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September Weather in Yamaga, Japan

Last updated: August 23, 2025

In Yamaga, Japan, the average temperature in September is a pleasant 24°C (76°F). Expect comfortable highs of up to 34°C (94°F) and cooler lows dropping to 12°C (53°F). However, be prepared for some wet days, as 184 mm (7.2 in) of precipitation can occur over 14 days, resulting in an average humidity of 84%.

September Temperature in Yamaga

In September in Yamaga, the average temperature is 24°C (76°F). The maximum can reach 34°C (94°F), while the minimum can be as low as 12°C (53°F). This pleasant climate makes Yamaga an ideal destination for outdoor activities and exploration during this time.

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

The chart illustrates September temperature patterns in Yamaga, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yamaga, September typically has an average temperature of 24°C (76°F), with highs reaching up to 34°C (94°F) and lows dropping to around 12°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec424452596773798275665445
Data source: Temperature data for Yamaga 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 Yamaga

In Yamaga in September, the total precipitation amount is 184 mm (7.2 in) spread over 14 days.

September Precipitation Trends in Yamaga

The chart displays monthly precipitation patterns in Yamaga, 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 Yamaga, September typically receives around 184 mm (7.2 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec54961311322132744782771841076171
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Yamaga

In Yamaga in September humidity is 84%. With an average temperature of 24°C (76°F), this humidity feels like a warm, damp embrace that can make outdoor activities feel sticky and uncomfortable, requiring frequent breaks in the shade and plenty of hydration for travelers.

September Average Humidity in Yamaga

This chart illustrates the average monthly humidity levels in Yamaga, 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 Yamaga is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%71%71%78%84%86%92%91%84%83%81%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Yamaga

In Yamaga in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Yamaga.

Maximum UV Index Levels in Yamaga for September

The chart shows the monthly maximum UV Index (UVI) for Yamaga 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 Yamaga typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468111111121211864
Data source: Yamaga 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 Yamaga Compares to Other Months

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

This table compares monthly weather conditions in Yamaga, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)54 mm (2.1 inches)75%moderate
February Weather7°C (44°F)96 mm (3.8 inches)71%high
March Weather11°C (52°F)131 mm (5.2 inches)71%very high
April Weather15°C (59°F)132 mm (5.2 inches)78%extreme
May Weather19°C (67°F)213 mm (8.4 inches)84%extreme
June Weather23°C (73°F)274 mm (10.8 inches)86%extreme
July Weather26°C (79°F)478 mm (18.8 inches)92%extreme
August Weather28°C (82°F)277 mm (10.9 inches)91%extreme
September Weather24°C (76°F)184 mm (7.2 inches)84%extreme
October Weather19°C (66°F)107 mm (4.2 inches)83%very high
November Weather12°C (55°F)60 mm (2.4 inches)81%high
December Weather7°C (45°F)71 mm (2.8 inches)79%moderate

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