[Illustrations, footnotes and references available in PDF version]

In this report, we review New Mexico’s long-term climate history and find little in the way of evidence that greenhouse gas build-up in the atmosphere has altered New Mexico’s climate. Instead of long-term changes, short-term variability dominates the state’s average temperature, precipitation, and drought frequency. Current temperatures are not all that different than the ones observed at the beginning of the last century—100 years ago.