Flagstaff, AZ: September

30 September 2026: September 2026 averaged 60.8°F in Flagstaff, AZ, the warmest September since 2024, 6th warmest of 128.

September 2026

Mean temperature: 60.8°F; Warmest since 2024; 6th warmest of 128
Precipitation: 3.50 in; Wettest since 2002; 20th wettest of 128

A normal September in Flagstaff, AZ (1991 to 2020): a mean temperature of 58.8°F, between 56.1°F and 60°F in eight years of ten and 1.42 in of precipitation, between 0.26 in and 3.76 in in eight years of ten.

The mean temperature of every September in Flagstaff, AZ since 1899: 60.8°F in 2026; the highest is 62.1°F, in 1947.

Normal range, 56.1 to 60°F

Every year, ranked, as a table

Every September in Flagstaff, AZ from 1898 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2026	60.8	6	74	56	47.6	1	3.50	20	0
2025	58.8	43	73.3	70	44.3	20	1.90	44	1
2024	60.9	5	78.7	4	43.1	39	0.29	108	0
2023	58.9	40	75	45	42.7	50	0.29	108	0
2022	61.8	3	76.5	23	47	2	1.35	65	0
2021	60.2	16	74.7	47	45.6	7	1.13	75	0
2020	60	21	78.8	3	41.2	81	trace	124	0
2019	59.2	35	73.8	58	44.7	17	0.95	84	0
2018	59.9	22	76.5	23	43.2	36	1.30	68	0
2017	56.8	89	72.5	84	41	85	0.42	105	0
2016	56.8	89	71.1	97	42.5	58	1.54	57	0
2015	60.4	13	75.3	40	45.4	10	1.25	70	0
2014	59.5	30	73.5	66	45.5	8	3.10	28	0
2013	57.1	83	71.4	93	42.7	50	3.25	25	0
2012	58.9	40	74.5	51	43.3	35	0.26	111	0
2011	58.8	43	74.6	49	43.1	39	3.36	24	0
2010	60.2	16	78	7	42.3	61	0.79	90	0
2009	59	38	74.4	52	43.6	29	0.77	93	0
2008	58.5	53	75.3	40	41.6	76	0.69	95	0
2007	57.7	71	72.8	79	42.6	54	2.90	29	0
2006	54.4	119	69.6	114	39.1	110	1.24	71	0
2005	57.3	79	73.1	74	41.5	77	0.46	103	0
2004	55.9	100	71.6	91	40.2	96	1.76	50	0
2003	59.1	37	75.2	44	43	43	2.62	33	0
2002	58.1	60	73	77	43.2	36	4.01	14	0
2001	59.8	23	78.4	5	41.3	79	0.68	96	0
2000	60.1	19	77.3	12	42.9	44	0.36	106	0
1999	56.1	99	71.4	93	40.8	88	4.54	9	0
1998	57.3	79	70.6	102	43.9	24	4.45	11	0
1997	59.4	31	72.8	79	46	6	3.68	17	0
1996	55.1	111	68.9	121	41.3	79	3.73	16	0
1995	58.9	40	75.3	40	42.5	58	1.58	55	2
1994	58.1	60	73.8	58	42.3	61	2.75	32	0
1993	57.9	63	76.3	27	39.5	106	1.95	42	0
1992	59.3	33	77.4	11	41.2	81	trace	124	0
1991	59.6	29	76.4	26	42.8	47	0.26	111	0
1990	59.8	23	74.4	52	45.2	11	6.18	3	0
1989	58.6	50	76.8	17	40.5	94	0.30	107	0
1988	55.9	100	73.1	74	38.7	116	0.15	116	0
1987	56.5	96	73.5	66	39.5	106	1.49	62	0
1986	53	125	66.9	128	39	111	4.80	5	0
1985	53.1	124	68.8	122	37.3	125	3.68	17	0
1984	59.3	33	75	45	43.5	32	1.75	51	0
1983	60.7	7	75.9	32	45.5	8	6.75	1	0
1982	57.6	75	72.5	84	42.7	50	3.17	26	0
1981	58.7	46	72.8	79	44.5	19	2.54	34	0
1980	59.7	26	76.2	30	43.2	36	0.65	97	0
1979	58.8	43	76.7	19	40.9	87	0.13	119	0
1978	57.2	82	73.5	66	41	85	0.46	103	0
1977	60.2	16	76.3	27	44	22	1.52	61	0
1976	57.1	83	72.3	87	41.8	69	1.16	74	0
1975	57.8	67	73.1	74	42.6	54	1.89	45	0
1974	58.6	50	75.5	37	41.8	69	0.93	85	0
1973	57.7	71	77.2	13	38.1	121	trace	124	0
1972	56.7	91	73.3	70	40	100	0.81	88	0
