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This FACT indicates the average annual morning wind speeds measured at 9am in each Australian city between the years 1981 to 2010. Wind speed, or wind velocity, is commonly measured with an anemometer. Wind speed measurement is important as it affects weather forecasts, outdoor work operations, maritime operations, construction projects and the growth rate of plants. The city with the highest wind speed average is Perth at 15.4 kilometres per hour. The city with the lowest is Sydney at 8.3 kilometres per hour, followed closely by Canberra at 8.4 kilometres per hour.