Research: Original analyses of NOAA's climate records
6 analyses computed from the same database as the place pages: 197 of 215 large U.S. places have run warmer than their 1991-2020 normal since 2021, and every state with a record from before 1925 has a fitted warming rate. Each leads with its finding and states its method and limits.
The analyses
- How much warmer U.S. cities have been since 2021197 of 215 large places ran warmer than normal; median +1.3°F.
- Which states are warming fastestAlaska leads at 3.3°F per century.
- Where summers are muggy59 of 138 large cities average a summer dew point of 65°F or more.
- Where the most days are mildOxnard has 320 days a year with highs of 60-79°F.
- How long the frost-free season lasts in each stateHawaii has the longest typical season (365 days).
- How much cooler each 1,000 feet of elevation is1.3°F per 1,000 feet at the same latitude.
Source: NOAA NCEI 1991-2020 normals; NOAA nClimDiv statewide series; station records via ACIS.