1971	53	125	69.4	118	36.6	127	2.02	41	0
1970	54.4	119	69.8	112	39	111	3.79	15	0
1969	58.2	57	74.4	52	41.9	67	1.34	66	0
1968	55.9	100	73.9	57	37.8	123	0.04	122	0
1967	57.9	63	72.8	79	42.9	44	2.25	36	0
1966	58.6	50	73.6	64	43.6	29	2.03	40	0
1965	53.8	121	67.9	127	39.7	104	4.85	4	0
1964	56.7	91	72.2	88	41.2	81	0.99	81	0
1963	59.2	35	75.5	37	42.8	47	0.79	90	0
1962	58.7	46	74.4	52	42.9	44	2.48	35	0
1961	53.8	121	69.6	114	37.9	122	1.92	43	0
1960	59.7	26	75.5	37	43.8	27	1.18	72	0
1959	56.3	97	72	89	40.7	90	0.28	110	0
1958	57	85	71.4	93	42.6	54	6.60	2	0
1957	57.3	79	76.5	23	38.2	120	trace	124	0
1956	61.5	4	80.5	1	42.5	58	0.02	123	0
1955	57.6	75	76.3	27	38.8	114	trace	124	0
1954	57.8	67	73.7	60	41.8	69	3.14	27	0
1953	57.7	71	77.6	10	37.8	123	0.12	120	0
1952	58.3	56	74.7	47	41.9	67	2.09	37	0
1951	57.9	63	76.8	17	39	111	0.60	101	0
1950	54.7	116	71	99	38.4	118	0.89	86	0
1949	60.7	7	76.6	21	44.9	13	3.47	21	0
1948	60.3	15	78	7	42.6	54	1.05	78	0
1947	62.1	1	79.6	2	44.6	18	0.64	100	0
1946	60.5	10	76.7	19	44.2	21	1.53	59	0
1945	60.7	7	77.7	9	43.7	28	0.18	114	0
1944	60.4	13	75.9	32	44.9	13	1.33	67	0
1943	60.5	10	77.1	15	43.9	24	1.67	53	0
1942	58.7	46	75.9	32	41.8	69	0.65	97	3
1941	54.7	116	69.7	113	39.8	101	4.54	9	0
1940	57.6	75	70.2	108	45	12	3.63	19	0
1939	58.2	57	70.2	108	46.1	4	3.47	21	0
1938	59.8	23	75.9	32	43.6	29	0.97	83	0
1937	60.5	10	77	16	44	22	1.83	47	0
1936	55.8	104	70.1	110	41.5	77	1.41	63	0
1935	58.4	55	73.7	60	43.1	39	1.01	80	0
1934	57	85	73.7	60	40.2	96	0.26	111	0
1933	61.9	2	77.2	13	46.6	3	1.12	76	0
1932	57.9	63	76	31	39.8	101	1.53	59	0
1931	58.5	53	72	89	44.9	13	2.08	38	0
1930	55.8	104	70.8	101	40.7	90	2.06	39	0
1929	58.7	46	71.4	93	46.1	4	0.74	94	0
1928	59.7	26	76.6	21	42.8	47	0.17	115	0
1927	56.2	98	69	120	43.4	33	4.62	8	0
1926	58.2	57	73.7	60	42.7	50	1.26	69	0
1925	54.9	112	69.3	119	40.6	93	4.65	7	0
1924	56.9	87	73	77	40.7	90	2.77	30	0
1923	53.4	123	68.1	125	38.7	116	3.37	23	0
1922	59.4	31	75.3	40	43.4	33	1.56	56	0
1921	57.7	71	73.4	69	42	66	0.83	87	0
1920	55.4	107	71.1	97	39.7	104	0.79	90	0
1919	56.9	87	69.9	111	43.9	24	1.54	57	0
1918	56.6	95	73.2	72	40.1	99	1.04	79	0
1917	57.8	67	73.2	72	42.3	61	1.78	48	0
1916	55.4	107	70.6	102	40.2	96	1.78	48	0
1915	54.5	118	70.6	102	38.4	118	0.65	97	0
1914	58	62	72.8	79	43.1	39	0.56	102	0
1913	54.8	115	68.8	122	40.8	88	1.89	45	0
1912	52.3	128	69.5	117	35.1	128	0.08	121	0
1911	57.8	67	70.6	102	44.9	13	4.41	12	0
1910	59	38	75.8	36	42.2	64	0.81	88	0
1909	55.6	106	69.6	114	41.7	75	1.74	52	0
1908	55.4	107	70.9	100	39.8	101	0.99	81	0
1907	55.9	100	72.4	86	39.4	109	1.17	73	0
1906	54.9	112	70.3	106	39.5	106	1.67	53	0
1905	56.7	91	71.5	92	41.8	69	4.23	13	0
1904	55.4	107	70.3	106	40.5	94	1.39	64	0
1903	54.9	112	68	126	41.8	69	4.68	6	0
1902	57.4	78	73.6	64	41.2	81	1.12	76	0
1901	56.7	91	74.6	49	38.8	114	0.15	116	0
1900	52.8	127	68.8	122	36.8	126	2.77	30	0
1899	60.1	19	78.1	6	42.1	65	0.14	118	0
1898									10

