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September Weather in Kuroiso, Japan

Last updated: August 23, 2025

In September, the average temperature in Kuroiso, Japan is a pleasant 20°C (68°F). During this time, temperatures can dip to a minimum of 9°C (48°F) and rise to a maximum of 32°C (90°F). Rainfall is also common, with an average precipitation of 196 mm (7.7 in) spread over 18 days. Additionally, you can expect high humidity levels averaging around 89%.

September Temperature in Kuroiso

In September in Kuroiso, the average temperature is 20°C (68°F). The maximum can reach 32°C (90°F), while the minimum can be as low as 9°C (48°F). This mild climate makes it an ideal time for exploring the outdoor attractions and activities in the area.

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

The chart illustrates September temperature patterns in Kuroiso, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kuroiso, September typically has an average temperature of 20°C (68°F), with highs reaching up to 32°C (90°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec343642506166737668584838
Data source: Temperature data for Kuroiso 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 Kuroiso

In Kuroiso in September, the precipitation amount is 196 mm (7.7 in) over the course of 18 days.

September Precipitation Trends in Kuroiso

The chart displays monthly precipitation patterns in Kuroiso, 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 Kuroiso, September typically receives around 196 mm (7.7 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec55501441381661603162011962626265
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Kuroiso

In Kuroiso in September, humidity is 89%. With an average temperature of 20°C (68°F), this humidity feels like walking through a warm, damp blanket that clings to your skin, making each step feel heavier and the air thick with moisture, which can be quite uncomfortable for traveling.

September Average Humidity in Kuroiso

This chart illustrates the average monthly humidity levels in Kuroiso, 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 Kuroiso is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%81%79%81%88%92%92%89%87%85%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Kuroiso

In Kuroiso 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 Kuroiso.

Maximum UV Index Levels in Kuroiso for September

The chart shows the monthly maximum UV Index (UVI) for Kuroiso 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 Kuroiso typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589101111119753
Data source: Kuroiso 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 Kuroiso Compares to Other Months

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

This table compares monthly weather conditions in Kuroiso, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)55 mm (2.2 inches)88%moderate
February Weather2°C (36°F)50 mm (2.0 inches)86%moderate
March Weather6°C (43°F)144 mm (5.7 inches)81%very high
April Weather10°C (51°F)138 mm (5.4 inches)78%very high
May Weather16°C (61°F)166 mm (6.5 inches)81%very high
June Weather19°C (66°F)160 mm (6.3 inches)88%extreme
July Weather23°C (73°F)316 mm (12.4 inches)92%extreme
August Weather24°C (76°F)201 mm (7.9 inches)92%extreme
September Weather20°C (68°F)196 mm (7.7 inches)89%very high
October Weather14°C (58°F)262 mm (10.3 inches)87%high
November Weather9°C (48°F)62 mm (2.4 inches)85%moderate
December Weather3°C (38°F)65 mm (2.5 inches)86%moderate

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