...Fourth longest string of days with a maximum temperature of at
least 90 degrees on record at Philadelphia...
The string of 12 days with a maximum temperature of at least 90
degrees that ran through July 9th of this year tied strings of 12
such days that ran through July 6th, 1901, July 23rd, 1952, and
August 3rd, 1999 for the fourth longest on record. The longest on
record lasted 18 days and ran through August 15th, 1988.
Records date back to 1874.