Casper, WY: Fall

9 October 2026: Fall 2026 so far averaged 62°F in Casper, WY, the warmest 1 September to 9 October since 2015, 3rd warmest of 87.

Fall 2026 so far, to 9 October 2026

Mean temperature: 62°F; Warmest since 2015; 3rd warmest of 87
Precipitation: 0.76 in; Driest since 2024; 35th driest of 87

A normal 1 September to 9 October in Casper, WY (1991 to 2020): a mean temperature of 57.3°F, between 54°F and 59.1°F in eight years of ten and 1.44 in of precipitation, between 0.49 in and 2.41 in in eight years of ten.

The mean temperature of every 1 September to 9 October in Casper, WY since 1940: 62°F in 2026; the highest is 64.1°F, in 1963.

Normal range, 54 to 59.1°F

Every year, ranked, as a table

Every 1 September to 9 October in Casper, WY from 1940 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	62	3	79.8	2	44.2	10	0.76	53
2025	59.3	22	75.1	28	43.6	14	3.21	7
2024	61.4	4	81.2	1	41.7	34	0.24	82
2023	59.1	24	76.2	17	41.9	30	0.64	58
2022	59.6	17	77.1	8	42.1	26	0.88	51
2021	60.3	10	78.3	7	42.2	24	0.89	49
2020	57.3	43	75.5	23	39.2	69	0.54	66
2019	57.9	37	74.4	34	41.4	39	1.79	19
2018	56.7	51	73.9	43	39.6	65	1.69	24
2017	54	73	68.7	72	39.3	68	2.32	14
2016	56.8	49	72.1	52	41.6	36	1.60	27
2015	62.3	2	79.2	4	45.5	4	0.26	79
2014	57.4	41	74.4	34	40.5	55	1.22	39
2013	57.5	40	71.1	59	44	12	3.63	4
2012	57.1	46	74.3	38	40	61	0.46	72
2011	58.9	27	75.7	22	42.1	26	1.21	40
2010	59.3	22	78.4	6	40.2	60	0.40	73
2009	53.8	74	70.7	62	36.9	81	2.38	13
2008	54.8	64	72.2	51	37.4	80	1.09	45
2007	57.6	39	73.6	45	41.6	36	1.09	45
2006	54.3	67	69.2	69	39.4	66	1.68	25
2005	58.4	34	74.9	29	41.9	30	1.36	36
2004	57.3	43	73	47	41.6	36	1.86	18
2003	54.9	62	71.4	56	38.4	72	1.38	35
2002	55.2	58	70	65	40.5	55	1.55	29
2001	58.7	31	75.2	26	42.2	24	1.42	33
2000	53.8	74	69.9	66	37.7	75	1.66	26
1999	53.1	80	69.3	67	36.8	82	1.34	37
1998	60.9	6	76.2	17	45.6	3	1.72	21
1997	58.8	29	73.8	44	43.9	13	1.47	31
1996	55.5	56	72.5	49	38.4	72	0.52	69
1995	55.2	58	69.3	67	41.1	45	3.06	9
1994	58.9	27	74.4	34	43.5	16	2.66	11
1993	56.8	49	71.6	54	41.9	30	1.70	23
1992	59.1	24	76.5	14	41.7	34	0.49	71
1991	58	36	74.3	38	41.8	33	0.52	69
1990	59.4	19	75.5	23	43.2	19	0.64	58
1989	55.7	55	70.5	63	40.9	48	3.22	6
1988	56.5	52	72.5	49	40.6	52	0.75	54
1987	57.1	46	74.4	34	39.8	63	0.59	61
1986	53.3	78	65.8	83	40.8	50	3.02	10
1985	50.2	86	64.5	84	36	85	1.45	32
1984	52.2	83	68.9	71	35.4	87	0.55	64
1983	58.5	33	75.9	21	41.2	41	0.53	68
1982	54.3	67	67.4	80	41.2	41	4.00	1
1981	59.6	17	76.6	13	42.6	22	0.28	78
1980	58.6	32	76.5	14	40.6	52	0.10	86
1979	60	13	78.9	5	41.1	45	0.22	84
1978	57.7	38	74.6	30	40.9	48	0.26	79
1977	57.3	43	74.6	30	40	61	0.59	61
1976	56.9	48	71.3	58	42.5	23	1.77	20
1975	56.5	52	74.3	38	38.7	71	0.12	85
1974	53.2	79	68.7	72	37.7	75	1.21	40
1973	54.2	69	67.5	79	40.8	50	3.75	3
1972	55.3	57	71.8	53	38.8	70	1.28	38
1971	52.7	81	67.8	78	37.5	78	0.89	49
1970	52.6	82	68.3	75	36.8	82	0.94	48
1969	59	26	76	20	42	29	0.68	56
1968	54.2	69	71	60	37.5	78	0.58	63
1967	59.7	15	74.6	30	44.9	7	2.43	12
1966	59.4	19	75.5	23	43.3	17	0.73	55
1965	50.1	87	64.5	84	35.7	86	2.07	16
1964	54.1	72	71.4	56	36.8	82	0.34	75
1963	64.1	1	79.3	3	48.9	1	0.33	77
1962	57.4	41	72.6	48	42.1	26	3.63	4
1961	50.4	85	63.1	87	37.7	75	3.07	8
1960	59.7	15	74.1	41	45.4	5	0.61	60
1959	53.4	76	66.4	81	40.3	59	2.17	15
1958	58.8	29	74.5	33	43	21	0.36	74
1957	55.1	60	69.1	70	41.1	45	1.20	42
1956	60.1	12	77.1	8	43.1	20	0.07	87
1955	59.4	19	74	42	44.7	8	0.67	57
1954	60.8	7	76.5	14	45.2	6	0.55	64
1953	60.4	9	77.1	8	43.6	14	0.24	82
1952	60	13	76.7	12	43.3	17	0.25	81
1951	54.4	66	68.1	76	40.6	52	1.59	28
1950	53.4	76	66.4	81	40.5	55	3.83	2
1949	54.7	65	71.5	55	37.8	74	1.71	22
1948	60.2	11	76.2	17	44.2	10	1.20	42
1947	60.7	8	77	11	44.4	9	0.34	75
1946	54.9	62	68.5	74	41.2	41	1.90	17
1945	54.2	69	68	77	40.4	58	1.39	34
1944	55.1	60	70.4	64	39.8	63	1.15	44
1943	58.2	35	75.2	26	41.2	41	0.88	51
1942	56.2	54	70.9	61	41.4	39	0.54	66
1941	51.9	84	64.4	86	39.4	66	1.00	47
1940	61.2	5	73.6	45	48.9	1	1.53	30

