Nights at or above 25 C (77 F) in Phoenix

Phoenix has had nights with a minimum temperature at or above 25 C (77 F) in 85 years, most in 2024 with 130. Days per year, season span, streaks and every date.

Key Facts for Phoenix

Phoenix has had nights with a minimum temperature at or above 25 C (77 F) in 85 years, 6,369 days in all.
The most in one year was 130 days in 2024.
In 2026, the latest year on file, there were 125 such days.
The earliest first date in a year was 27 April 1987.
The latest last date in a year was 12 October 1991.
The longest run inside a single year was 109 days in 2024.
9 years with under 90 percent of days observed are left out of these rankings.

Days per Year

85 years, 6,369 days

Days per year in Phoenix with a minimum temperature at or above 25 C (77 F). The line is the decade average. The most was 130 in 2024. Grey bars are years with under 90 percent of days observed, left out of rankings.

Nights at or above 25 C (77 F) per year in Phoenix
Year	Days	Decade average
1934	42	33.5
1938	25	33.5
1941	12	25.8
1942	19	25.8
1943	29	25.8
1944	21	25.8
1948	38	25.8
1949	36	25.8
1950	28	47.1
1951	37	47.1
1952	37	47.1
1953	47	47.1
1954	55	47.1
1955	27	47.1
1956	28	47.1
1957	54	47.1
1958	82	47.1
1959	76	47.1
1960	62	42.2
1961	42	42.2
1962	33	42.2
1963	37	42.2
1964	26	42.2
1965	28	42.2
1966	46	42.2
1967	51	42.2
1968	32	42.2
1969	65	42.2
1970	76	67.8
1971	68	67.8
1972	65	67.8
1973	58	67.8
1974	66	67.8
1975	58	67.8
1976	66	67.8
1977	91	67.8
1978	68	67.8
1979	62	67.8
1980	76	87.3
1981	101	87.3
1982	74	87.3
1983	92	87.3
1984	78	87.3
1985	89	87.3
1986	88	87.3
1987	90	87.3
1988	95	87.3
1989	90	87.3
1990	87	87
1991	92	87
1992	92	87
1993	88	87
1994	88	87
1995	78	87
1996	85	87
1997	98	87
1998	77	87
1999	85	87
2000	110	102.7
2001	114	102.7
2002	102	102.7
2003	107	102.7
2004	88	102.7
2005	100	102.7
2006	98	102.7
2007	111	102.7
2008	99	102.7
2009	98	102.7
2010	102	101.8
2011	99	101.8
2012	99	101.8
2013	107	101.8
2014	109	101.8
2015	110	101.8
2016	94	101.8
2017	97	101.8
2018	107	101.8
2019	94	101.8
2020	109	112.6
2021	92	112.6
2022	114	112.6
2023	103	112.6
2024	130	112.6
2025	115	112.6
2026	125	112.6

Season Span

earliest 27 April, latest 12 October

For each year, a bar from the first to the last day in Phoenix meeting 25 C (77 F). Long bars mean a long season.

