Cheyenne, WY: September

30 September 2026: September 2026 averaged 64.4°F in Cheyenne, WY, the warmest September since 2015, 2nd warmest of 154.

September 2026

Mean temperature: 64.4°F; Warmest since 2015; 2nd warmest of 154
Precipitation: 0.56 in; Driest since 2024; 49th driest of 156

A normal September in Cheyenne, WY (1991 to 2020): a mean temperature of 59.4°F, between 56.1°F and 62.3°F in eight years of ten and 1.16 in of precipitation, between 0.14 in and 3.07 in in eight years of ten.

The mean temperature of every September in Cheyenne, WY since 1873: 64.4°F in 2026; the highest is 64.7°F, in 2015.

Normal range, 56.1 to 62.3°F

Every year, ranked, as a table

Every September in Cheyenne, WY 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	64.4	2	77.2	11	51.6	1	0.56	106	0
2025	61.1	26	74.4	44	47.8	16	1.66	43	0
2024	64	3	79.9	1	48.2	13	0.37	125	0
2023	63.4	8	77.9	9	48.8	7	0.42	120	0
2022	64	3	78.6	5	49.4	6	1.12	67	0
2021	63.6	7	79	4	48.2	13	0.21	138	0
2020	59.8	45	74.6	42	44.9	52	0.60	105	0
2019	64	3	79.3	3	48.6	8	0.51	113	0
2018	62.1	12	77	12	47.1	23	0.09	147	0
2017	59.6	46	72.4	74	46.7	26	1.08	71	0
2016	60.6	35	75.7	26	45.4	44	0.80	91	0
2015	64.7	1	79.5	2	49.8	3	0.14	143	0
2014	60.3	39	73.9	51	46.7	26	1.74	39	0
2013	61.5	18	73	59	50	2	6.95	1	0
2012	60.8	28	75.1	33	46.4	33	1.30	55	0
2011	58.7	60	73	59	44.4	66	0.45	119	0
2010	61.5	18	78.2	6	44.8	57	0.01	152	0
2009	58.7	60	72.8	65	44.5	64	1.14	64	0
2008	56.3	113	69.7	110	43	100	1.12	67	0
2007	59.1	53	72	80	46.2	37	1.23	61	0
2006	54.1	139	67.5	137	40.8	135	1.02	78	0
2005	62.1	12	76.9	14	47.2	20	0.28	135	0
2004	58.7	60	71.8	84	45.6	39	3.06	10	0
2003	56.4	111	70.6	101	42.2	113	1.24	60	0
2002	59.1	53	71.1	92	47.1	23	1.73	40	0
2001	61.5	18	76.6	19	46.4	33	1.18	63	0
2000	58.2	73	72.5	72	43.9	74	2.64	15	0
1999	54	142	67.7	135	40.3	141	2.11	24	0
1998	63.9	6	78.2	6	49.7	4	0.49	115	0
1997	59.2	51	70.7	100	47.7	17	2.06	28	0
1996	56.6	106	69.3	122	43.9	74	2.34	19	0
1995	57.1	93	69.5	115	44.6	62	3.39	6	0
1994	61.7	16	77	12	46.4	33	0.38	124	0
1993	54.2	136	66.7	142	41.8	120	3.16	9	0
1992	60	42	74.9	37	45	49	0.01	152	0
1991	58	77	71.3	89	44.6	62	1.87	31	0
1990	62.2	11	75.7	26	48.6	8	0.80	91	0
1989	57.5	89	71.3	89	43.7	79	1.62	46	0
1988	57.5	89	71.4	87	43.5	86	1.66	43	0
1987	57.9	81	73.1	57	42.8	102	0.93	82	0
1986	55.3	122	66.9	140	43.7	79	2.47	17	0
1985	52.8	151	65.2	148	40.4	139	1.78	35	0
1984	52.9	150	66.4	144	39.5	146	0.65	104	0
1983	58.9	57	74.8	40	43.1	96	0.78	93	0
1982	56.6	106	68.4	130	44.9	52	2.87	11	0
1981	61.2	22	75.2	32	47.2	20	0.31	132	0
1980	60.4	37	75.8	24	44.9	52	0.97	81	0
1979	62.8	10	78.1	8	47.6	18	0.32	131	0
1978	59.5	48	74.3	46	44.8	57	0.12	145	0
1977	60.6	35	75.9	22	45.4	44	0.19	140	0
1976	57.7	84	71.1	92	44.3	68	0.77	95	0
1975	56	117	70.6	101	41.3	128	0.52	112	0
1974	55.2	125	68.2	132	42.3	112	0.50	114	0
1973	54.1	139	65	149	43.1	96	4.52	2	0
1972	56.6	106	69.6	112	43.5	86	1.01	79	0
1971	53.1	147	65.9	147	40.2	142	1.76	36	0
1970	55	127	69.4	121	40.6	137	1.10	69	0
1969	61.2	22	75.7	26	46.7	26	0.84	88	0
1968	57.6	86	73.1	57	42.1	115	0.20	139	0
1967	58.4	69	71.4	87	45.3	46	0.88	87	0
1966	59.9	44	73	59	46.7	26	2.12	23	0
1965	49.6	153	60.8	153	38.4	151	1.32	54	0
1964	56.9	99	72.1	79	41.7	122	0.33	130	0
1963	63.1	9	76.7	18	49.5	5	3.28	8	0
1962	58.9	57	74.1	50	43.7	79	1.30	55	0
1961	51.4	152	64.5	150	38.3	152	2.17	22	0
1960	61.2	22	75.6	30	46.7	26	0.66	103	0
1959	55.7	120	68.9	126	42.5	109	1.61	47	0
1958	58.6	65	73.4	55	43.7	79	0.91	85	0
