Sydney and the rest of NSW can expect more hot days, shifting rainfall patterns and more extreme fire danger weather as a result of global warming, according to the first high-resolution modelling of the future climate.

The NSW and ACT governments combined with researchers at the University of NSW's Climate Change Research Centre to generate scenarios for 100 square-kilometre grids out to 2030 and 2070 for all of eastern Australia stretching from south-east Queensland down to the east half South Australia.

Burning: The number of extreme fire weather days will likely increase in spring and summer for most of the state. Credit:Wolter Peeters

Under some previous models, Sydney was treated as having the same climate as towns much further inland, such as Bathurst.

"All of our models agree that it will get warmer in NSW," said Matthew Riley, director of climate and atmospheric science for the Office of Environment and Heritage. Cold days will also be fewer, particularly on the Great Dividing Range.