National Weather Service United States Department of Commerce

Extreme Temperature Facts for Phoenix and Yuma

 

 

Phoenix

Period of Record (1896-2018)

Yuma

Period of Record (1878-2018)

Average First 100° F Day May 11 (POR)
May 2 (1981-2010)
Apr 29 (POR)
Apr 22 (1981-2010)
Earliest First 100° F Day 26 Mar 1988 12 Mar 1916
Latest First 100° F Day 18 Jun 1913 13 Jun 1971
Average Last 100° F Day Sep 29 (POR)
Oct 3 (1981-2010)
Oct 4 (POR)
Oct 7 (1981-2010)
Earliest Last 100° F Day 2 Sep 1904 5 Sep 1976
Latest Last 100° F Day 27 Oct 2016 25 Oct 1959
Average number of 100° F or greater days per year 94 (POR)
110 (1981-2010)
109 (POR)
118 (1981-2010)
Fewest number of 100° F or greater days 48 (1913) 80 (1884)
Greatest number of 100° F or greater days 143 (1989) 144 (1952)
Longest stretch of 100° F or greater days 76 (10 Jun 1993 - 24 Aug 1993) 99 (31 May 2006 - 6 Sep 2006)
Average First 110° F Day 18 Jun (POR)
10 Jun (1981-2010)
14 Jun (POR)
10 Jun (1981-2010)
Earliest First 110° F Day 8 May 1989 2 May 1947
Latest First 110° F Day 1911 No 110° F Day 22 Jul 1921
Average Last 110° F Day 11 Aug (POR)
26 Aug (1981-2010)
1 Sep (POR)
7 Sep (1981-2010)
Earliest Last 110° F Day 5 Jun 1912 11 Jul 1904
Latest Last 110° F Day 19 Sep 2010 2 Oct 1980
Average number of 110°F or greater days per year 12 (POR)
19 (1981-2010)
20 (POR)
26 (1981-2010)
Fewest number of 110° F or greater days None (1911) 1 (1904)
Greatest number of 110° F or greater days 33 (2011) 53 (1994)
Longest stretch of 110°F or greater days 18 (12 Jun 1974 - 29 Jun 1974) 18 (24 Jul 1995 - 10 Aug 1995)
Top 5 Hottest Days

1. 122 (26 Jun 1990)
2. 121 (28 Jul 1995)
3. 120 (25 Jun 1990)
4. 119 (20 Jun 2017)
    119 (29 Jun 2013)

1. 124 (28 Jul 1995)
2. 123 (1 Sep 1950)
3. 122 (26 Jun 1990)
4. 120 (20 Jun 2017 and 5 other times)
Average number of 32° F or lower days per year 8 (POR)
1 (1981-2010)
3 (POR)
0 (1981-2010)
Greatest number of 32° F or lower days 35 (1964) 15 (1911)
Top 5 Coldest Days

1. 16 (7 Jan 1913)
2. 17 (6 Jan 1913)
3. 19 (7 Jan 1971)
    19 (8 Jan 1913)
5. 20 (8 Jan 1971 and 2 other times)

1. 22 (24 Jan 1937)
    22 (26 Dec 1950)
    22 (20 Jan 1883)
4. 24 (8 Jan 1971 and 2 other times)