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September Weather in Tonosho, Japan

Last updated: August 23, 2025

In Tonosho, Japan, the average temperature in September hovers around 25°C (77°F), with a comfortable minimum of 20°C (68°F) and a peak of 31°C (88°F). Expect 187 mm (7.4 in) of precipitation over 13 days, making it a rather wet month. With an average humidity of 87%, be prepared for a warm and humid atmosphere that defines this time of year.

September Temperature in Tonosho

In September in Tonosho, the average temperature is a pleasant 25°C (77°F). Maximum temperatures can soar to 31°C (88°F), while the minimum can dip to around 20°C (68°F). This mild climate makes Tonosho an ideal destination for outdoor activities and exploration during this time of year.

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

The chart illustrates September temperature patterns in Tonosho, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tonosho, September typically has an average temperature of 25°C (77°F), with highs reaching up to 31°C (88°F) and lows dropping to around 20°C (68°F).
JanFebMarAprMayJunJulAugSepOctNovDec454449556370778177695950
Data source: Temperature data for Tonosho 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 Tonosho

In Tonosho in September, the total precipitation amount is 187 mm (7.4 in) spread over 13 days.

September Precipitation Trends in Tonosho

The chart displays monthly precipitation patterns in Tonosho, 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 Tonosho, September typically receives around 187 mm (7.4 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec45581011171191462631301872374457
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Tonosho

In Tonosho in September, humidity is 87%. With an average temperature of 25°C (77°F), this humidity feels like a thick, warm blanket enveloping you, making travel a challenge as sweat clings to your skin and the air feels heavy and stifling.

September Average Humidity in Tonosho

This chart illustrates the average monthly humidity levels in Tonosho, 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 Tonosho is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%73%74%84%86%92%92%87%85%84%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Tonosho

In Tonosho 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 Tonosho.

Maximum UV Index Levels in Tonosho for September

The chart shows the monthly maximum UV Index (UVI) for Tonosho 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 Tonosho typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec458111111121110754
Data source: Tonosho 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 Tonosho Compares to Other Months

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

This table compares monthly weather conditions in Tonosho, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)45 mm (1.8 inches)82%moderate
February Weather7°C (45°F)58 mm (2.3 inches)79%moderate
March Weather10°C (50°F)101 mm (4.0 inches)73%very high
April Weather13°C (56°F)117 mm (4.6 inches)74%extreme
May Weather17°C (64°F)119 mm (4.7 inches)84%extreme
June Weather21°C (70°F)146 mm (5.7 inches)86%extreme
July Weather25°C (78°F)263 mm (10.4 inches)92%extreme
August Weather27°C (81°F)129 mm (5.1 inches)92%extreme
September Weather25°C (77°F)187 mm (7.4 inches)87%very high
October Weather20°C (69°F)237 mm (9.3 inches)85%high
November Weather15°C (60°F)44 mm (1.7 inches)84%moderate
December Weather10°C (50°F)57 mm (2.2 inches)82%moderate

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