The average temperature in Death Valley in July 2017 was a suffocating 107.4 degrees.
It was the hottest month ever recorded in the United States as well as in the world.
The temperature didn’t fall below 89 degrees at any point in the month of July at Death Valley. On three nights, the “low” temperature was 102-103°F degrees:
It seems that King Khalid Military City in Saudi Arabia had a hotter month in August 2014, during which the city’s average temperature was 107.44°F (41.91°C).
But, a climatologist found the weather station in King Khaled was only recording temperature between 9 a.m. and 9 p.m. local time, so not at night, when it’s cooler. This new evidence shows the value from King Khaled to have been in error. Thus the Death Valley figure from July 2017 is the warmest single month (average monthly temperature) reliably measured to date in the world.
Also note that many cities in the West and in the Southeast US had their hottest month on record in July:
Salt Lake City: 85.3 degrees > 84.1 degrees in July 2013
Reno: 80.5 degrees = July 2014
Tonopah: 78.9 degrees > 78.6 degrees in July 1931
Ely: 71.8 degrees > 71.6 degrees in July 2003
Bishop: 80.8 degrees > 80.6 degrees in July 2005
Miami: 85.7 degrees > 85.5 degrees in June 2010
Strange heat anomalies across the US!