The Riverland has recorded its coldest June and July in five years.
The average minimum temperature in the region in June was 3.6 degrees and in July, overnight temperatures fell to a chilly average of just three degrees.
Mark Willgar from the Bureau of Meteorology says it has been the coldest winter since 2007 but says it is hard to say whether the trend will continue.
"That long-term stuff is probably a little bit fraught with danger," he said.
"It would just be nice to think we can keep our noses away from that droughty stuff but that's very symptomatic of big El Nino years and hopefully we go to a more sort of neutral condition over the next little bit."
He says the region's run of clear, sunny days has meant the nights have been colder.
"Because we've been in this La Nina pattern too which has been more of the rainy, cloudy type stuff, a lot of people have said we've gone through a couple of traditional winters if you like over the past two years and over the years proceeding that we had a lot of those big fine days with the very, very clear skies and the very cold overnight [temperatures]," he said.
© ABC 2012
12:01 EST Damaging westerly winds and showers have battered southern and western parts of TAS this weekend as a series of cold fronts crossed the state.