United States temperature extremes

For the United States, the extremes are 134 F in Death Valley, California in 1913 and -79.8 F recorded in Prospect Creek, Alaska in 1971.

The largest recorded temperature change in one place over a 24-hour period occurred on January 15, 1972 in Loma, Montana, when the temperature rose from -54 to 49 F.

The most dramatic temperature changes occur in North American climates susceptible to Chinook winds. For example, the largest 2-minute temperature change of 49 F-change occurred in Spearfish, South Dakota, a rise from -4 to 45 F.

Lack of extremes
Among the U.S. states, Hawaii has both the lowest state maximum of 98 F and the highest state minimum of 12.0 F. Tropical ocean island locations such as Hawaii often have the lowest recorded temperature ranges, sometimes with a difference of as little as 62 F-change.