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August Weather in Perth, Canada

Last updated: June 18, 2025

In August, the average temperature in Perth, Canada hovers around 20°C (69°F). Expect a pleasant range with a minimum of 7°C (46°F) and a maximum reaching up to 32°C (90°F). However, be prepared for some rain, as 87 mm (3.4 in) of precipitation can occur over 14 days. The average humidity is a comfortable 67%, making it a delightful time to visit!

August Temperature in Perth

In August in Perth, the average temperature is 20°C (69°F). Maximums can reach 32°C (90°F) and minimums can be as low as 7°C (46°F). This makes it a perfect time for travelers to enjoy a mix of warm days and cool evenings.

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

The chart illustrates August 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, August typically has an average temperature of 20°C (69°F), with highs reaching up to 32°C (90°F) and lows dropping to around 7°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec182029425464706861493424
Data source: Temperature data for Perth generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Perth

In Perth in August, the precipitation amount is 87 mm (3.4 in) over a span of 14 days.

August Precipitation Trends in Perth

The chart displays monthly precipitation patterns in Perth, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Perth, August typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec7272751151028510787551268976
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Perth

In Perth in August, humidity is 67%. With an average temperature of 20°C (69°F), this humidity feels like a warm, gentle embrace that clings to your skin, creating a comfortable yet slightly sticky atmosphere that can be refreshing while exploring the sights, provided you stay hydrated and take breaks in the shade.

August Average Humidity in Perth

This chart illustrates the average monthly humidity levels in Perth, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Perth is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%93%86%82%75%68%69%67%72%83%88%89%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Perth

In Perth in August, 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 Perth.

Maximum UV Index Levels in Perth for August

The chart shows the monthly maximum UV Index (UVI) for Perth in August, 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 August, the maximum UV index in Perth typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245899987532
Data source: Perth August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
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 Weather5°C (42°F)115 mm (4.5 inches)82%very high
May Weather12°C (55°F)102 mm (4.0 inches)75%very high
June Weather18°C (64°F)85 mm (3.3 inches)68%very high
July Weather21°C (71°F)107 mm (4.2 inches)69%very high
August Weather20°C (69°F)87 mm (3.4 inches)67%very high
September Weather16°C (61°F)55 mm (2.2 inches)72%high
October Weather10°C (49°F)126 mm (5.0 inches)83%moderate
November Weather1°C (35°F)89 mm (3.5 inches)88%moderate
December Weather-4°C (25°F)76 mm (3.0 inches)89%low

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