July Weather in Perth, Canada

Last updated: June 18, 2025

In Perth, Canada, the average temperature in July hovers around 21°C (71°F), making it a pleasant time to visit. Expect temperatures to range from a cool 10°C (50°F) to a warm 34°C (93°F). With an average precipitation of 107 mm (4.2 in) spread across 13 days, don’t forget to pack an umbrella! Additionally, the average humidity levels at 69% can add a touch of mugginess to those warm days.

July Temperature in Perth

In July in Perth, the average temperature is 21°C (71°F). The maximum can reach 34°C (93°F), while the minimum can drop as low as 10°C (50°F). It’s a great time to visit if you enjoy warm weather with some cooler evenings!

July Weather in Perth: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Perth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Perth, July typically has an average temperature of 21°C (71°F), with highs reaching up to 34°C (93°F) and lows dropping to around 10°C (50°F).

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

July Precipitation in Perth

In Perth in July, the total precipitation amount is 107 mm (4.2 in) distributed over a span of 13 days.

July Precipitation Trends in Perth

The chart displays monthly precipitation patterns in Perth, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Perth, July typically receives around 107 mm (4.2 inches) of precipitation spread over approximately 13 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

July Humidity in Perth

In Perth in July humidity is 69%. With an average temperature of 21°C (71°F), this humidity feels like a warm embrace, creating a tropical atmosphere that can make outdoor activities feel slightly sticky, yet invigorating for travelers who are ready to embrace the local culture and explore.

July Average Humidity in Perth

This chart illustrates the average monthly humidity levels in Perth, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Perth is approximately 69%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Perth

In Perth in July, 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 Perth.

Maximum UV Index Levels in Perth for July

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

Data source: Perth July 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 July Weather in Perth Compares to Other Months

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

This table compares monthly weather conditions in Perth, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (18°F)	72 mm (2.8 inches)	93%	low
February Weather	-7°C (20°F)	72 mm (2.8 inches)	93%	moderate
March Weather	-2°C (29°F)	75 mm (2.9 inches)	86%	moderate
April Weather	5°C (42°F)	115 mm (4.5 inches)	82%	very high
May Weather	12°C (55°F)	102 mm (4.0 inches)	75%	very high
June Weather	18°C (64°F)	85 mm (3.3 inches)	68%	very high
July Weather	21°C (71°F)	107 mm (4.2 inches)	69%	very high
August Weather	20°C (69°F)	87 mm (3.4 inches)	67%	very high
September Weather	16°C (61°F)	55 mm (2.2 inches)	72%	high
October Weather	10°C (49°F)	126 mm (5.0 inches)	83%	moderate
November Weather	1°C (35°F)	89 mm (3.5 inches)	88%	moderate
December Weather	-4°C (25°F)	76 mm (3.0 inches)	89%	low