Melbourne is on track to have its hottest run of May days in over a century, but wintry days are just around the corner. It was warmer than 25 degrees on both Thursday and Friday, more than eight degrees above average, making it the hottest pair of May days since 2002. The nights have also been warm, sitting at least four degrees above the normal May minimum of 10 degrees since Thursday. Locals will be pleased to hear that the mercury is set to tip 25 degrees again today, making it three days in a row. If it gets that warm, it will be the longest run of 25 degree days in May since way back in 1866. These pleasant conditions have been due to persistent warm, northerly winds and clear skies across the city. But locals should hit the parks while the weather permits, as a cold front crossing SA is set to bring a cold, wet and windy change. On Sunday, the morning will be the best time for outdoor activities before cloud builds and patchy rain moves in from the west during the afternoon and evening. A cold airmass will then build in the wake of the front, with the mercury struggling to reach 16 degrees on Monday. Patchy rain and gusty westerly winds will add to the chill, necessitating scarves and beanies. For the remainder of the working week the days are expected to reach the mid teens, with the nights cooling to around ten degrees and showers each day.