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September Weather in Oketo, Japan

Last updated: August 23, 2025

In Oketo, Japan, the average temperature for September hovers around 15°C (59°F), with a minimum of 1°C (34°F) and a peak of 28°C (83°F). Enjoy the lush ambiance with an average humidity of 89%. However, be prepared for some rain, as 101 mm (4.0 in) of precipitation usually falls over the course of 13 days.

September Temperature in Oketo

In September in Oketo, the average temperature is 15°C (59°F), with a maximum that can reach 28°C (83°F) and a minimum that can dip as low as 1°C (34°F). Be prepared for a wide range of temperatures when planning your travel to Oketo this September.

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

The chart illustrates September temperature patterns in Oketo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oketo, September typically has an average temperature of 15°C (59°F), with highs reaching up to 28°C (83°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec161828395157666559483523
Data source: Temperature data for Oketo 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 Oketo

In Oketo in September, the precipitation amount is 101 mm (4.0 in) over the course of 13 days.

September Precipitation Trends in Oketo

The chart displays monthly precipitation patterns in Oketo, 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 Oketo, September typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec59628875991231221671011238960
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Oketo

In Oketo in September humidity is 89%. With an average temperature of 15°C (59°F), this humidity feels like a damp blanket enveloping you, making even short walks feel heavy and sluggish, while creating a sense of heaviness in the air that can dampen the joy of exploring.

September Average Humidity in Oketo

This chart illustrates the average monthly humidity levels in Oketo, 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 Oketo is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%83%86%88%93%96%89%83%80%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Oketo

In Oketo 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 Oketo.

Maximum UV Index Levels in Oketo for September

The chart shows the monthly maximum UV Index (UVI) for Oketo 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 Oketo typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2368891098532
Data source: Oketo 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 Oketo Compares to Other Months

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

This table compares monthly weather conditions in Oketo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (16°F)59 mm (2.3 inches)84%low
February Weather-8°C (18°F)62 mm (2.4 inches)83%moderate
March Weather-2°C (29°F)88 mm (3.5 inches)83%high
April Weather4°C (39°F)75 mm (3.0 inches)83%very high
May Weather11°C (52°F)99 mm (3.9 inches)86%very high
June Weather14°C (57°F)123 mm (4.8 inches)88%very high
July Weather19°C (66°F)122 mm (4.8 inches)93%very high
August Weather18°C (65°F)167 mm (6.6 inches)96%very high
September Weather15°C (59°F)101 mm (4.0 inches)89%very high
October Weather9°C (48°F)123 mm (4.9 inches)83%moderate
November Weather2°C (36°F)89 mm (3.5 inches)80%moderate
December Weather-5°C (23°F)60 mm (2.3 inches)79%low

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