FACTS ABOUT 100 DEGREE
TEMPERATURES AT PHOENIX
Updated: 20 August 2011
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 of higher 1896-2010: 92
Average annual number of days with maximum temperatures of 100 °F of 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 or higher: 76 in 1993
Average annual number of days with maximum temperatures of 110 of higher 1896-2010: 11
Average annual number of days with maximum temperatures of 110 of higher 1981-2010: 19
Least number of days with maximum temperatures of 110 or higher: 0 in 1911
Most number of days with maximum temperatures of 110 or higher: 32 in 2007
Greatest number of consecutive days with maximum temperatures of 110 or higher: 18 in 1974
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