Fastest-Warming U.S. States and Cities | Climate Central
www.climatecentral.org
All 50 states and 99% of 242 major U.S. cities analyzed have warmed since the first Earth Day in 1970.

Climate Central analyzed average annual temperature trends since 1970 in 49 states and 242 U.S. cities to understand how temperatures across the country have changed as heat-trapping pollution has continued to climb.

The fastest-warming U.S. states from 1970 to 2025 are:

  • Alaska
  • New Jersey
  • New Mexico
  • Delaware
  • Massachusetts
  • Vermont

The fastest-warming U.S. cities are:

  • Reno, NV
  • Las Vegas, NV
  • El Paso, TX
  • Burlington, VT
  • Tyler, TX

This Climate Matters analysis is based on open-access data from the National Oceanic and Atmospheric Administration (NOAA). See Methodology for details.