Temperatures have plummeted across Tasmania, bringing the coldest mornings in a year to Hobart and frost and fog to other parts of the state. The mercury dropped three-to-four degrees below average in the state's South East and East Coast this morning, making it the coldest start since early-to-mid autumn for some places, including the capital. Hobart dipped to a chilly one degree for the second morning in a row, four below average for a June start. Getting out of bed would have been harder than usual, given that these were the coldest back-to-back mornings since last June. A high pressure ridge passing over Tasmania brought clear skies and allowed winds to remain light overnight. These conditions caused heat to radiate away from the ground under the moon's light, causing temperatures to plummet. The cold morning also caused fog to develop in parts of the Central Plateau and the South East, where visibility was reduced to just 100 metres at Melton Mowbray and Geeveston. Sub-freezing temperatures also allowed frost to develop through elevated central parts of the state. The next couple of mornings will not be as cold due to a bit more cloud and windier conditions across Tasmania. Fortunately for those still thawing out from the last two mornings, it will be more than a week before the mercury reaches one degree again in Hobart.