The National Climatic Data Center's preliminary July report issued today shows that the Oklahoma July average temperature of 88.9 degrees F (31.6 degrees C) was the highest for any state in history. The Texas July average of 87.1 degrees F (30.6 degrees C) was also the hottest ever for that state. The previous hottest month was July 1954 in Oklahoma at 88.1 degrees F (31.2 degrees C).
Delaware also had its hottest July in history. Top-ten hottest Julys were observed over a wide area from New Mexico and Colorado eastward through the Mississippi Valley, Great Lakes, Southeast, Mid Atlantic, and southern New England.
The only states with below-average temperatures were Washington, Oregon, California, Idaho, and Nevada. It was the 11th coldest July in Washington state.
Nationwide, it was the 4th hottest July in history:
The average U.S. temperature in July was 77.0 degrees F (25.0 degrees C), which is 2.7 degrees F (1.5 degrees C) above the long-term (1901-2000) average, resulting [in] the fourth warmest July and the fourth warmest month on record.