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October Weather in Perth, Canada

Last updated: June 18, 2025

In October, the average temperature in Perth, Canada hovers around 10°C (49°F). You may experience a chill with minimums dropping to -4°C (25°F), while the mercury can rise to a pleasant 26°C (80°F) on warmer days. Be prepared for 126 mm (5.0 in) of precipitation over about 13 days, and stay comfortable with an average humidity of 83%.

October Temperature in Perth

In October in Perth, the average temperature is 10°C (49°F). Maximum temperatures can reach 26°C (80°F), while minimum temperatures can drop as low as -4°C (25°F). Travelers should be prepared for a range of weather conditions, from mild days to chilly nights.

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

The chart illustrates October 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, October typically has an average temperature of 10°C (49°F), with highs reaching up to 26°C (80°F) and lows dropping to around -4°C (25°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.

October Precipitation in Perth

In Perth in October, the precipitation amount is 126 mm (5.0 in) over the course of 13 days.

October Precipitation Trends in Perth

The chart displays monthly precipitation patterns in Perth, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Perth, October typically receives around 126 mm (5.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec7272751151028510787551268976
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Perth

In Perth in October humidity is 83%. With an average temperature of 10°C (49°F), this humidity feels like a damp chill enveloping you, making outdoor activities feel more uncomfortable and potentially dampening your travel experience.

October Average Humidity in Perth

This chart illustrates the average monthly humidity levels in Perth, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Perth is approximately 83%, 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 October generated using information from the Copernicus Climate Change Service.

October UV Index in Perth

In Perth in October, 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 Perth.

Maximum UV Index Levels in Perth for October

The chart shows the monthly maximum UV Index (UVI) for Perth in October, 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 October, the maximum UV index in Perth typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245899987532
Data source: Perth October 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 October 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 October’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 October’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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