A new interactive map shows which parts of the world have been hardest-hit by climate change, and which will bear the brunt over the next half-century.

ClimateEx was put together by geology professor Tomsz Stepinski and researcher Pawel Netzel, both of the University of Cincinnati.

It uses five decades' worth of weather and climate data collected from 50,000 weather stations around the Earth, including New Zealand. It shows not just how the climate has changed in that time, but also what's expected to happen by the year 2070, based on current trends.

The data includes not just temperatures, but rainfall, which Prof Stepinski says is often forgotten about when it comes to climate change.