August Weather in Castle Hill, Australia

Last updated: August 22, 2025

In Castle Hill, Australia, the average temperature in August is a pleasant 21°C (70°F). Expect a minimum of 9°C (49°F) and a maximum reaching up to 31°C (88°F). During this time, precipitation is minimal, with an average of just 12 mm (0.5 in) over 1 day. The average humidity sits comfortably at 67%, creating a mild atmosphere perfect for exploring.

August Temperature in Castle Hill

In August in Castle Hill, the average temperature is a comfortable 21°C (70°F), making it an ideal time for outdoor activities. Maximum temperatures can reach up to 31°C (88°F), while lows can dip as low as 9°C (49°F), so packing layers would be wise for your travels. Enjoy the pleasant climate and explore everything Castle Hill has to offer!

August Weather in Castle Hill: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Castle Hill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castle Hill, August typically has an average temperature of 21°C (70°F), with highs reaching up to 31°C (88°F) and lows dropping to around 9°C (49°F).

Data source: Temperature data for Castle Hill generated using information from the Copernicus Climate Change Service.

August Precipitation in Castle Hill

In Castle Hill in August, the precipitation amount is 12 mm (0.5 in) over the course of 1 day.

August Precipitation Trends in Castle Hill

The chart displays monthly precipitation patterns in Castle Hill, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Castle Hill, August typically receives around 12 mm (0.5 inches) of precipitation spread over approximately 1 days.

Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

August Humidity in Castle Hill

In Castle Hill in August humidity is 67%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making travel a bit stifling but still enjoyable if you're prepared with light clothing and plenty of water.

August Average Humidity in Castle Hill

This chart illustrates the average monthly humidity levels in Castle Hill, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Castle Hill is approximately 67%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Castle Hill

In Castle Hill in August, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Castle Hill.

Maximum UV Index Levels in Castle Hill for August

The chart shows the monthly maximum UV Index (UVI) for Castle Hill in August, 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 August, the maximum UV index in Castle Hill typically reaches 11, which falls under the extreme exposure category.

Data source: Castle Hill August 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 August Weather in Castle Hill Compares to Other Months

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

This table compares monthly weather conditions in Castle Hill, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (82°F)	290 mm (11.4 inches)	76%	extreme
February Weather	28°C (82°F)	299 mm (11.8 inches)	78%	extreme
March Weather	27°C (81°F)	228 mm (9.0 inches)	81%	extreme
April Weather	25°C (78°F)	64 mm (2.5 inches)	76%	extreme
May Weather	22°C (73°F)	53 mm (2.1 inches)	72%	very high
June Weather	20°C (68°F)	21 mm (0.8 inches)	71%	high
July Weather	20°C (68°F)	16 mm (0.6 inches)	63%	very high
August Weather	21°C (70°F)	12 mm (0.5 inches)	67%	extreme
September Weather	22°C (73°F)	12 mm (0.5 inches)	61%	extreme
October Weather	25°C (77°F)	30 mm (1.2 inches)	62%	extreme
November Weather	26°C (80°F)	42 mm (1.7 inches)	63%	extreme
December Weather	28°C (82°F)	127 mm (5.0 inches)	69%	extreme