The Big Thermometer has been unveiled in Stanthorpe. Credit:Sandra McEwan‎

After 20 years of discussions, Queensland's coldest town has celebrated its title by unveiling the Big Thermometer as its latest tourist attraction.

Residents hope the Bureau of Meteorology, which takes its temperature readings from nearby Applethorpe, will use the equipment built into the tourist attraction to record temperatures in Stanthorpe, located about 220 kilometres south-west of Brisbane near the state border.

Stanthorpe and Granite Belt Chamber of Commerce board member Josh Cavallaro said the latest push to construct the Big Thermometer had started mid-2017 and its unveiling had ended two decades of waiting.

"There were a few issues with the design and location previously so it never really took off ... and people lost interest with the negativity around it," he said.