1957	55.3	122	69.3	122	41.4	125	0.56	106	0
1956	61	27	77.6	10	44.5	64	0.14	143	0
1955	58.7	60	72.3	75	45.1	48	1.40	49	0
1954	61.4	21	75.9	22	46.8	25	1.08	71	0
1953	60.8	28	76.8	16	44.8	57	0.10	146	0
1952	60.7	32	76.5	20	45	49	0.29	133	0
1951	54.6	131	69.5	115	39.7	145	0.75	96	0
1950	54.9	130	66.3	145	43.5	86	2.67	14	0
1949	57.8	82	72.5	72	43.1	96	0.25	136	0
1948	61.7	16	76.8	16	46.6	31	0.54	109	0
1947	60.7	32	75.7	26	45.6	39	0.78	93	0
1946	56.7	105	71	94	42.4	110	0.81	90	0
1945	54.3	135	69.5	115	39.1	148	1.43	48	0
1944	57.3	92	74.4	44	40.2	142	0.18	142	0
1943	57.5	89	75	35	40	144	0.53	111	0
1942	55.3	122	69.5	115	41.1	131	1.70	42	0
1941	54.6	131	68.8	128	40.4	139	1.10	69	0
1940	60.1	41	71.7	85	48.5	10	3.75	4	0
1939	60.2	40	75.5	31	44.9	52	0.49	115	0
1938	60	42	73.6	53	46.4	33	3.33	7	0
1937	60.4	37	76.1	21	44.7	60	0.49	115	0
1936	58.3	71	73.6	53	43	100	1.14	64	0
1935	57.8	82	72.2	77	43.4	90	1.72	41	0
1934	53.4	146	67.9	133	39	149	0.72	101	0
1933	60.8	28	73.4	55	48.3	12	2.06	28	0
1932	58.3	71	71.6	86	44.9	52	1.13	66	0
1931	61.8	15	75.1	33	48.4	11	0.75	96	0
1930	56.8	101	70.1	109	43.4	90	1.28	57	0
1929	53	149	64.3	151	41.6	123	1.81	33	0
1928	57.1	93	70.4	103	43.9	74	0.08	149	0
1927	56.1	116	68.4	130	43.9	74	1.03	76	0
1926	54.2	136	67.6	136	40.8	135	0.37	125	0
1925	58	77	70.3	106	45.6	39	0.19	140	0
1924	54.6	131	67.8	134	41.3	128	2.36	18	0
1923	55.8	118	67.5	137	44	72	2.78	13	0
1922	60.8	28	75	35	46.5	32	0.36	127	0
1921	58.5	67	72.6	71	44.3	68	0.02	151	0
1920	57.1	93	69.5	115	44.7	60	2.31	20	0
1919	59	56	70.8	97	47.2	20	1.76	36	0
1918	53.1	147	64	152	42.2	113	2.57	16	0
1917	58.6	65	71.9	83	45.2	47	0.56	106	0
1916	55.8	118	69.7	110	41.8	120	1.00	80	0
1915	54.6	131	66.5	143	42.6	106	2.10	25	0
1914	58	77	72.7	68	43.2	94	0.41	121	0
1913	54.1	139	66.2	146	41.9	117	2.82	12	0
1912	49.1	154	60.7	154	37.6	153	3.91	3	0
1911	60.7	32	73.9	51	47.5	19	1.35	52	0
1910	59.4	49	72.9	63	45.9	38	1.80	34	0
1909	57	97	70.4	103	43.6	83	1.37	51	0
1908	59.1	53	74.9	37	43.3	93	0.09	147	0
1907	56.8	101	70.8	97	42.8	102	0.92	83	0
1906	57	97	69.6	112	44.4	66	1.86	32	0
1905	58.7	60	74.3	46	43.1	96	1.06	73	0
1904	58	77	72	80	44.1	71	0.83	89	0
1903	53.9	143	66.8	141	40.9	134	1.40	49	0
1902	53.9	143	68.7	129	39.2	147	3.52	5	0
1901	56.5	109	70.9	95	42	116	0.75	96	0
1900	56.2	114	68.9	126	43.5	86	2.19	21	0
1899	59.3	50	74.8	40	43.9	74	0.07	150	0
1898	57.1	93	73	59	41.1	131	0.47	118	0
1897	61.9	14	75.8	24	47.9	15	0.41	121	0
1896	55	127	67.2	139	42.8	102	2.08	27	0
1895	59.6	46	74.9	37	44.2	70	0.39	123	0
1894	56.5	109	70.3	106	42.6	106	1.23	61	0
1893	58.2	73	72.7	68	43.6	83	0.29	133	0
1892	61.2	22	76.9	14	45.5	43	0.22	137	0
1891	58.9	57	72.9	63	45	49	2.09	26	0
1890	56.8	101	72.2	77	41.4	125	trace	154	0
1889	55	127	69.5	115	40.6	137	0.54	109	0
1888	58.5	67	74.6	42	42.4	110	1.66	43	0
1887	59.2	51	72.8	65	45.6	39	1.25	58	0
1886	55.7	120	70.4	103	41	133	1.05	74	0
1885	56.9	99	70.2	108	43.6	83	0.69	102	0
1884	57.7	84	72.7	68	42.7	105	1.25	58	0
1883	58.1	75	72.8	65	43.4	90	0.90	86	0
1882	58.4	69	74.3	46	42.6	106	0.35	129	0
1881	55.2	125	69	125	41.4	125	1.75	38	0
1880	57.6	86	72	80	43.2	94	1.05	74	0
1879	58.1	75	74.2	49	41.9	117	0.00	156	0
1878	53.5	145	69.3	122	37.6	153	0.75	96	0
1877	56.4	111	70.9	95	41.9	117	2.02	30	0
1876	56.8	101	72.3	75	41.3	128	trace	154	0
1875	57.6	86	71.2	91	44	72	1.34	53	0
1874	54.2	136	69.6	112	38.9	150	0.92	83	0
1873	56.2	114	70.8	97	41.6	123	0.36	127	0
1872							1.03	76	30
1871							0.74	100	30