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1947	62.1
1933	61.9
2022	61.8
1956	61.5
2024	60.9
2026	60.8
1983	60.7
1949	60.7
1945	60.7
1946	60.5
More years share the last value

Coldest
Year	Mean, °F
1912	52.3
1900	52.8
1986	53
1971	53
1985	53.1
1923	53.4
1965	53.8
1961	53.8
2006	54.4
1970	54.4

Wettest
Year	Precipitation, in
1983	6.75
1958	6.60
1990	6.18
1965	4.85
1986	4.80
1903	4.68
1925	4.65
1927	4.62
1999	4.54
1941	4.54

Driest
Year	Precipitation, in
2020	trace
1992	trace
1973	trace
1957	trace
1955	trace
1956	0.02
1968	0.04
1912	0.08
1953	0.12
1979	0.13

The hottest, coldest and wettest days

Hottest day: 86°F; 10 September 2026
Coldest night: 39°F; 25 September 2026, 20 September 2026
Wettest day: 1.65 in; 29 September 2026

Every month, season and year

Months

Seasons

Years

Flagstaff, AZ the day's answers

All-time records

Every answer in words

September 2026 brought 3.50 in of precipitation in Flagstaff, AZ, the wettest September since 2002, 20th wettest of 128.
The hottest day of September 2026 in Flagstaff, AZ: 86°F on Thursday 10 September 2026.
The coldest night of September 2026 in Flagstaff, AZ: a low of 39°F on Friday 25 September 2026 and Sunday 20 September 2026.
The wettest day of September 2026 in Flagstaff, AZ: 1.65 in on Tuesday 29 September 2026.