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1963	64.1
2015	62.3
2026	62
2024	61.4
1940	61.2
1998	60.9
1954	60.8
1947	60.7
1953	60.4
2021	60.3

Coldest
Year	Mean, °F
1965	50.1
1985	50.2
1961	50.4
1941	51.9
1984	52.2
1970	52.6
1971	52.7
1999	53.1
1974	53.2
1986	53.3

Wettest
Year	Precipitation, in
1982	4.00
1950	3.83
1973	3.75
2013	3.63
1962	3.63
1989	3.22
2025	3.21
1961	3.07
1995	3.06
1986	3.02

Driest
Year	Precipitation, in
1956	0.07
1980	0.10
1975	0.12
1979	0.22
2024	0.24
1953	0.24
1952	0.25
2015	0.26
1978	0.26
1981	0.28

The hottest, coldest and wettest days

Hottest day: 91°F; 6 September 2026, 5 September 2026
Coldest night: 33°F; 4 October 2026
Wettest day: 0.35 in; 13 September 2026

Every month, season and year

Months

Seasons

Years

Casper, WY the day's answers

All-time records

Every answer in words

Fall 2026 so far brought 0.76 in of precipitation in Casper, WY, the driest 1 September to 9 October since 2024, 35th driest of 87.
The hottest day of fall 2026 so far in Casper, WY: 91°F on Sunday 6 September 2026 and Saturday 5 September 2026.
The coldest night of fall 2026 so far in Casper, WY: a low of 33°F on Sunday 4 October 2026.
The wettest day of fall 2026 so far in Casper, WY: 0.35 in on Sunday 13 September 2026.