Denver, CO: September

30 September 2026: September 2026 averaged 69.2°F in Denver, CO, the warmest September since 2024, 4th warmest of 155.

September 2026

Mean temperature: 69.2°F; Warmest since 2024; 4th warmest of 155
Precipitation: 2.23 in; Wettest since 2013; 22nd wettest of 155

A normal September in Denver, CO (1991 to 2020): a mean temperature of 64.9°F, between 60.5°F and 67.8°F in eight years of ten and 0.87 in of precipitation, between 0.11 in and 2.30 in in eight years of ten.

The mean temperature of every September in Denver, CO since 1872: 69.2°F in 2026; the highest is 70°F, in 2024.

Normal range, 60.5 to 67.8°F

Every year, ranked, as a table

Every September in Denver, CO from 1872 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
2026	69.2	4	82.2	15	56.3	1	2.23	22
2025	64.7	54	78	65	51.4	33	1.76	32
2024	70	1	85.5	1	54.5	7	1.24	51
2023	68	10	83.7	7	52.3	23	0.67	91
2022	69	5	84.3	5	53.6	12	1.25	49
2021	68.8	6	83.9	6	53.6	12	0.28	119
2020	65.4	38	80.7	29	50.2	58	0.93	70
2019	69.3	3	85.5	1	53.2	16	0.41	113
2018	67.8	12	82.7	12	52.8	17	0.18	134
2017	65.1	43	79	47	51.3	35	1.26	48
2016	66	28	82.3	13	49.7	67	0.28	119
2015	69.4	2	85.2	3	53.5	14	0.11	138
2014	64.8	51	78.9	50	50.6	46	1.79	30
2013	66.4	22	78.6	55	54.2	9	5.61	1
2012	66.3	23	80.3	36	52.3	23	2.95	6
2011	64.2	61	78.6	55	49.9	63	0.89	72
2010	67	17	84.8	4	49.1	83	0.06	146
2009	63.5	75	78	65	48.9	87	0.74	85
2008	61.8	106	76	100	47.5	113	1.04	59
2007	65.1	43	80.1	38	50	61	0.54	101
2006	58.9	148	73.2	144	44.6	145	0.84	78
2005	67.2	15	83.2	9	51.1	37	0.07	143
2004	62.7	86	77.6	75	47.7	112	1.99	26
2003	59.3	145	74.4	129	44.2	148	0.26	125
2002	63.6	72	77.4	78	49.8	65	0.58	97
2001	66.8	20	81.5	18	52	26	1.00	61
2000	63.6	72	78.5	59	48.6	93	1.52	40
1999	59.2	147	72.6	146	45.8	136	1.20	54
1998	68	10	83.6	8	52.4	22	0.73	87
1997	64.2	61	78.1	63	50.4	52	0.97	67
1996	60.8	124	74.6	124	46.9	121	2.34	18
1995	61.7	109	74.8	120	48.6	93	2.28	21
1994	67.2	15	82.8	11	51.5	32	0.45	109
1993	60.6	131	74.9	118	46.3	132	2.29	20
1992	65.2	40	81.4	20	49	85	0.01	152
1991	62.5	91	77	85	47.9	103	0.79	81
1990	66.9	19	81	25	52.8	17	1.46	43
1989	62.4	95	76.5	91	48.4	97	1.55	38
1988	62.3	100	77.7	74	46.8	124	0.90	71
1987	62.4	95	76.8	88	47.9	103	0.70	89
1986	60.6	131	74.6	124	46.7	127	0.43	111
1985	58.8	150	71.5	150	46.1	133	2.33	19
1984	60.7	128	74.1	136	47.2	117	0.47	108
1983	64.9	49	81	25	48.8	90	0.13	136
1982	61.7	109	73.9	137	49.5	73	1.38	45
1981	68.2	8	82.1	16	54.2	9	0.35	118
1980	65.8	33	80.7	29	50.8	42	0.63	92
1979	66.3	23	80.7	29	51.8	27	0.36	117
1978	65	46	81.2	22	48.7	92	0.07	143
1977	66.6	21	82.3	13	50.8	42	0.10	141
1976	61.8	106	74.3	132	49.2	79	1.88	27
1975	59.5	142	75.3	113	43.7	150	0.24	126
1974	59.4	144	74.6	124	44.2	148	0.98	64
1973	59.9	140	74.3	132	45.5	140	2.85	10
1972	62.1	101	76	100	48.1	98	2.07	23
1971	57.5	152	72.5	147	42.4	154	2.85	10
1970	59.5	142	75.3	113	43.7	150	2.47	16
1969	64.4	56	79	47	49.9	63	1.67	34
1968	60.8	124	76.6	90	45.1	142	0.59	96
1967	62.1	101	77.5	77	46.7	127	0.60	93
1966	65	46	79.3	45	50.6	46	1.15	56
1965	55.6	154	68.1	154	43.2	152	2.58	15
1964	62.5	91	78.9	50	46.1	133	0.41	113
1963	65.9	31	81.7	17	50.1	59	1.25	49
1962	62.4	95	79.2	46	45.6	138	0.19	133
1961	56.3	153	69.4	152	43.2	152	4.67	2
1960	65	46	80.8	28	49.2	79	0.38	115
1959	61.1	120	74.8	120	47.4	115	1.82	28
