Curious America · Weather records

Hottest day ever recorded by state

California's record is 134°F, observed at Greenland Ranch on July 10, 1913. It is the most extreme all-time high temperature among the state records shown here.

Each state contributes a NOAA-recognized state maximum-temperature observation. These are individual historical observations, not statewide averages, seasonal norms, or a prediction of typical weather.

The three most extreme records

1. 1.California: 134°F, Greenland Ranch — July 10, 1913.
2. 2.Arizona: 128°F, Lake Havasu City — June 29, 1994.
3. 3.Nevada: 125°F, Laughlin — June 29, 1994.

NOAA's State Climate Extremes Committee reviews these state records. The map reflects the committee table reviewed by MoverMath on September 5, 2026; later reviews can revise a record.

Source: NOAA National Centers for Environmental Information, State Climate Extremes Committee records.