This publication provides an analysis of how climate change boosted temperatures worldwide between December 2023 and February 2024. Primarily by burning coal, oil, and natural gas, humans have raised the temperature of the planet. Scientists report that the average temperature in 2023 was 1.5 degrees Celsius warmer than early-industrial levels (1850-1900). The purpose of this report is to document what this rise in global temperatures means for people around the world.