SA modelling shows hotter days, less rain

South Australia is in for hotter days and more of them, less rain but with heavier falls and more severe fire conditions.

The glum outlook is being forecast by the state's department for environment and water based on the likely effects of climate change obtained by modelling different greenhouse gas emission scenarios

The concerning projections indicate increases in maximum, minimum and average temperatures, and a decline in average annual rain despite a greater frequency of extreme falls.

They have been issued as a summary of likely changes in the decades ahead to key variables such as temperature, rainfall, evapotranspiration, days of severe fire danger and sea level rises.

Acting Climate Minister Joe Szakacs says the data will be used by government, business and communities to prepare for change.

"These projections reinforce why the state government declared a climate emergency and why South Australia can't afford to wait any longer on real climate change action," he said on Saturday.

"They further highlight the need to reduce greenhouse gas emissions through our hydrogen jobs plan, which will accelerate SA's renewable energy industry."

The modelling's mid-range scenario is representative of a global temperature increase of between 1.9 degrees and 2.9 degrees by 2100, while a high-range scenario represents a 3.6 to 5.0 degree increase.

Statistical tables for Adelaide and nine regional South Australian towns, along with statewide maps, provide an in-depth analysis on projected climate variables to 2030, 2050 and, for the first time, 2090.

Mr Szakacs said the figures provided the best information available to help plan for the future.

"The time for climate change action is now and it is incumbent upon us all to support businesses and the community to adapt and reduce emissions," he said.

SA Deputy Premier and Climate Minister Susan Close is currently attending the United Nation's COP27 summit in Sharm el-Sheikh, Egypt.