Frost and thick fog formed in and around Hobart this morning as the mercury plummeted. Hobart had its coldest morning in five years, dropping to a very chilly 0.4 degrees. Frost formed on the grass and on car windscreens in the city and across most inland areas. The temperature has struggled to rise in Hobart as areas of fog have obscured the sunshine, halting most morning warming. Fog was very thick this morning in Grove and Bushy Park with visibility less than 50 metres at 9am. Bushy Park was the coldest in the region, falling to minus four degrees early in the morning. It only scraped above freezing just before 10am. Each morning until Tuesday is likely to be quite cold in Hobart with areas of frost and fog likely, particularly for inland areas. The city could easily experience frost again on a number of mornings. Daytime temperatures will remain cold with the mercury reaching between 11 and 13 degrees with mostly sunny days.