Based on WGI Interactive Atlas data , global warming is projected to affect terrestrial hotspots less than non- hotspot areas: 80% less for Myers and 95-96% less for G200 terrestrial and freshwater hotspots at global warming of 1.5ºC-3ºC  . In contrast, warming is projected to be 12-13% greater inside than outside marine hotspots  . Precipitation is generally projected to increase more in terrestrial and freshwater biodiversity hotspots compared to outside them  . The exception is Myers hotspots, which are projected to have, on average, ~28% less precipitation at 1.5℃ warming, but ~33% more at 2℃ and ~65% more at 3°℃ . However, precipitation changes are often difficult to assess as many hotspots cover large areas, with some areas projected to be wetter and some drier with wide differences between different climate models.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report