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September Weather in Anan, Japan

Last updated: August 23, 2025

In Anan, Japan, the average temperature in September hovers around 25°C (77°F). Expect a pleasant range, with minimums dropping to 20°C (68°F) and maximums peaking at 29°C (85°F). However, be prepared for some rain, as precipitation averages 233 mm (9.2 in) over 15 days, alongside a notably high humidity level of 85%.

September Temperature in Anan

In September in Anan, the average temperature is 25°C (77°F). Maximum can reach 29°C (85°F), and minimum can be as low as 20°C (68°F). This pleasant weather makes it an ideal time to explore the sights and enjoy outdoor activities.

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

The chart illustrates September temperature patterns in Anan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Anan, September typically has an average temperature of 25°C (77°F), with highs reaching up to 29°C (85°F) and lows dropping to around 20°C (68°F).
JanFebMarAprMayJunJulAugSepOctNovDec484752586571788177706153
Data source: Temperature data for Anan 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 Anan

In Anan in September, the total precipitation amount reaches 233 mm (9.2 in) over the course of 15 days.

September Precipitation Trends in Anan

The chart displays monthly precipitation patterns in Anan, 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 Anan, September typically receives around 233 mm (9.2 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec59691281281752002751402333376468
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Anan

In Anan in September, humidity is 85%. With an average temperature of 25°C (77°F), this humidity feels like a warm, heavy blanket wrapping around you, making every outdoor excursion feel both stifling and sticky, requiring frequent breaks in the shade to stay comfortable while exploring.

September Average Humidity in Anan

This chart illustrates the average monthly humidity levels in Anan, 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 Anan is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%70%70%76%83%86%91%88%85%82%79%77%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Anan

In Anan 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 Anan.

Maximum UV Index Levels in Anan for September

The chart shows the monthly maximum UV Index (UVI) for Anan 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 Anan typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468111111121110764
Data source: Anan 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 Anan Compares to Other Months

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

This table compares monthly weather conditions in Anan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)59 mm (2.3 inches)74%moderate
February Weather9°C (48°F)68 mm (2.7 inches)70%high
March Weather11°C (53°F)128 mm (5.0 inches)70%very high
April Weather14°C (58°F)128 mm (5.0 inches)76%extreme
May Weather18°C (65°F)174 mm (6.9 inches)82%extreme
June Weather22°C (71°F)200 mm (7.9 inches)86%extreme
July Weather25°C (78°F)275 mm (10.8 inches)91%extreme
August Weather27°C (81°F)140 mm (5.5 inches)88%extreme
September Weather25°C (77°F)233 mm (9.2 inches)85%very high
October Weather21°C (70°F)337 mm (13.3 inches)82%high
November Weather16°C (62°F)64 mm (2.5 inches)79%high
December Weather11°C (53°F)68 mm (2.7 inches)77%moderate

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