Perth residents got their first real taste of winter during the last week, with the city shivering through a run of cold nights. The mercury dipped to just three degrees last night, making it difficult for some residents to get out of bed this morning. It also marked the sixth consecutive night the mercury dipped below six degrees, the first time this has occurred in June since 2010. This run included the coldest night/morning of the year on Saturday when it dipped to just 1.9 degrees. The spell of cold nights has been caused by a stubborn high pressure system which created a combination of clear skies and light winds, allowing any daytime heat to rapidly dissipate. However, this morning was the coldest it is going to be for at least a week, with minimum temperatures likely to return closer to average. This is due to windier, wetter and cloudier conditions on the way, as a vigorous cold front sweeps across the city from tomorrow.