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September Weather in Onagawa Cho, Japan

Last updated: August 23, 2025

In Onagawa Cho, Japan, the average temperature in September hovers around 22°C (71°F). Expect minimums of 15°C (59°F) and maximums reaching 28°C (82°F). The month also brings about 141 mm (5.5 in) of precipitation, spread over 12 days. With an average humidity of 86%, be prepared for a moist atmosphere as you enjoy your stay!

September Temperature in Onagawa Cho

In September in Onagawa Cho, the average temperature is 22°C (71°F). Maximums can reach 28°C (82°F), while minimums can dip to as low as 15°C (59°F). This pleasant climate makes it an ideal destination for travelers seeking mild weather and outdoor activities.

September Weather in Onagawa Cho: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Onagawa Cho, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Onagawa Cho, September typically has an average temperature of 22°C (71°F), with highs reaching up to 28°C (82°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec383843495763707571635343
Data source: Temperature data for Onagawa Cho 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 Onagawa Cho

In Onagawa Cho in September, the precipitation amount is 141 mm (5.5 in), occurring over the course of 12 days.

September Precipitation Trends in Onagawa Cho

The chart displays monthly precipitation patterns in Onagawa Cho, 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 Onagawa Cho, September typically receives around 141 mm (5.5 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec4742107114110961731681412144463
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Onagawa Cho

In Onagawa Cho in September humidity is 86%. With an average temperature of 22°C (71°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel muggy and draining.

September Average Humidity in Onagawa Cho

This chart illustrates the average monthly humidity levels in Onagawa Cho, 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 Onagawa Cho 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 Onagawa Cho

In Onagawa Cho 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 Onagawa Cho.

Maximum UV Index Levels in Onagawa Cho for September

The chart shows the monthly maximum UV Index (UVI) for Onagawa Cho 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 Onagawa Cho typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468101010119643
Data source: Onagawa Cho 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 Onagawa Cho Compares to Other Months

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

This table compares monthly weather conditions in Onagawa Cho, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (39°F)47 mm (1.8 inches)80%moderate
February Weather4°C (39°F)42 mm (1.6 inches)79%moderate
March Weather6°C (44°F)107 mm (4.2 inches)77%high
April Weather9°C (49°F)114 mm (4.5 inches)75%very high
May Weather14°C (57°F)110 mm (4.3 inches)80%very high
June Weather17°C (63°F)96 mm (3.8 inches)87%very high
July Weather21°C (71°F)173 mm (6.8 inches)92%very high
August Weather24°C (75°F)167 mm (6.6 inches)92%extreme
September Weather22°C (71°F)141 mm (5.5 inches)86%very high
October Weather17°C (63°F)214 mm (8.4 inches)82%high
November Weather12°C (53°F)44 mm (1.7 inches)79%moderate
December Weather6°C (43°F)63 mm (2.5 inches)80%moderate

Compare Onagawa Cho's Climate with Cities Worldwide