monthly maximum UV Index (UVI) for Omu 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 Omu typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec236789997532
Data source: Omu 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 Omu Compares to Other Months

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

This table compares monthly weather conditions in Omu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)63 mm (2.5 inches)87%low
February Weather-6°C (21°F)63 mm (2.5 inches)86%moderate
March Weather-1°C (30°F)73 mm (2.9 inches)85%high
April Weather4°C (40°F)60 mm (2.3 inches)85%high
May Weather10°C (51°F)87 mm (3.4 inches)88%very high
June Weather13°C (56°F)88 mm (3.5 inches)88%very high
July Weather18°C (65°F)82 mm (3.2 inches)93%very high
August Weather19°C (66°F)157 mm (6.2 inches)95%very high
September Weather17°C (62°F)80 mm (3.1 inches)88%high
October Weather11°C (51°F)134 mm (5.3 inches)80%moderate
November Weather4°C (39°F)102 mm (4.0 inches)78%moderate
December Weather-3°C (27°F)69 mm (2.7 inches)82%low

Compare Omu's Climate with Cities Worldwide