BY 2050, Gunnedah will be an average of 4.6 degrees hotter, making it one of the most climate-change impacted regions in the nation, according to a new report.
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The study by the Australian National University (ANU) modelled the worst-case scenario, which could "be avoided with sharp cuts to climate pollution".
It shows Curlewis, Breeza and Carroll would also be an an average 4.6 degrees hotter.
The Parkes electorate would be an average of 4.3 degrees hotter, the fourth most impacted electorate, based of the largest average temperature increase from the historical baseline of 1960 to 1990 to 2050 projections.
Special Envoy for Drought Barnaby Joyce pointed the finger at larger countries such as the US, China and India.
"There is no policy in Australia that will be able to change the nation's temperature for hotter or colder," Mr Joyce said.
"All we can do is affect our own economy and follow in the dust of other countries."
Mr Joyce said while Australia should meet its climate obligations, it should not come at the expense of jobs, industries or low power bills.
The ANU report said eight of the top 20 electorates impacted by climate change are held by Nationals MPs, including five of the top six.
Australian Conservation Foundation CEO Kelly O'Shanassy said it was disappointing many of the federal electorates found to have the highest increases were represented by MPs who "do little to champion climate action, or worse, deny the established science".