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September Weather in Otsuchi, Japan

Last updated: August 23, 2025

In September, the average temperature in Otsuchi, Japan hovers around 20°C (69°F), providing a pleasant climate for visitors. Expect minimum temperatures to dip to 14°C (57°F), while highs can reach a warm 27°C (80°F). However, prepare for some rain, as the area experiences about 185 mm (7.3 in) of precipitation over 13 days. With an average humidity level of 86%, it’s advisable to stay hydrated and enjoy the lush surroundings!

September Temperature in Otsuchi

In September in Otsuchi, the average temperature is 20°C (69°F). Maximums can reach 27°C (80°F), while minimums can drop to as low as 14°C (57°F). This pleasant weather makes it a great time for travelers to explore and enjoy outdoor activities in Otsuchi.

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

The chart illustrates September temperature patterns in Otsuchi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Otsuchi, September typically has an average temperature of 20°C (69°F), with highs reaching up to 27°C (80°F) and lows dropping to around 14°C (57°F).
JanFebMarAprMayJunJulAugSepOctNovDec373641475461687269615241
Data source: Temperature data for Otsuchi 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 Otsuchi

In Otsuchi in September, the precipitation amount is 185 mm (7.3 in) spread over 13 days.

September Precipitation Trends in Otsuchi

The chart displays monthly precipitation patterns in Otsuchi, 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 Otsuchi, September typically receives around 185 mm (7.3 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec51591151271161211762001852435771
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Otsuchi

In Otsuchi in September, humidity is 86%. With an average temperature of 20°C (69°F), this humidity feels like a warm, dense blanket wrapping around you, making travel feel sluggish and sticky, as each step can leave you yearning for a cool breeze or a refreshing drink.

September Average Humidity in Otsuchi

This chart illustrates the average monthly humidity levels in Otsuchi, 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 Otsuchi is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%77%75%80%87%92%92%86%82%79%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Otsuchi

In Otsuchi in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Otsuchi.

Maximum UV Index Levels in Otsuchi for September

The chart shows the monthly maximum UV Index (UVI) for Otsuchi 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 Otsuchi typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346891110109643
Data source: Otsuchi 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 Otsuchi Compares to Other Months

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

This table compares monthly weather conditions in Otsuchi, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)51 mm (2.0 inches)80%moderate
February Weather2°C (37°F)59 mm (2.3 inches)79%moderate
March Weather5°C (42°F)115 mm (4.5 inches)77%high
April Weather8°C (47°F)127 mm (5.0 inches)75%very high
May Weather12°C (55°F)116 mm (4.6 inches)80%very high
June Weather16°C (61°F)120 mm (4.7 inches)87%extreme
July Weather20°C (69°F)175 mm (6.9 inches)92%very high
August Weather22°C (72°F)200 mm (7.9 inches)92%very high
September Weather20°C (69°F)185 mm (7.3 inches)86%very high
October Weather16°C (61°F)243 mm (9.6 inches)82%high
November Weather11°C (52°F)57 mm (2.3 inches)79%moderate
December Weather5°C (42°F)71 mm (2.8 inches)80%moderate

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