First to last qualifying date each year in Phoenix
Year	First date	Last date
1934	1934-05-11	1934-09-07
1938	1938-06-27	1938-08-30
1941	1941-07-07	1941-08-06
1942	1942-07-01	1942-08-21
1943	1943-06-27	1943-08-28
1944	1944-06-30	1944-09-07
1948	1948-06-30	1948-09-18
1949	1949-06-22	1949-09-08
1950	1950-06-29	1950-09-05
1951	1951-06-20	1951-08-23
1952	1952-07-04	1952-09-24
1953	1953-06-11	1953-08-26
1954	1954-06-21	1954-09-22
1955	1955-06-10	1955-09-07
1956	1956-06-12	1956-09-09
1957	1957-06-04	1957-09-09
1958	1958-05-30	1958-09-22
1959	1959-06-13	1959-09-12
1960	1960-06-16	1960-09-14
1961	1961-06-16	1961-08-21
1962	1962-06-29	1962-09-19
1963	1963-07-03	1963-09-12
1964	1964-06-26	1964-08-25
1965	1965-07-06	1965-09-02
1966	1966-06-15	1966-08-28
1967	1967-06-25	1967-09-22
1968	1968-07-03	1968-09-14
1969	1969-07-02	1969-09-10
1970	1970-06-01	1970-09-13
1971	1971-06-18	1971-09-17
1972	1972-06-02	1972-09-18
1973	1973-06-21	1973-09-06
1974	1974-06-15	1974-09-10
1975	1975-06-07	1975-09-19
1976	1976-06-17	1976-09-10
1977	1977-06-01	1977-10-04
1978	1978-06-10	1978-10-01
1979	1979-06-10	1979-09-26
1980	1980-06-18	1980-09-28
1981	1981-05-31	1981-09-22
1982	1982-06-17	1982-09-26
1983	1983-05-25	1983-09-20
1984	1984-05-14	1984-09-21
1985	1985-05-03	1985-10-05
1986	1986-05-29	1986-09-10
1987	1987-04-27	1987-10-03
1988	1988-05-12	1988-10-05
1989	1989-05-09	1989-09-29
1990	1990-05-23	1990-09-23
1991	1991-06-09	1991-10-12
1992	1992-05-31	1992-10-01
1993	1993-05-12	1993-10-05
1994	1994-05-31	1994-09-20
1995	1995-06-13	1995-09-22
1996	1996-06-04	1996-10-06
1997	1997-05-10	1997-10-03
1998	1998-06-21	1998-09-19
1999	1999-05-25	1999-09-23
2000	2000-05-23	2000-10-03
2001	2001-05-12	2001-10-03
2002	2002-05-31	2002-09-26
2003	2003-05-18	2003-10-07
2004	2004-06-02	2004-09-17
2005	2005-05-21	2005-10-08
2006	2006-05-17	2006-10-05
2007	2007-05-17	2007-10-04
2008	2008-05-20	2008-10-01
2009	2009-05-17	2009-09-30
2010	2010-06-05	2010-10-02
2011	2011-05-28	2011-10-03
2012	2012-05-15	2012-09-24
2013	2013-05-14	2013-09-21
2014	2014-05-25	2014-09-26
2015	2015-05-31	2015-10-01
2016	2016-06-01	2016-09-20
2017	2017-05-23	2017-09-17
2018	2018-05-07	2018-09-29
2019	2019-06-06	2019-09-19
2020	2020-05-09	2020-09-30
2021	2021-06-01	2021-09-24
2022	2022-05-26	2022-10-03
2023	2023-05-15	2023-10-09
2024	2024-05-18	2024-10-11
2025	2025-05-10	2025-10-03
2026	2026-05-03	2026-10-09

