Temperatures have plummeted across Queensland during the past 24 hours with most of the state shivering through its coldest weather in a year. At 2pm on Thursday afternoon, normally the warmest time of day, the temperature was just five degrees at Stanthorpe, eight degrees in Inglewood and nine degrees at Toowoomba. With showers falling through the day it is likely that sleet or even snow has been falling on the higher peaks of southern Queensland. South of the border Guyra reported 7cm of snow to 9am Thursday morning. It will become even colder overnight with weatherzone.com.au forecasting lows as much as seven below average. This will lead to widespread frost over inland districts as far north as the Atherton Tablelands. While days will gradually warm up over the weekend nights will remain cold with further widespread frost likely over southern and central Queensland until early next week. Brisbane should wake to just five degrees on Saturday morning, the city's coldest start since August.