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September Weather in Willow Grove, Australia

Last updated: August 22, 2025

In Willow Grove, Australia, the average temperature for September hovers around 10°C (50°F). Expect the mercury to dip as low as -1°C (30°F) and occasionally rise to a warm 27°C (81°F). Be prepared for some rain, as 94 mm (3.7 in) of precipitation typically falls over 15 days, resulting in an average humidity of 77%. Stay comfortable and enjoy the unique weather this month brings!

September Temperature in Willow Grove

In September in Willow Grove, the average temperature is 10°C (50°F). Maximums can reach 27°C (81°F), while minimums can drop to as low as -1°C (30°F). This varied climate makes Willow Grove a versatile destination for travelers, offering both warm and cool experiences throughout the month.

September Weather in Willow Grove: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Willow Grove, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Willow Grove, September typically has an average temperature of 10°C (50°F), with highs reaching up to 27°C (81°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec666361565046464650545861
Data source: Temperature data for Willow Grove 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 Willow Grove

In Willow Grove in September, the precipitation amount is 94 mm (3.7 in) over a span of 15 days.

September Precipitation Trends in Willow Grove

The chart displays monthly precipitation patterns in Willow Grove, 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 Willow Grove, September typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec596160687561699894989792
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Willow Grove

In Willow Grove in September, humidity is 77%. With an average temperature of 10°C (50°F), this humidity feels like a thick, heavy blanket enveloping you, making travel uncomfortable and sticky, as it clings to your skin and clothes, turning each step into a challenge.

September Average Humidity in Willow Grove

This chart illustrates the average monthly humidity levels in Willow Grove, 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 Willow Grove is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec64%65%70%75%79%81%82%80%77%71%71%67%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Willow Grove

In Willow Grove in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Willow Grove.

Maximum UV Index Levels in Willow Grove for September

The chart shows the monthly maximum UV Index (UVI) for Willow Grove 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 Willow Grove typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec13121174335791214
Data source: Willow Grove 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 Willow Grove Compares to Other Months

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

This table compares monthly weather conditions in Willow Grove, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather19°C (66°F)59 mm (2.3 inches)64%extreme
February Weather17°C (63°F)61 mm (2.4 inches)65%extreme
March Weather16°C (62°F)60 mm (2.4 inches)70%extreme
April Weather13°C (56°F)68 mm (2.7 inches)75%high
May Weather10°C (50°F)75 mm (2.9 inches)79%moderate
June Weather8°C (46°F)61 mm (2.4 inches)81%moderate
July Weather8°C (46°F)69 mm (2.7 inches)82%moderate
August Weather8°C (46°F)98 mm (3.9 inches)80%moderate
September Weather10°C (50°F)94 mm (3.7 inches)77%high
October Weather12°C (54°F)98 mm (3.9 inches)71%very high
November Weather14°C (58°F)97 mm (3.8 inches)71%extreme
December Weather16°C (62°F)92 mm (3.6 inches)67%extreme

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