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August Weather in Sydney, Canada

Last updated: June 18, 2025

In August, the average temperature in Sydney, Canada is a pleasant 20°C (68°F). However, temperatures can vary significantly, with a minimum of 11°C (52°F) and a maximum reaching 28°C (83°F). Expect about 68 mm (2.7 in) of precipitation over 10 days, contributing to an average humidity level of 90%.

August Temperature in Sydney

In August in Sydney, the average temperature is 20°C (68°F). Maximums can reach 28°C (83°F), while minimums can dip as low as 11°C (52°F). This mild climate makes Sydney an ideal destination for travelers looking to enjoy pleasant weather and outdoor activities.

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

The chart illustrates August temperature patterns in Sydney, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sydney, August typically has an average temperature of 20°C (68°F), with highs reaching up to 28°C (83°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec272528374455646860514133
Data source: Temperature data for Sydney 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 Sydney

In Sydney in August, the precipitation amount is 68 mm (2.7 in) over a span of 10 days.

August Precipitation Trends in Sydney

The chart displays monthly precipitation patterns in Sydney, 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 Sydney, August typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec113131118140109102936893108182134
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Sydney

In Sydney in August humidity is 90%. With an average temperature of 20°C (68°F), this humidity feels like a heavy blanket enveloping you, making it feel much warmer than the actual temperature. Travelers may find themselves sweating easily and seeking shade, as the thick, humid air clings to the skin and can quickly lead to fatigue.

August Average Humidity in Sydney

This chart illustrates the average monthly humidity levels in Sydney, 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 Sydney is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%87%87%87%88%89%91%90%86%82%83%83%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Sydney

In Sydney 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 Sydney.

Maximum UV Index Levels in Sydney for August

The chart shows the monthly maximum UV Index (UVI) for Sydney 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 Sydney typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2357910887532
Data source: Sydney 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 Sydney Compares to Other Months

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

This table compares monthly weather conditions in Sydney, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)113 mm (4.5 inches)86%low
February Weather-4°C (25°F)131 mm (5.2 inches)87%moderate
March Weather-2°C (29°F)118 mm (4.6 inches)87%moderate
April Weather3°C (37°F)140 mm (5.5 inches)87%high
May Weather7°C (45°F)109 mm (4.3 inches)88%very high
June Weather13°C (55°F)102 mm (4.0 inches)89%very high
July Weather18°C (64°F)93 mm (3.7 inches)91%very high
August Weather20°C (68°F)68 mm (2.7 inches)90%very high
September Weather16°C (60°F)93 mm (3.7 inches)86%high
October Weather10°C (51°F)108 mm (4.2 inches)82%moderate
November Weather5°C (42°F)182 mm (7.2 inches)83%moderate
December Weather0°C (33°F)134 mm (5.3 inches)83%low

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