Yesterday's maximum temperature of 94ºF at the Salt Lake City International Airport set a new record for the day. In addition, the only higher maximum temperature record later in the year is 97ºF, set on Sep 19, 1956. Thus, we were in rare but not unprecedented territory for so late in the year.
On a global scale, data released by the National Climatic Data Center shows that August 2014 was the hottest in the instrumented record.
You might recall that August was relatively cool here in Utah and this shows up well below.
Globally for the year to date, 2014 is now the 3rd warmest behind 1998 and 2010.
It will be interesting to see how things play out in the home stretch.