August Weather in Hornsby, Australia

Last updated: August 22, 2025

In August, the average temperature in Hornsby, Australia is a comfortable 13°C (55°F), with a minimum dipping to 1°C (34°F) and a maximum reaching up to 27°C (82°F). Expect around 34 mm (1.3 in) of precipitation spread over 5 days, contributing to an average humidity of 67%. Stay prepared for a range of weather conditions!

August Temperature in Hornsby

In August in Hornsby, the average temperature is 13°C (55°F). Maximum temperatures can reach 27°C (82°F), while minimums can drop to as low as 1°C (34°F). It's advisable to pack for a range of weather conditions to make the most of your trip.

August Weather in Hornsby: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Hornsby, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hornsby, August typically has an average temperature of 13°C (55°F), with highs reaching up to 27°C (82°F) and lows dropping to around 1°C (34°F).

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

August Precipitation in Hornsby

In Hornsby in August, the precipitation amount is 34 mm (1.3 in) over the course of 5 days.

August Precipitation Trends in Hornsby

The chart displays monthly precipitation patterns in Hornsby, 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 Hornsby, August typically receives around 34 mm (1.3 inches) of precipitation spread over approximately 5 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

August Humidity in Hornsby

In Hornsby in August humidity is 67%. With an average temperature of 13°C (55°F), this humidity feels like a chilly embrace, making travel a bit uncomfortable as the cool air settles in.

August Average Humidity in Hornsby

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

In Hornsby in August, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Hornsby, you can refer to this Hourly UV Index in Hornsby.

Maximum UV Index Levels in Hornsby for August

The chart shows the monthly maximum UV Index (UVI) for Hornsby 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 Hornsby typically reaches 6, which falls under the high exposure category.

Data source: Hornsby 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 Hornsby Compares to Other Months

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

This table compares monthly weather conditions in Hornsby, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	24°C (76°F)	37 mm (1.5 inches)	65%	extreme
February Weather	23°C (74°F)	107 mm (4.2 inches)	69%	extreme
March Weather	21°C (70°F)	153 mm (6.0 inches)	72%	extreme
April Weather	18°C (65°F)	29 mm (1.1 inches)	75%	very high
May Weather	15°C (59°F)	42 mm (1.7 inches)	74%	moderate
June Weather	12°C (54°F)	44 mm (1.7 inches)	72%	moderate
July Weather	12°C (53°F)	40 mm (1.6 inches)	68%	moderate
August Weather	13°C (55°F)	34 mm (1.3 inches)	67%	high
September Weather	16°C (60°F)	36 mm (1.4 inches)	63%	very high
October Weather	18°C (65°F)	67 mm (2.6 inches)	55%	very high
November Weather	20°C (68°F)	77 mm (3.0 inches)	57%	extreme
December Weather	22°C (72°F)	76 mm (3.0 inches)	68%	extreme