when is summer in australia sydney?
City of Sydney
contradiction
 The current date , celebrating the foundation of the Colony of New South Wales , can be seen as lacking national significance . 

entailment
 The conditions on New Year 's Day , 1947 were meteorologically sound for the formation of a storm . The day was hot and humid , with the maximum temperature recorded during the day being 32 @.@ 7 ° C ( 90 @.@ 9 ° F ) and humidity reaching 73 % . Many Sydneysiders travelled to the beaches along the coastline to benefit from the afternoon sea breeze . The general weather pattern for Sydney in summer is movement from the west to the east — from over the Blue Mountains to across the city and into the Tasman Sea . 

entailment
 During the spring and summer , conditions along the east coast of Australia are highly conducive for the formation of hailstorms . The variation of air temperature in the atmosphere ; with warm and humid air close to the ground and colder air above it causes instability , and the cold upper atmosphere temperatures allow the precipitation to fall in solid form as hailstones . Since records began in 1791 , hailstorms in the month of January form approximately 13 % of the total number of hailstorms in the Sydney metropolitan area , and over 15 % of all events with ' large hail ' . 

neutral
 The date 9 May is also sometimes suggested , being not only the date on which the first Federal Parliament was opened in Melbourne in 1901 , but also the date of the opening of the Provisional Parliament House in Canberra in 1927 , and the date of the opening of the New Parliament House in 1988 . The date has , at various times , won the support of Queensland Premier Peter Beattie , Tony Beddison , and Geoffrey Blainey . However , as with the Eureka Stockade , the date has been seen by some as being too closely connected with Victoria , and its location close to the start of winter has been described as an impediment . 

contradiction
 The 1947 Sydney hailstorm was a natural disaster which struck Sydney , Australia , on 1 January 1947 . The storm cell developed on the morning of New Year 's Day , a public holiday in Australia , over the Blue Mountains , hitting the city and dissipating east of Bondi in the mid @-@ afternoon . At the time , it was the most severe storm to strike the city since recorded observations began in 1792 . 
