Knoxville, TN: September

30 September 2026: September 2026 averaged 77.6°F in Knoxville, TN, the warmest September since 2019, 3rd warmest of 156.

September 2026

Mean temperature: 77.6°F; Warmest since 2019; 3rd warmest of 156
Precipitation: 1.99 in; Driest since 2023; 60th driest of 156

A normal September in Knoxville, TN (1991 to 2020): a mean temperature of 71.3°F, between 69°F and 76°F in eight years of ten and 3.39 in of precipitation, between 1.16 in and 6.29 in in eight years of ten.

The mean temperature of every September in Knoxville, TN since 1871: 77.6°F in 2026; the highest is 79.7°F, in 1925.

Normal range, 69 to 76°F

Every year, ranked, as a table

Every September in Knoxville, TN from 1871 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	77.6	3	88.8	4	66.4	6	1.99	97	0
2025	72	63	82.3	68	61.7	60	2.92	66	0
2024	72.8	47	82.7	56	62.8	39	6.33	14	0
2023	73.3	36	84.6	29	62	53	0.42	151	0
2022	70.5	91	81.4	85	59.6	108	2.46	85	0
2021	70.9	83	80.7	99	61	72	1.72	110	0
2020	70.8	86	80.1	113	61.6	65	4.57	27	0
2019	78.4	2	90.8	2	66	8	0.03	156	0
2018	76.4	9	85.1	23	67.6	3	7.40	7	0
2017	70.2	98	80.7	99	59.6	108	2.43	87	0
2016	76.6	8	88.8	4	64.5	21	1.42	125	0
2015	72.3	55	82.1	72	62.5	46	1.58	119	0
2014	73.1	41	82.9	53	63.2	37	0.19	155	0
2013	71.3	75	81.6	80	61.1	71	4.42	29	0
2012	70.5	91	80.9	96	60.2	95	7.64	5	0
2011	69.9	113	79.5	123	60.2	95	8.74	2	0
2010	73.2	37	84.6	29	61.7	60	4.34	33	0
2009	71.7	68	79.4	126	64.1	24	4.64	25	0
2008	73	44	83.2	45	62.8	39	3.16	60	0
2007	74.7	22	86.4	16	63	38	1.49	122	0
2006	68.2	139	77.6	147	58.8	118	6.17	15	0
2005	74.1	27	86.5	15	61.6	65	1.74	109	0
2004	70.2	98	79.6	120	60.7	79	4.75	23	0
2003	69.4	120	79.5	123	59.2	116	5.14	19	0
2002	74.9	20	84.8	26	64.9	16	5.17	18	0
2001	68.2	139	78	139	58.3	125	3.56	47	0
2000	70.6	88	80.7	99	60.6	83	3.82	40	0
1999	69.9	113	83.3	44	56.5	151	0.82	140	0
1998	76	12	88.4	6	63.6	32	1.31	126	0
1997	71.7	68	82.4	65	60.9	76	3.32	56	0
1996	68.9	130	78.5	135	59.3	112	3.45	50	0
1995	70.5	91	80.7	99	60.2	95	2.46	85	0
1994	69	129	79.9	116	58.1	130	1.20	130	0
1993	70.6	88	81.8	77	59.3	112	4.77	22	0
1992	71.3	75	80.5	106	62	53	1.77	107	0
1991	71.4	74	81.5	83	61.3	70	3.14	61	0
1990	72.1	59	83.2	45	61	72	2.68	75	0
1989	70.9	83	80	115	61.8	58	9.19	1	0
1988	71.3	75	81.7	79	60.8	77	2.68	75	0
1987	70	105	82.6	57	57.5	141	1.93	100	0
1986	72.8	47	83	51	62.5	46	3.59	46	0
1985	68.5	137	83	51	54	155	0.42	151	0
1984	67.1	150	80.8	98	53.4	156	0.85	139	0
1983	70.3	97	82.3	68	58.3	125	0.95	136	0
1982	70	105	79.6	120	60.4	93	2.68	75	0
1981	70.2	98	80.2	109	60.1	98	6.09	16	0
1980	73.7	33	82.5	62	64.8	18	2.38	89	0
1979	72.2	56	80.2	109	64.2	23	2.64	78	0
1978	74.8	21	84.6	29	65	14	1.26	129	0
1977	74	28	82	73	66	8	6.91	10	0
1976	67.7	147	78	139	57.4	145	2.87	70	0
1975	68.9	130	78.5	135	59.3	112	3.28	57	0
1974	69.7	117	78	139	61.5	68	3.33	55	0
1973	73.8	30	83.5	42	64	25	3.28	57	0
1972	71.9	64	81.3	88	62.5	46	4.70	24	0
1971	73.2	37	81.6	80	64.9	16	3.41	51	0
1970	75.3	19	84.8	26	65.8	10	2.75	73	0
1969	69.3	123	78.9	131	59.7	106	3.03	63	0
1968	69.1	126	80.1	113	58	134	2.53	79	0
1967	65.5	155	75.8	154	55.3	154	2.70	74	0
1966	68.8	134	77.9	144	59.8	101	4.41	30	0
1965	73.5	34	83.5	42	63.5	34	2.48	82	0
1964	70	105	81.3	88	58.7	119	1.10	132	0
1963	69.4	120	80.7	99	58.1	130	2.37	91	0
1962	70.9	83	81.3	88	60.5	85	5.13	20	0
1961	72.4	53	84.3	33	60.5	85	0.50	149	0
1960	73.1	41	82.4	65	63.7	29	4.58	26	0
1959	73.1	41	83.6	39	62.7	42	0.93	138	0
1958	72.1	59	83.7	37	60.5	85	1.49	122	0
1957	72.7	51	81.5	83	63.8	27	6.98	9	0
1956	69.1	126	79.5	123	58.6	122	1.66	112	0