1958	64.4	56	78.7	52	50	61	1.51	41
1957	61.4	115	75.9	105	46.8	124	0.42	112
1956	65.5	37	81.3	21	49.7	67	0.01	152
1955	63.8	68	77.9	69	49.8	65	2.72	12
1954	65.7	34	79.6	43	51.8	27	0.77	82
1953	66	28	81.5	18	50.5	48	0.20	131
1952	65.6	35	80.7	29	50.4	52	0.54	101
1951	61.4	115	76.5	91	46.4	130	0.97	67
1950	60.5	135	73	145	48	101	1.58	36
1949	64	66	77	85	50.9	41	0.08	142
1948	68.3	7	81.1	23	55.5	2	0.27	123
1947	67.6	14	80.5	35	54.6	6	0.54	101
1946	64.3	58	77.2	81	51.4	33	0.88	75
1945	60.8	124	73.6	141	47.9	103	0.86	77
1944	64.2	61	78	65	50.3	56	trace	154
1943	63.1	80	77.1	83	49.2	79	0.21	129
1942	61.3	118	74.4	129	48.1	98	0.69	90
1941	61.7	109	73.7	140	49.7	67	2.04	24
1940	65.2	40	74.8	120	55.5	2	2.47	16
1939	67	17	80.1	38	53.9	11	0.48	107
1938	65.4	38	76.4	93	54.3	8	3.42	5
1937	66.1	27	78.7	52	53.5	14	0.56	99
1936	63.8	68	75.9	105	51.8	27	2.89	7
1935	63.3	76	75	116	51.6	31	1.60	35
1934	60.7	128	75	116	46.4	130	0.50	105
1933	67.7	13	80.6	34	54.8	5	1.17	55
1932	63.6	72	76.2	95	51	40	0.11	138
1931	68.2	8	81.1	23	55.3	4	0.22	127
1930	63.8	68	76.4	93	51.1	37	0.27	123
1929	58.9	148	69.6	151	48.1	98	1.34	46
1928	62.7	86	76	100	49.3	77	0.07	143
1927	62	105	73.5	142	50.4	52	1.06	58
1926	61.6	114	74.4	129	48.9	87	1.48	42
1925	63.8	68	75.4	112	52.2	25	0.99	63
1924	60.5	135	73.4	143	47.5	113	1.44	44
1923	60.6	131	72	148	49.3	77	0.75	83
1922	65.9	31	79	47	52.7	19	0.54	101
1921	63.9	67	78.6	55	49.2	79	0.02	150
1920	62.5	91	75.7	108	49.4	75	0.06	146
1919	64.3	58	76	100	52.7	19	1.04	59
1918	58.1	151	69.3	153	46.9	121	2.89	7
1917	64.8	51	78.3	62	51.2	36	0.60	93
1916	61.4	115	75.5	110	47.4	115	0.80	79
1915	61.7	109	74.6	124	48.8	90	1.68	33
1914	64.8	51	80.1	38	49.4	75	0.21	129
1913	59.3	145	71.8	149	46.7	127	2.64	14
1912	54.7	155	67.6	155	41.7	155	2.01	25
1911	66.2	26	80.7	29	51.7	30	0.75	83
1910	64.3	58	78.1	63	50.5	48	1.00	61
1909	61.2	119	73.8	139	48.6	93	3.78	3
1908	65.1	43	79.7	42	50.4	52	0.80	79
1907	63	82	77.4	78	48.5	96	0.74	85
1906	62.1	101	74.6	124	49.6	70	2.72	12
1905	65.2	40	79.5	44	50.8	42	0.49	106
1904	63.1	80	77.3	80	48.9	87	1.77	31
1903	60.7	128	74.2	135	47.1	119	0.56	99
1902	61	123	75.9	105	46	135	3.70	4
1901	62.7	86	78.4	61	47	120	0.22	127
1900	61.7	109	75.6	109	47.8	108	0.87	76
1899	64.9	49	80.3	36	49.6	70	0.20	131
1898	61.8	106	78.5	59	45.1	142	0.28	119
1897	66.3	23	80.1	38	52.5	21	0.44	110
1896	61.1	120	74.3	132	47.9	103	1.81	29
1895	65.6	35	80.9	27	50.3	56	0.98	64
1894	62.6	90	76.1	98	49.1	83	1.55	38
1893	63.3	76	78.7	52	48	101	0.05	149
1892	66	28	82.9	10	49	85	trace	154
1891	64.2	61	77.6	75	50.8	42	0.73	87
1890	62.5	91	77.8	71	47.2	117	0.17	135
1889	59.9	140	74.9	118	45	144	0.28	119
1888	62.8	84	78.6	55	46.9	121	0.11	138
1887	63.3	76	77.1	83	49.6	70	0.97	67
1886	60.4	137	75.1	115	45.6	138	0.98	64
1885	62.7	86	76	100	49.5	73	1.22	53
1884	64.5	55	77.8	71	51.1	37	0.13	136
1883	62.4	95	74.7	123	50.1	59	1.08	57
1882	63.3	76	76.2	95	50.5	48	0.06	146
1881	60.4	137	73.9	137	46.8	124	0.57	98
1880	62.1	101	76.2	95	47.9	103	0.89	72
1879	62.9	83	78	65	47.8	108	0.02	150
1878	60.6	131	75.5	110	45.7	137	1.23	52
1877	62.8	84	77.9	69	47.8	108	0.38	115
1876	62.4	95	76.9	87	47.8	108	0.60	93
1875	64.1	65	77.8	71	50.5	48	2.89	7
1874	60.8	124	77.2	81	44.4	146	1.34	46
1873	61.1	120	76.8	88	45.3	141	0.89	72
1872	60.3	139	76.1	98	44.4	146	1.57	37

