a) 134°F

The hottest recorded temperature in the U.S. at Furnace Creek Ranch in Death Valley, California, is 134°F (56.7°C). This record-setting temperature was recorded on July 10, 1913. Death Valley is known for its extreme heat, especially during the summer months, and holds the record for the highest air temperature ever recorded on Earth. The valley’s below-sea-level elevation, clear skies, and low humidity contribute to its scorching temperatures, making it one of the hottest places on the planet.