1955	75.5	17	87.4	11	63.6	32	2.48	82	0
1954	76	12	89.5	3	62.5	46	1.30	127	0
1953	71.5	72	84.2	35	58.7	119	2.93	65	0
1952	70.4	94	82.6	57	58.1	130	1.94	99	0
1951	71.9	64	83.1	48	60.7	79	4.37	32	0
1950	69.4	120	78.9	131	59.9	99	1.75	108	0
1949	67.5	148	78	139	57	148	2.38	89	0
1948	71.5	72	82.5	62	60.5	85	1.52	120	0
1947	72.8	47	84.2	35	61.4	69	1.28	128	1
1946	70.2	98	81.1	91	59.3	112	1.64	113	0
1945	74.5	25	85.3	22	63.7	29	2.88	69	0
1944	71.8	67	81.4	85	62.2	52	8.61	3	0
1943	67.9	144	79.2	129	56.6	150	3.51	48	0
1942	69.3	123	80.7	99	57.8	137	2.82	72	0
1941	75.8	15	88.4	6	63.3	36	0.75	142	0
1940	69.7	117	82	73	57.3	146	1.17	131	0
1939	75.9	14	88	9	63.8	27	0.94	137	0
1938	71.9	64	81.8	77	62	53	3.13	62	0
1937	71.1	80	81.4	85	60.7	79	2.11	95	0
1936	76.1	11	86.7	14	65.5	11	2.13	94	0
1935	73.8	30	85.8	20	61.7	60	0.27	153	0
1934	72.9	45	83.7	37	62	53	2.92	66	0
1933	76.2	10	87.4	11	65	14	3.50	49	0
1932	72.1	59	82.2	70	61.9	57	3.67	44	0
1931	76.8	6	88.4	6	65.2	13	1.95	98	0
1930	73.9	29	83.1	48	64.7	20	4.56	28	0
1929	71	82	80.2	109	61.8	58	4.39	31	0
1928	67.1	150	76.6	151	57.5	141	3.02	64	0
1927	73.2	37	84.8	26	61.6	65	0.78	141	0
1926	76.8	6	85.9	19	67.8	2	1.84	105	0
1925	79.7	1	91	1	68.4	1	2.48	82	0
1924	66.6	154	75.9	153	56.8	149	6.80	12	2
1923	72.4	53	83.1	48	61.7	60	1.50	121	0
1922	73.5	34	84.3	33	62.7	42	1.86	104	0
1921	77.4	4	87.5	10	67.4	4	1.63	114	0
1920	71.7	68	80.7	99	62.6	45	2.51	81	0
1919	72.1	59	83.6	39	60.6	83	0.96	135	0
1918	65.1	156	74.9	156	55.4	153	1.59	117	0
1917	68.7	135	78.1	137	59.4	111	3.22	59	0
1916	68.7	135	79.6	120	57.7	139	2.84	71	0
1915	72.8	47	82.8	55	62.7	42	4.04	37	0
1914	70	105	80.5	106	59.5	110	1.04	134	0
1913	70.2	98	79.8	117	60.5	85	3.34	54	0
1912	74.4	26	84.4	32	64.3	22	5.08	21	0
1911	77.1	5	87.1	13	67.1	5	1.89	102	0
1910	73.2	37	82.6	57	63.7	29	3.68	43	0
1909	68.9	130	78.1	137	59.8	101	2.91	68	0
1908	70	105	80.9	96	59.1	117	1.78	106	0
1907	70.4	94	79.8	117	61	72	6.89	11	0
1906	74.7	22	83.2	45	66.3	7	3.82	40	0
1905	72.2	56	82.6	57	61.7	60	0.55	148	0
1904	72.2	56	83.6	39	60.7	79	1.10	132	0
1903	70	105	82.5	62	57.5	141	0.62	146	0
1902	67.9	144	77.9	144	57.9	135	8.04	4	0
1901	68.1	143	78	139	58.2	128	4.13	36	0
1900	75.7	16	86.1	18	65.3	12	3.41	51	0
1899	69.9	113	82.2	70	57.7	139	1.68	111	0
1898	72.7	51	82.9	53	62.4	51	7.44	6	0
1897	71.7	68	85	24	58.3	125	1.92	101	0
1896	71.3	75	82.6	57	59.9	99	2.02	96	0
1895	74.7	22	85.4	21	64	25	0.59	147	0
1894	72.9	45	82.4	65	63.4	35	0.47	150	0
1893	70.4	94	81	93	59.8	101	1.45	124	0
1892	69.2	125	81	93	57.5	141	0.63	145	0
1891	71.1	80	81.9	75	60.3	94	1.59	117	0
1890	70.6	88	78.8	133	62.5	46	3.83	39	0
1889	67.5	148	77.1	149	57.9	135	5.74	17	0
1888	67	152	75.3	155	58.7	119	6.55	13	0
1887	69.6	119	81.1	91	58.2	128	1.63	114	0
1886	71.3	75	81.6	80	61	72	1.88	103	0
1885	70	105	79.4	126	60.5	85	2.21	93	0
1884	73.8	30	84.9	25	62.8	39	0.66	144	0
1883	70.8	86	81.9	75	59.7	106	2.53	79	0
1882	70.1	103	79.3	128	60.8	77	4.15	34	0
1881	75.5	17	86.2	17	64.8	18	2.31	92	0
1880	67.8	146	77	150	58.6	122	3.64	45	0
1879	68.3	138	81	93	55.7	152	0.22	154	0
1878	70	105	80.2	109	59.8	101	0.73	143	0
1877	69.1	126	77.6	147	60.5	85	7.38	8	0
1876	68.2	139	78.6	134	57.8	137	1.60	116	0
1875	66.7	153	76.1	152	57.3	146	4.14	35	0
1874	70.1	103	80.4	108	59.8	101	2.43	87	0
1873	69.9	113	79.2	129	60.5	85	3.79	42	0
1872	68.9	130	79.7	119	58.1	130	3.89	38	0
1871	68.2	139	77.8	146	58.6	122	3.37	53	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1925	79.7
2019	78.4
2026	77.6
1921	77.4
1911	77.1
1931	76.8
1926	76.8
2016	76.6
2018	76.4
1933	76.2

