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September Weather in Settsu, Japan

Last updated: August 23, 2025

In Settsu, Japan, the average temperature in September hovers around a warm 25°C (78°F). Expect a minimum of 15°C (59°F) and a maximum that can soar up to 37°C (99°F). With 169 mm (6.7 in) of precipitation spread over 15 days, the atmosphere tends to be quite humid, averaging around 87%. Perfect for a tropical getaway!

September Temperature in Settsu

In September, in Settsu, the average temperature is 25°C (78°F). Maximums can reach 37°C (99°F), and minimums can be as low as 15°C (59°F). This pleasant weather makes it an ideal time for exploring outdoor activities and enjoying the local attractions.

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

The chart illustrates September temperature patterns in Settsu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Settsu, September typically has an average temperature of 25°C (78°F), with highs reaching up to 37°C (99°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec424351596874828577675647
Data source: Temperature data for Settsu 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 Settsu

In Settsu in September, the precipitation amount is 169 mm (6.7 in) over a span of 15 days.

September Precipitation Trends in Settsu

The chart displays monthly precipitation patterns in Settsu, 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 Settsu, September typically receives around 169 mm (6.7 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec46601091351501472821831692304457
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Settsu

In Settsu in September, humidity is 87%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities particularly strenuous and requiring frequent breaks for hydration and shade.

September Average Humidity in Settsu

This chart illustrates the average monthly humidity levels in Settsu, 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 Settsu 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 Settsu

In Settsu 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 Settsu.

Maximum UV Index Levels in Settsu for September

The chart shows the monthly maximum UV Index (UVI) for Settsu 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 Settsu typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468111111121110753
Data source: Settsu 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 Settsu Compares to Other Months

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

This table compares monthly weather conditions in Settsu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)46 mm (1.8 inches)82%moderate
February Weather6°C (43°F)60 mm (2.3 inches)79%high
March Weather10°C (51°F)109 mm (4.3 inches)74%very high
April Weather15°C (59°F)135 mm (5.3 inches)76%extreme
May Weather20°C (69°F)150 mm (5.9 inches)83%extreme
June Weather24°C (75°F)147 mm (5.8 inches)87%extreme
July Weather28°C (82°F)282 mm (11.1 inches)93%extreme
August Weather29°C (85°F)183 mm (7.2 inches)91%extreme
September Weather25°C (78°F)169 mm (6.7 inches)87%very high
October Weather20°C (67°F)230 mm (9.0 inches)85%high
November Weather13°C (56°F)44 mm (1.7 inches)83%moderate
December Weather8°C (47°F)57 mm (2.2 inches)83%moderate

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