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September Weather in Okazaki, Japan

Last updated: August 23, 2025

In September the average temperature in Okazaki, Japan hovers around 24°C (75°F), creating a pleasant climate. However, be prepared for fluctuations, as temperatures can range from a cool 13°C (55°F) to a sweltering 34°C (94°F). With an average precipitation of 225 mm (8.8 in) over 19 days, you might want to pack an umbrella. It’s also worth noting that the average humidity stands at a high 87%, adding to the tropical feel of the month.

September Temperature in Okazaki

In September in Okazaki, the average temperature is 24°C (75°F). Maximums can reach 34°C (94°F) and minimums can be as low as 13°C (55°F). This makes it an ideal time to explore outdoor activities while enjoying mild evenings and warm days.

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

The chart illustrates September temperature patterns in Okazaki, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Okazaki, September typically has an average temperature of 24°C (75°F), with highs reaching up to 34°C (94°F) and lows dropping to around 13°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec404250576672798275655445
Data source: Temperature data for Okazaki 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 Okazaki

In Okazaki in September, the precipitation amount is 225 mm (8.8 in) spread over 19 days, indicating a relatively wet period for the region.

September Precipitation Trends in Okazaki

The chart displays monthly precipitation patterns in Okazaki, 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 Okazaki, September typically receives around 225 mm (8.8 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec52661531711962144472442252626162
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Okazaki

In Okazaki in September, humidity is 87%. With an average temperature of 24°C (75°F), this humidity feels like a warm, sticky embrace that clings to your skin, making outdoor activities feel heavier and more exhausting, and the air thickens, leaving you longing for shade and refreshing breezes as you navigate your adventures.

September Average Humidity in Okazaki

This chart illustrates the average monthly humidity levels in Okazaki, 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 Okazaki is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%74%76%83%87%93%91%87%85%83%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Okazaki

In Okazaki 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 Okazaki.

Maximum UV Index Levels in Okazaki for September

The chart shows the monthly maximum UV Index (UVI) for Okazaki 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 Okazaki typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111121110753
Data source: Okazaki 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 Okazaki Compares to Other Months

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

This table compares monthly weather conditions in Okazaki, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)52 mm (2.0 inches)82%moderate
February Weather5°C (42°F)66 mm (2.6 inches)79%high
March Weather10°C (50°F)153 mm (6.0 inches)74%very high
April Weather14°C (58°F)171 mm (6.7 inches)76%very high
May Weather19°C (66°F)196 mm (7.7 inches)83%extreme
June Weather22°C (72°F)214 mm (8.4 inches)87%extreme
July Weather26°C (79°F)447 mm (17.6 inches)93%extreme
August Weather28°C (82°F)244 mm (9.6 inches)91%extreme
September Weather24°C (75°F)225 mm (8.8 inches)87%very high
October Weather18°C (65°F)262 mm (10.3 inches)85%high
November Weather12°C (55°F)61 mm (2.4 inches)83%moderate
December Weather7°C (45°F)62 mm (2.4 inches)83%moderate

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