May Weather in Hornsby, Australia

Last updated: August 22, 2025

In Hornsby, Australia, the average temperature in May hovers around 15°C (59°F). Expect a range that can dip to a brisk 1°C (35°F) and rise to a warm 27°C (82°F). During this month, you can anticipate around 42 mm (1.7 in) of precipitation spread across 5 days, with an average humidity level of 74%. Stay prepared for varying conditions!

May Temperature in Hornsby

In May in Hornsby, the average temperature is 15°C (59°F). Maximum temperatures can reach 27°C (82°F), while minimum temperatures can dip as low as 1°C (35°F). This weather makes Hornsby an ideal destination for travelers seeking a mix of pleasant warmth and cooler evenings.

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

The chart illustrates May 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, May typically has an average temperature of 15°C (59°F), with highs reaching up to 27°C (82°F) and lows dropping to around 1°C (35°F).

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

May Precipitation in Hornsby

In Hornsby in May, the precipitation amount is 42 mm (1.7 in) over a span of 5 days.

May Precipitation Trends in Hornsby

The chart displays monthly precipitation patterns in Hornsby, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Hornsby, May typically receives around 42 mm (1.7 inches) of precipitation spread over approximately 5 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Hornsby

In Hornsby in May, humidity is 74%. With an average temperature of 15°C (59°F), this humidity feels like traveling through a warm, sticky blanket that clings to your skin, making outdoor activities a bit uncomfortable and prompting you to seek out shaded areas or cool breezes.

May Average Humidity in Hornsby

This chart illustrates the average monthly humidity levels in Hornsby, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Hornsby is approximately 74%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Hornsby

In Hornsby in May, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Hornsby.

Maximum UV Index Levels in Hornsby for May

The chart shows the monthly maximum UV Index (UVI) for Hornsby in May, 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 May, the maximum UV index in Hornsby typically reaches 5, which falls under the moderate exposure category.

Data source: Hornsby May 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 May 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 May’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 May’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