Original: The hottest air temperature ever recorded in Death Valley (Furnace Creek) was 134°F (57°C) on July 10, 1913, also that same year saw Death Valley's coldest temperature, on January 8 the temperature dropped to 67°F (20°C) at Furnace Creek.
Simplified: On July 10, 1913, it was 134°F (57°C), which is the hottest recorded temperature in the United States.