Hot June = Hot July?

With the final numbers in for June of 2012, there are a few historical expectations we can draw. Detroit was #9 for hottest Junes this year. It also tied for 5th for number of 90-degree days with 9. In the past, any June that had 9 or more 90 degree days followed with a July in the double-digits. The one exception was in 2005 when we only recorded 6. The current and forecasted upper air pattern certainly supports this farmers almanac-esque prediction for the first week of July to have many 90 degree days. See the chart below for historical figures.

Detroit 90-degree days

Year June 90F+ July 90F+
1933 11 10
1934 13 14
1952 10 13
1988 11 12
2005 9 6
2012 9 ??

The average number of 90 degree days for June is 2.5 and July is 4.6 according to temperature records that go back to 1874.

Return to News Archive is the U.S. government's official web portal to all federal, state and local government web resources and services.