April Weather in Hornsby, Australia

Last updated: August 22, 2025

In Hornsby, Australia, the average temperature in April is a pleasant 18°C (65°F), with a range that can dip to a chilly 5°C (42°F) and soar to a warm 35°C (96°F). During this month, expect about 29 mm (1.1 in) of precipitation over 6 days, accompanied by an average humidity of 75%. Enjoy the mild climate while staying prepared for occasional rain!

April Temperature in Hornsby

In April in Hornsby, the average temperature is 18°C (65°F). Maximums can reach 35°C (96°F), and minimums can be as low as 5°C (42°F). This makes it an ideal time for travelers to enjoy a mix of warm days and cooler evenings.

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

The chart illustrates April 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, April typically has an average temperature of 18°C (65°F), with highs reaching up to 35°C (96°F) and lows dropping to around 5°C (42°F).

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

April Precipitation in Hornsby

In Hornsby in April, the precipitation amount is 29 mm (1.1 in) over the course of 6 days.

April Precipitation Trends in Hornsby

The chart displays monthly precipitation patterns in Hornsby, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Hornsby, April typically receives around 29 mm (1.1 inches) of precipitation spread over approximately 6 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Hornsby

In Hornsby in April, humidity is 75%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket that can make outdoor exploration feel a bit stifling, potentially leading to discomfort during travel activities.

April Average Humidity in Hornsby

This chart illustrates the average monthly humidity levels in Hornsby, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Hornsby is approximately 75%, offering insight into how humid the weather typically is during this month.

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

April UV Index in Hornsby

In Hornsby in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Hornsby.

Maximum UV Index Levels in Hornsby for April

The chart shows the monthly maximum UV Index (UVI) for Hornsby in April, 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 April, the maximum UV index in Hornsby typically reaches 8, which falls under the very high exposure category.

Data source: Hornsby April 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 April 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 April’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 April’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