Every Year

Nights at or above 25 C (77 F) per year in Phoenix
Year	Days	First date	Last date	Longest streak in year	Coverage
2026	125	3 May 2026	9 October 2026	60 days	Incomplete, not ranked
2025	115	10 May 2025	3 October 2025	71 days	Complete
2024	130	18 May 2024	11 October 2024	109 days	Complete
2023	103	15 May 2023	9 October 2023	67 days	Complete
2022	114	26 May 2022	3 October 2022	44 days	Complete
2021	92	1 June 2021	24 September 2021	40 days	Complete
2020	109	9 May 2020	30 September 2020	69 days	Complete
2019	94	6 June 2019	19 September 2019	47 days	Complete
2018	107	7 May 2018	29 September 2018	29 days	Complete
2017	97	23 May 2017	17 September 2017	33 days	Complete
2016	94	1 June 2016	20 September 2016	47 days	Complete
2015	110	31 May 2015	1 October 2015	40 days	Complete
2014	109	25 May 2014	26 September 2014	54 days	Complete
2013	107	14 May 2013	21 September 2013	32 days	Complete
2012	99	15 May 2012	24 September 2012	32 days	Complete
2011	99	28 May 2011	3 October 2011	49 days	Complete
2010	102	5 June 2010	2 October 2010	39 days	Complete
2009	98	17 May 2009	30 September 2009	30 days	Complete
2008	99	20 May 2008	1 October 2008	26 days	Complete
2007	111	17 May 2007	4 October 2007	73 days	Complete
2006	98	17 May 2006	5 October 2006	24 days	Complete
2005	100	21 May 2005	8 October 2005	43 days	Complete
2004	88	2 June 2004	17 September 2004	38 days	Complete
2003	107	18 May 2003	7 October 2003	33 days	Complete
2002	102	31 May 2002	26 September 2002	44 days	Complete
2001	114	12 May 2001	3 October 2001	29 days	Complete
2000	110	23 May 2000	3 October 2000	40 days	Complete
1999	85	25 May 1999	23 September 1999	23 days	Complete
1998	77	21 June 1998	19 September 1998	23 days	Complete
1997	98	10 May 1997	3 October 1997	20 days	Complete
1996	85	4 June 1996	6 October 1996	37 days	Complete
1995	78	13 June 1995	22 September 1995	21 days	Complete
1994	88	31 May 1994	20 September 1994	44 days	Complete
1993	88	12 May 1993	5 October 1993	52 days	Complete
1992	92	31 May 1992	1 October 1992	16 days	Complete
1991	92	9 June 1991	12 October 1991	24 days	Complete
1990	87	23 May 1990	23 September 1990	27 days	Complete
1989	90	9 May 1989	29 September 1989	32 days	Complete
1988	95	12 May 1988	5 October 1988	44 days	Complete
1987	90	27 April 1987	3 October 1987	14 days	Complete
1986	88	29 May 1986	10 September 1986	33 days	Complete
1985	89	3 May 1985	5 October 1985	26 days	Complete
1984	78	14 May 1984	21 September 1984	18 days	Complete
1983	92	25 May 1983	20 September 1983	44 days	Complete
1982	74	17 June 1982	26 September 1982	35 days	Complete
1981	101	31 May 1981	22 September 1981	57 days	Complete
1980	76	18 June 1980	28 September 1980	35 days	Complete
1979	62	10 June 1979	26 September 1979	30 days	Complete
1978	68	10 June 1978	1 October 1978	24 days	Complete
1977	91	1 June 1977	4 October 1977	79 days	Complete
1976	66	17 June 1976	10 September 1976	26 days	Complete
1975	58	7 June 1975	19 September 1975	43 days	Complete
1974	66	15 June 1974	10 September 1974	18 days	Complete
1973	58	21 June 1973	6 September 1973	23 days	Complete
1972	65	2 June 1972	18 September 1972	18 days	Complete
1971	68	18 June 1971	17 September 1971	31 days	Complete
1970	76	1 June 1970	13 September 1970	33 days	Complete
1969	65	2 July 1969	10 September 1969	26 days	Complete
1968	32	3 July 1968	14 September 1968	9 days	Complete
1967	51	25 June 1967	22 September 1967	19 days	Complete
1966	46	15 June 1966	28 August 1966	14 days	Complete
1965	28	6 July 1965	2 September 1965	7 days	Complete
1964	26	26 June 1964	25 August 1964	6 days	Complete
1963	37	3 July 1963	12 September 1963	14 days	Complete
1962	33	29 June 1962	19 September 1962	8 days	Complete
1961	42	16 June 1961	21 August 1961	15 days	Complete
1960	62	16 June 1960	14 September 1960	16 days	Complete
1959	76	13 June 1959	12 September 1959	34 days	Complete
1958	82	30 May 1958	22 September 1958	44 days	Complete
1957	54	4 June 1957	9 September 1957	15 days	Complete
1956	28	12 June 1956	9 September 1956	10 days	Complete
1955	27	10 June 1955	7 September 1955	5 days	Complete
1954	55	21 June 1954	22 September 1954	12 days	Complete
1953	47	11 June 1953	26 August 1953	16 days	Complete
1952	37	4 July 1952	24 September 1952	7 days	Complete
1951	37	20 June 1951	23 August 1951	8 days	Complete
1950	28	29 June 1950	5 September 1950	9 days	Complete
1949	36	22 June 1949	8 September 1949	10 days	Complete
1948	38	30 June 1948	18 September 1948	9 days	Complete
1944	21	30 June 1944	7 September 1944	5 days	Complete
1943	29	27 June 1943	28 August 1943	5 days	Complete
1942	19	1 July 1942	21 August 1942	6 days	Complete
1941	12	7 July 1941	6 August 1941	4 days	Complete
1938	25	27 June 1938	30 August 1938	10 days	Complete
1934	42	11 May 1934	7 September 1934	14 days	Complete

Decade averages for Nights at or above 25 C (77 F) in Phoenix
Decade	Average days per year	Years counted
1930s	33.5	2
1940s	25.8	6
1950s	47.1	10
1960s	42.2	10
1970s	67.8	10
1980s	87.3	10
1990s	87.0	10
2000s	102.7	10
2010s	101.8	10
2020s	110.5	6

Compare with your own threshold in the threshold explorer. Fahrenheit thresholds are converted to tenths of a degree Celsius once, rounding half up.

Download the Data

Data for Nights at or above 25 C (77 F) in Phoenix, by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site from the threaded city record.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).