FACTS ABOUT 100 DEGREE
TEMPERATURES FOR PHOENIX

It seems, at times, that 100 degree weather and Phoenix go together like 'mom' and 'apple pie'. However, this is a bit of a misconception, as the mercury stays in double-digits for the bulk of the year. In fact, in 1913, Phoenix only registered 48 days where the mercury hit 100 degrees or higher. Nevertheless, there is a lot of interest by the public and media in 100 degree statistics, especially with regards to the average first 100 degree reading at Sky Harbor. Statistical information concerning 100 degree and hotter temperatures in Phoenix:


The first occurrence of 100 °F or higher annually:
  Earliest - March 26, 1988
  Latest - June 18, 1913
  Average - May 12

The last occurrence of 100 °F or higher:
  Earliest - September 2, 1904
  Latest - October 23, 2003
  Average - September 28

The first occurrence of 110 °F or higher:
  Earliest - May 8, 1989
  Latest - August 9, 1915
  Average - June 19
    Note: In 1911 there were no 110+ °F Days.

The last occurrence of 110 °F or higher:
  Earliest - June 5, 1912
  Latest - September 19, 2010
  Average - August 10
    Note: In 1911 there were no 110+ °F Days.

Average annual number of days with maximum temperatures of 100°F or higher 1896-2010: 92

Average annual number of days with maximum temperatures of 100°F or higher 1981-2010: 110

Least number of days with maximum temperatures of 100°F or higher: 48 in 1913

Most number of days with maximum temperatures of 100°F or higher: 143 in 1989

Greatest number of consecutive days with maximum temperatures of 100°F or higher: 76 in 1993

Average annual number of days with maximum temperatures of 110°F or higher 1896-2010: 11

Average annual number of days with maximum temperatures of 110°F or higher 1981-2010: 19

Least number of days with maximum temperatures of 110°F or higher: 0 in 1911

Most number of days with maximum temperatures of 110°F or higher: 32 in 2007

Greatest number of consecutive days with maximum temperatures of 110°F or higher: 18 in 1974


Highest Temperatures ever recorded in Phoenix

122°F June 26, 1990

121°FJuly 28, 1995

120°FJune 25, 1990

119°FJune 29, 2013

118°F July 2, 2011

Note: Also on these days tied 118°F July 16, 1925, June 24, 1929, July 11, 1958, July 4, 1989,
June 27, 1990,June 28, 1990, July 27, 1995, July 21, 2006.