A new weather sensor installed outside the Good Loaf Bakery today is one of 20 being added to the city's network.

More than 50 Clever Weather sensors are already online in Bendigo. Most are in people's backyards, providing insights into the city's suburban environments.

Bendigo's Clever Weather network is believed to Australia's densest.

Bureau of Meteorology senior climatologist Blair Trewin said the technology would enable to bureau to study local variations in temperature in a way that had never been possible before.

City of Greater Bendigo innovation officer Chris Rowlands said the 20 new sensors were going to be in public spaces.

"People will be able to see these around their local area," he said.

A little sign accompanies each of the publicly accessible sensors, with a QR code they can scan on their smart devices to see the data direct from the source.

The sensors record temperature, humidity and air pressure.

"In the long term, I really hope we can build up a really good library of data around heat in Bendigo," Mr Rowlands said.

"Longer term, I think we can move into measuring other things like rainfall, and potentially pollution and pollen."

He was hopeful expanding the network and its capabilities would provide an understanding of what was happening throughout the city, rather than just at the Bendigo Airport.

"Over last summer we only had five or six sensors out but we saw temperature differences of four to five degrees across the city," Mr Rowlands said.

"We know heat is a big health problem, so it's really important we understand this so we can make better decisions."

He said the data could also provide insights into how successful strategies to manage heat were proving, like tree planting and different types of developments.

The data might even be able to provide insights into how irrigation was impacting heat in the surrounding area.

The head of La Trobe University's Technology Innovation Lab, Dr Simon Egerton said the sensors had also showed some areas of Bendigo were much colder than others.

"On the coldest day of the year, which I believe was back on June 24, we were reading -3 degrees at Strathfieldsaye and 1 degree at the airport," he said.

"This really gives us, for the first time, high-res fine data around the weather climates around the city."

He said the information could help identify vulnerable populations and divert resources to the areas that needed them most.

La Trobe and the city have partnered to deliver the project, which Dr Egerton said was a great demonstration of an emerging technology area, the Internet of Things.

The university will be Australia's first to offer a Master of Internet of Things, starting next year.