What were the highest and lowest air temperatures (in degrees Fahrenheit) ever recorded in California’s Death Valley?

In 1913, Death Valley saw both its hottest and coldest air temperatures, 134 degrees F (56.7 degrees Celsius) on July 10 at Furnace Creek, and 15 (-9 degrees C) in January (specific date not given) at, appropriately enough, Greenland Ranch.

During a heat wave at Furnace Creek that July, high air temperatures reached at least 129 F (54 C) for five consecutive days. Although some weather-watchers dispute the accuracy of that 134-degree reading, it is widely accepted as the hottest air temperature ever recorded anywhere on Earth.

The highest overnight temperature occurred on July 5, 1918. That reading of 110 F (43 C) holds the world’s record as the hottest daily-low temperature ever reached on the planet, as of 2017.

It is important to specify “air temperature” because the undisputed hottest surface temperature ever recorded was also at Furnace Creek, where people and other denizens of the area had to deal with 201.0 F (93.9 C) of heat under them. This is not only the undisputed surface temperature ever recorded anywhere, but the only surface temperature hotter than 200 F (93.3 C) ever recorded on the planet.