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2024	70
2015	69.4
2019	69.3
2026	69.2
2022	69
2021	68.8
1948	68.3
1981	68.2
1931	68.2
2023	68
More years share the last value

Coldest
Year	Mean, °F
1912	54.7
1965	55.6
1961	56.3
1971	57.5
1918	58.1
1985	58.8
2006	58.9
1929	58.9
1999	59.2
2003	59.3
More years share the last value

Wettest
Year	Precipitation, in
2013	5.61
1961	4.67
1909	3.78
1902	3.70
1938	3.42
2012	2.95
1936	2.89
1918	2.89
1875	2.89
1973	2.85
More years share the last value

Driest
Year	Precipitation, in
1944	trace
1892	trace
1992	0.01
1956	0.01
1921	0.02
1879	0.02
1893	0.05
2010	0.06
1920	0.06
1882	0.06

The hottest, coldest and wettest days

Hottest day: 94°F; 13 September 2026, 5 September 2026
Coldest night: 49°F; 20 September 2026
Wettest day: 1.10 in; 25 September 2026

Every month, season and year

Months

Seasons

Years

Denver, CO the day's answers

All-time records

Every answer in words

September 2026 brought 2.23 in of precipitation in Denver, CO, the wettest September since 2013, 22nd wettest of 155.
The hottest day of September 2026 in Denver, CO: 94°F on Sunday 13 September 2026 and Saturday 5 September 2026.
The coldest night of September 2026 in Denver, CO: a low of 49°F on Sunday 20 September 2026.
The wettest day of September 2026 in Denver, CO: 1.10 in on Friday 25 September 2026.