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September Weather in Glenbrook, Australia

Last updated: August 22, 2025

In Glenbrook, Australia, the average temperature in September hovers around 13°C (55°F), making it a comfortable time to explore. However, be prepared for a range of temperatures, with minimums dropping to 1°C (33°F) and highs reaching up to 31°C (89°F). During this month, expect 43 mm (1.7 in) of precipitation over about 6 days, and average humidity levels at 63% can add a bit of a tropical feel to your outdoor adventures.

September Temperature in Glenbrook

In September in Glenbrook, the average temperature is 13°C (55°F), with maximums reaching up to 31°C (89°F) and minimums dropping as low as 1°C (33°F). This climate makes it essential for travelers to pack a variety of clothing to accommodate both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Glenbrook, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Glenbrook, September typically has an average temperature of 13°C (55°F), with highs reaching up to 31°C (89°F) and lows dropping to around 1°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec726966605449485055606468
Data source: Temperature data for Glenbrook 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 Glenbrook

In Glenbrook in September, the precipitation amount is 43 mm (1.7 in) over a period of 6 days.

September Precipitation Trends in Glenbrook

The chart displays monthly precipitation patterns in Glenbrook, 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 Glenbrook, September typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec7916022128383132444386124122
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Glenbrook

In Glenbrook in September, humidity is 63%. With an average temperature of 13°C (55°F), this humidity feels like a light, misty embrace, making outdoor exploration refreshing yet slightly damp.

September Average Humidity in Glenbrook

This chart illustrates the average monthly humidity levels in Glenbrook, 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 Glenbrook is approximately 63%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec65%69%72%75%74%72%68%67%63%55%58%68%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Glenbrook

In Glenbrook 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 Glenbrook.

Maximum UV Index Levels in Glenbrook for September

The chart shows the monthly maximum UV Index (UVI) for Glenbrook 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 Glenbrook typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151412864468111215
Data source: Glenbrook 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 Glenbrook Compares to Other Months

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

This table compares monthly weather conditions in Glenbrook, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather22°C (72°F)79 mm (3.1 inches)65%extreme
February Weather20°C (69°F)160 mm (6.3 inches)69%extreme
March Weather19°C (66°F)221 mm (8.7 inches)72%extreme
April Weather16°C (61°F)28 mm (1.1 inches)75%very high
May Weather12°C (54°F)38 mm (1.5 inches)74%high
June Weather10°C (49°F)31 mm (1.2 inches)72%moderate
July Weather9°C (49°F)32 mm (1.2 inches)68%moderate
August Weather10°C (50°F)44 mm (1.7 inches)67%high
September Weather13°C (55°F)43 mm (1.7 inches)63%very high
October Weather16°C (60°F)86 mm (3.4 inches)55%extreme
November Weather18°C (64°F)124 mm (4.9 inches)57%extreme
December Weather20°C (68°F)122 mm (4.8 inches)68%extreme

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