October Weather in Hornsby, Australia

Last updated: August 22, 2025

In October, the average temperature in Hornsby, Australia hovers around 18°C (65°F), with a range that can dip to a chilly 7°C (45°F) and soar up to a warm 36°C (98°F). Expect some rainy days as the region receives an average precipitation of 67 mm (2.6 in) spread over 11 days. With an average humidity level of 55%, prepare for a pleasantly balanced climate this time of year!

October Temperature in Hornsby

In October in Hornsby, the average temperature is 18°C (65°F), with maximums reaching up to 36°C (98°F) and minimums dropping as low as 7°C (45°F). This makes it a great time for travelers to enjoy mild weather while exploring the local attractions.

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

The chart illustrates October 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, October typically has an average temperature of 18°C (65°F), with highs reaching up to 36°C (98°F) and lows dropping to around 7°C (45°F).

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

October Precipitation in Hornsby

In Hornsby in October, the total precipitation amount is 67 mm (2.6 in) over the course of 11 days.

October Precipitation Trends in Hornsby

The chart displays monthly precipitation patterns in Hornsby, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Hornsby, October typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 11 days.

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

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Millimeters (mm) Inches (in)

October Humidity in Hornsby

In Hornsby in October humidity is 55%. With an average temperature of 18°C (65°F), this humidity feels like a gentle embrace, creating a comfortable yet slightly sticky atmosphere that is perfect for leisurely strolls and outdoor adventures.

October Average Humidity in Hornsby

This chart illustrates the average monthly humidity levels in Hornsby, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Hornsby is approximately 55%, offering insight into how humid the weather typically is during this month.

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

October UV Index in Hornsby

In Hornsby in October, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Hornsby.

Maximum UV Index Levels in Hornsby for October

The chart shows the monthly maximum UV Index (UVI) for Hornsby in October, 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 October, the maximum UV index in Hornsby typically reaches 10, which falls under the very high exposure category.

Data source: Hornsby October 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 October 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 October’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 October’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