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September Weather in Nagatoro, Japan

Last updated: August 23, 2025

In September, the average temperature in Nagatoro, Japan hovers around 20°C (69°F). Temperatures can swing between a cool 12°C (53°F) and a warm 33°C (91°F). Expect 285 mm (11.2 in) of precipitation over approximately 24 days, with an average humidity level of 86%, creating a notably humid atmosphere.

September Temperature in Nagatoro

In September in Nagatoro, the average temperature is 20°C (69°F). Maximum temperatures can reach 33°C (91°F), while minimums can drop as low as 12°C (53°F). This range indicates a pleasant climate ideal for exploring and enjoying outdoor activities during your travels.

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

The chart illustrates September temperature patterns in Nagatoro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nagatoro, September typically has an average temperature of 20°C (69°F), with highs reaching up to 33°C (91°F) and lows dropping to around 12°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec363845526266737668594940
Data source: Temperature data for Nagatoro 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 Nagatoro

In Nagatoro in September, the precipitation amount is 285 mm (11.2 in) over the course of 24 days.

September Precipitation Trends in Nagatoro

The chart displays monthly precipitation patterns in Nagatoro, 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 Nagatoro, September typically receives around 285 mm (11.2 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec55591521581862453772422853595957
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Nagatoro

In Nagatoro 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 Nagatoro

This chart illustrates the average monthly humidity levels in Nagatoro, 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 Nagatoro is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%74%70%74%82%88%93%90%86%83%80%78%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Nagatoro

In Nagatoro in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Nagatoro.

Maximum UV Index Levels in Nagatoro for September

The chart shows the monthly maximum UV Index (UVI) for Nagatoro 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 Nagatoro typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111121110754
Data source: Nagatoro 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 Nagatoro Compares to Other Months

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

This table compares monthly weather conditions in Nagatoro, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)55 mm (2.2 inches)76%moderate
February Weather3°C (38°F)59 mm (2.3 inches)74%high
March Weather7°C (45°F)152 mm (6.0 inches)70%very high
April Weather11°C (52°F)158 mm (6.2 inches)74%very high
May Weather16°C (62°F)186 mm (7.3 inches)81%extreme
June Weather19°C (67°F)245 mm (9.7 inches)88%extreme
July Weather23°C (74°F)377 mm (14.8 inches)93%extreme
August Weather25°C (77°F)242 mm (9.5 inches)90%extreme
September Weather20°C (69°F)285 mm (11.2 inches)86%very high
October Weather15°C (59°F)359 mm (14.1 inches)83%high
November Weather10°C (49°F)59 mm (2.3 inches)80%moderate
December Weather5°C (40°F)57 mm (2.2 inches)78%moderate

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