It feels like summer in the city ... but don't get too used to it. Temperatures will dip to a wintry 15 degrees by Thursday. Credit:Leigh Henningham

After a cracking weekend weather-wise, Melbourne's warm blast of summer won't last.

The hot and humid start to the week will be followed by thunderstorms, chilly temperatures and potentially even snow in the alpine regions.

"We are expecting if we get snow, it will be during Thursday and Friday," Bureau of Meteorology senior forecaster Chris Godfred said.

"The snow should get as low as 1000 metres on Thursday and includes the alpine peaks, Mount Baw Baw and the high plains around there. There may be the outside chance of some flurries on top of Mount Macedon and the Grampians."