Melbourne has a moderate oceanic climate and is well known for its changeable weather conditions. This is due different pressure system and wind pattern, a combination that creates weather systems that often circle the bay. The phrase "four seasons in one day" is part of popular culture and observed by many visitors to the city. Melbourne is colder than other mainland Australian state capital cities in the winter.More commonly, Melbourne experiences frosts and fog in winter. During the spring, Melbourne commonly enjoys extended periods of mild weather and clear skies. Melbourne and Sydney's average January and February daily highs are similar. However, Melbourne's summers are notable for days of extreme heat, with Melbourne holding the Australian capital city extreme temperature record of 46.4°C, set on 7 February 2009 The most popular months to visit Melbourne are January, February, March, April, May, November, December.