The mercury has plummeted again across large parts of Victoria and Tasmania this morning, continuing the run of very cold mornings experienced over the past few days. Many residents would have enjoyed the opportunity to stay in bed a bit longer, with some places seeing their coldest nights in years. In VIC, the streams would have been cold at Coldstream with the outer Melbourne town dipping to just -4.8 degrees, its coldest night in 15 years. Meanwhile, Melbourne city chilled to 2.9 degrees. The last three mornings have now averaged just 2.8 degrees, the coldest triplet of mornings since 1998. Nearby Melbourne suburbs also froze, with Moorabbin dropping to -1.7 degrees, its coldest in seven years, while Cerberus dipped to -1.5 degrees, its coldest in eight years. In TAS, Hobart endured another frosty morning, with the city chilling to 0.2 degrees, its coldest in six years and its coldest pair of nights in fifteen years. Elsewhere in TAS, Strahan on the West Coast dipped to -1.9 degrees, its coldest night in two years, and its coldest for June in 30 years. Liawenee on the Central Plateau recorded its second consecutive minus nine degree morning in a row, which has not occurred in at least 13 years. The cause of the run of cold mornings has been a persistent high pressure ridge causing clear skies and light winds over the region. Another bone-chilling night is on the cards tonight, with both Hobart and Melbourne expected to dip to three degrees. Those who don't like the cold will be pleased to know that nights will become a little bit warmer in VIC from Monday as the air mass warms and cloud increases. However, TAS will have to wait until at least mid-week until the nights begin to warm up again.