Coldest
Year	Mean, °F
1918	65.1
1967	65.5
1924	66.6
1875	66.7
1888	67
1984	67.1
1928	67.1
1949	67.5
1889	67.5
1976	67.7

Wettest
Year	Precipitation, in
1989	9.19
2011	8.74
1944	8.61
1902	8.04
2012	7.64
1898	7.44
2018	7.40
1877	7.38
1957	6.98
1977	6.91

Driest
Year	Precipitation, in
2019	0.03
2014	0.19
1879	0.22
1935	0.27
2023	0.42
1985	0.42
1894	0.47
1961	0.50
1905	0.55
1895	0.59

The hottest, coldest and wettest days

Hottest day: 98°F; 4 September 2026
Coldest night: 50°F; 27 September 2026
Wettest day: 1.18 in; 23 September 2026

Every month, season and year

Months

Seasons

Years

Knoxville, TN the day's answers

All-time records

Every answer in words

September 2026 brought 1.99 in of precipitation in Knoxville, TN, the driest September since 2023, 60th driest of 156.
The hottest day of September 2026 in Knoxville, TN: 98°F on Friday 4 September 2026.
The coldest night of September 2026 in Knoxville, TN: a low of 50°F on Sunday 27 September 2026.
The wettest day of September 2026 in Knoxville, TN: 1.18 in on Wednesday 23 September 2026.