Joshua Tree National Park conserves 3200 km2 of the Mojave and Sonoran Desert ecosystems. The climate of the national park is arid, with an average summer temperature of 27.3°C + 0.7℃ and average annual precipitation of 170 + 80 mm yr1 in the period 1971-2000 . From 1895 to 2017, the average annual temperature increased at a significant  rate of 1.5°C + 0.1ºC per century and the average annual precipitation decreased at a significant  rate of -32 + 12% per century . Anthropogenic climate change accounts for half the magnitude of a 2000-2020 drought in the southwestern USA, the most severe since the 1500s .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report