Data confidence level:
This FACT indicates the average annual afternoon wind speeds, in kilometres per hour, measured at 3pm 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 tied between Perth and Brisbane at 19.5 kilometres per hour. The city with the lowest is Melbourne at 12.2 kilometres per hour, followed closely by Sydney, at 13.9 kilometres per hour.