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September Weather in Toyokoro, Japan

Last updated: August 23, 2025

In September, the average temperature in Toyokoro, Japan hovers around 17°C (63°F), with minimums dipping to 5°C (41°F) and peaks reaching up to 31°C (88°F). Expect a precipitation total of 117 mm (4.6 in) spread over approximately 11 days, accompanied by a high average humidity of 89%.

September Temperature in Toyokoro

In September in Toyokoro, the average temperature is 17°C (63°F). Maximum temperatures can reach up to 31°C (88°F), while the minimum can drop as low as 5°C (41°F). This variety in weather makes it advisable for travelers to pack layers to accommodate both warm days and cooler nights.

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

The chart illustrates September temperature patterns in Toyokoro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Toyokoro, September typically has an average temperature of 17°C (63°F), with highs reaching up to 31°C (88°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec212234435358656763534127
Data source: Temperature data for Toyokoro 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 Toyokoro

In Toyokoro in September, the total precipitation amount reaches 117 mm (4.6 in) over the course of 11 days.

September Precipitation Trends in Toyokoro

The chart displays monthly precipitation patterns in Toyokoro, 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 Toyokoro, September typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec504991807889761451171617548
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Toyokoro

In Toyokoro in September humidity is 89%. With an average temperature of 17°C (63°F), this humidity feels like a thick blanket wrapping around you, making outdoor activities feel more strenuous and less enjoyable for traveling.

September Average Humidity in Toyokoro

This chart illustrates the average monthly humidity levels in Toyokoro, 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 Toyokoro 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 Toyokoro

In Toyokoro 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 Toyokoro.

Maximum UV Index Levels in Toyokoro for September

The chart shows the monthly maximum UV Index (UVI) for Toyokoro 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 Toyokoro typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec23588101098532
Data source: Toyokoro 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 Toyokoro Compares to Other Months

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

This table compares monthly weather conditions in Toyokoro, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)50 mm (2.0 inches)84%low
February Weather-5°C (23°F)49 mm (1.9 inches)83%moderate
March Weather1°C (34°F)91 mm (3.6 inches)83%moderate
April Weather6°C (44°F)80 mm (3.1 inches)83%very high
May Weather12°C (54°F)78 mm (3.1 inches)86%very high
June Weather15°C (58°F)89 mm (3.5 inches)88%very high
July Weather18°C (65°F)76 mm (3.0 inches)93%very high
August Weather20°C (68°F)145 mm (5.7 inches)96%very high
September Weather17°C (63°F)117 mm (4.6 inches)89%very high
October Weather12°C (53°F)161 mm (6.3 inches)83%moderate
November Weather5°C (42°F)75 mm (3.0 inches)80%moderate
December Weather-3°C (28°F)48 mm (1.9 inches)79%low

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