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September Weather in Kwinana, Australia

Last updated: August 22, 2025

In September, the average temperature in Kwinana, Australia hovers around 15°C (59°F), with lows dropping to 6°C (44°F) and highs reaching up to 27°C (81°F). Expect about 45 mm (1.8 in) of precipitation spread across 8 days during the month, adding to a cozy average humidity of 71%.

September Temperature in Kwinana

In September in Kwinana, the average temperature is 15°C (59°F). Maximums can reach 27°C (81°F), and minimums can be as low as 6°C (44°F). Travelers can expect mild weather ideal for outdoor activities, with warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Kwinana, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kwinana, September typically has an average temperature of 15°C (59°F), with highs reaching up to 27°C (81°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec747472676259585759626772
Data source: Temperature data for Kwinana 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 Kwinana

In Kwinana in September, the precipitation amount is 45 mm (1.8 in) over the course of 8 days.

September Precipitation Trends in Kwinana

The chart displays monthly precipitation patterns in Kwinana, 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 Kwinana, September typically receives around 45 mm (1.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec29562222631161251074544279
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Kwinana

In Kwinana in September humidity is 71%. With an average temperature of 15°C (59°F), this humidity feels like a damp embrace, making outdoor activities slightly uncomfortable and encouraging travelers to seek shade or indoor attractions to escape the muggy air.

September Average Humidity in Kwinana

This chart illustrates the average monthly humidity levels in Kwinana, 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 Kwinana is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec53%55%59%70%72%77%77%75%71%63%56%53%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Kwinana

In Kwinana in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Kwinana.

Maximum UV Index Levels in Kwinana for September

The chart shows the monthly maximum UV Index (UVI) for Kwinana 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 Kwinana typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141411864468111314
Data source: Kwinana 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 Kwinana Compares to Other Months

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

This table compares monthly weather conditions in Kwinana, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (74°F)29 mm (1.1 inches)52%extreme
February Weather23°C (74°F)56 mm (2.2 inches)55%extreme
March Weather22°C (73°F)22 mm (0.9 inches)59%extreme
April Weather20°C (68°F)22 mm (0.9 inches)70%very high
May Weather16°C (62°F)63 mm (2.5 inches)72%high
June Weather15°C (59°F)116 mm (4.6 inches)77%moderate
July Weather14°C (58°F)125 mm (4.9 inches)77%moderate
August Weather14°C (57°F)107 mm (4.2 inches)75%high
September Weather15°C (59°F)45 mm (1.8 inches)71%very high
October Weather17°C (63°F)44 mm (1.7 inches)63%extreme
November Weather19°C (67°F)27 mm (1.1 inches)56%extreme
December Weather22°C (73°F)9 mm (0.3 inches)53%extreme

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