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2015	64.7
2026	64.4
2024	64
2022	64
2019	64
1998	63.9
2021	63.6
2023	63.4
1963	63.1
1979	62.8

Coldest
Year	Mean, °F
1912	49.1
1965	49.6
1961	51.4
1985	52.8
1984	52.9
1929	53
1971	53.1
1918	53.1
1934	53.4
1878	53.5

Wettest
Year	Precipitation, in
2013	6.95
1973	4.52
1912	3.91
1940	3.75
1902	3.52
1995	3.39
1938	3.33
1963	3.28
1993	3.16
2004	3.06

Driest
Year	Precipitation, in
1879	0.00
1890	trace
1876	trace
2010	0.01
1992	0.01
1921	0.02
1899	0.07
1928	0.08
2018	0.09
1908	0.09

The hottest, coldest and wettest days

Hottest day: 88°F; 4 September 2026
Coldest night: 41°F; 21 September 2026
Wettest day: 0.16 in; 18 September 2026

Every month, season and year

Months

Seasons

Years

Cheyenne, WY the day's answers

All-time records

Every answer in words

September 2026 brought 0.56 in of precipitation in Cheyenne, WY, the driest September since 2024, tied 49th driest of 156 (with 1957 and 1917).
The hottest day of September 2026 in Cheyenne, WY: 88°F on Friday 4 September 2026.
The coldest night of September 2026 in Cheyenne, WY: a low of 41°F on Monday 21 September 2026.
The wettest day of September 2026 in Cheyenne, WY: 0.16 in on Friday 18 September 2026.