May Weather in Castle Hill, Australia

Last updated: August 22, 2025

In May, the average temperature in Castle Hill, Australia hovers around 22°C (73°F), with temperatures ranging from a cool 10°C (51°F) to a warm 31°C (87°F). Expect an average humidity of 72%, along with 53 mm (2.1 in) of precipitation spread over about 6 days. Embrace the mild climate while planning your activities!

May Temperature in Castle Hill

In May, in Castle Hill, the average temperature is 22°C (73°F). The maximum can reach 31°C (87°F) and the minimum can be as low as 10°C (51°F). This mild climate makes it a great time for traveling, offering ideal conditions for outdoor activities and sightseeing.

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

The chart illustrates May 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, May typically has an average temperature of 22°C (73°F), with highs reaching up to 31°C (87°F) and lows dropping to around 10°C (51°F).

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

May Precipitation in Castle Hill

In Castle Hill in May, the precipitation amount is 53 mm (2.1 in) over a span of 6 days.

May Precipitation Trends in Castle Hill

The chart displays monthly precipitation patterns in Castle Hill, 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 Castle Hill, May typically receives around 53 mm (2.1 inches) of precipitation spread over approximately 6 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Castle Hill

In Castle Hill in May, humidity is 72%. With an average temperature of 22°C (73°F), this humidity feels like a warm embrace, making it ideal for leisurely strolls but potentially uncomfortable for prolonged outdoor activities.

May Average Humidity in Castle Hill

This chart illustrates the average monthly humidity levels in Castle Hill, 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 Castle Hill is approximately 72%, 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 Castle Hill

In Castle Hill in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Castle Hill.

Maximum UV Index Levels in Castle Hill for May

The chart shows the monthly maximum UV Index (UVI) for Castle Hill 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 Castle Hill typically reaches 9, which falls under the very high exposure category.

Data source: Castle Hill 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 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 May’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 May’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