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March Weather in Perth, Canada

Last updated: June 18, 2025

In March, the average temperature in Perth, Canada hovers around -2°C (29°F). Expect frosty minimums dropping to -21°C (-6°F), while the mercury may peak at a balmy 20°C (68°F). With an average precipitation of 75 mm (2.9 in) spread over 10 days, and humidity levels soaring at 86%, this month offers a unique mix of crisp air and the possibility of wintry weather.

March Temperature in Perth

In March in Perth, the average temperature is -2°C (29°F), with maximums reaching 20°C (68°F) and minimums dropping as low as -21°C (-6°F). It's advisable to dress in layers and be prepared for a wide range of temperatures while traveling during this time.

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

The chart illustrates March 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, March typically has an average temperature of -2°C (29°F), with highs reaching up to 20°C (68°F) and lows dropping to around -21°C (-6°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.

March Precipitation in Perth

In Perth in March, the precipitation amount is 75 mm (2.9 in) spread over a period of 10 days.

March Precipitation Trends in Perth

The chart displays monthly precipitation patterns in Perth, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Perth, March typically receives around 75 mm (2.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec7272751151028510787551268976
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Perth

In Perth in March humidity is 86%. With an average temperature of -2°C (29°F), this humidity feels like a damp chill that seeps through layers of clothing, making outdoor activities uncomfortable and travel plans challenging.

March Average Humidity in Perth

This chart illustrates the average monthly humidity levels in Perth, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Perth is approximately 86%, 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 March generated using information from the Copernicus Climate Change Service.

March UV Index in Perth

In Perth in March, 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 March

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