Arizona heat facts

The highest temperature Phoenix has ever endured was 122 degrees back on June 26th, 1990. 

Even more amazing is the fact that our hottest overnight low was 96 degrees on July 15th, 2003.

Phoenix’s longest streak of  temperatures at 110 degrees or hotter was 18 days in 1974.  That streak started on June 12th and ended on June 29th. 

We baked through 76 days in a row of 100 degrees or higher back in 1993.  An astounding 115 days in a row with temperatures above 95 degrees in 1981 and 154 days with our daytime highs reaching 90+ degrees in 1983.

The earliest Phoenix ever hit 110 was on May 8th, 1989 and the earliest we ever hit 100 was the same year on  April 6th.

	Phoenix	Tucson	Flagstaff
Highest Maximum:	122	117	97
Date:	June 26th, 1990	June 26th, 1990	July 5th, 1973
Highest Minimum:	96	89	68
Date:	July 15th, 2003	July 22nd, 2006	July 2nd, 2002
Consecutive Days of 110 or more	18 Days	6 Days	0 Days
Ending Date:	June 29th, 1974	June 29th, 1974	*
Consecutive Days of 100 or more	76 Days	39 Days	0 Days
Ending Date:	Aug. 24th, 1993	July 22nd, 2005	*
Consecutive Days of 95 or more	115 Days	63 Days	2 Days
Ending Date:	Sept. 21st, 1981	Sept. 17, 1924	June 26th, 1970
Consecutive Days of 90 or more	154 Days	126 Days	11 Days
Ending Date:	Oct. 7th, 1983	Oct. 4th, 1924	July 1st, 1990
Earliest 110	May 8th, 1989	May 29th, 1910	*
Earliest 100	March 26th, 1988	April 19th, 1989	*

* Flagstaff has never officially reached 100 degrees