Casper, WY: August

31 August 2026: August 2026 averaged 71.5°F in Casper, WY, the warmest August since 2013, 16th warmest of 87.

August 2026

Mean temperature: 71.5°F; Warmest since 2013; 16th warmest of 87
Precipitation: 2.01 in; Wettest since 2007; 5th wettest of 87

A normal August in Casper, WY (1991 to 2020): a mean temperature of 69.7°F, between 66.6°F and 72.4°F in eight years of ten and 0.71 in of precipitation, between 0.16 in and 1.47 in in eight years of ten.

The mean temperature of every August in Casper, WY since 1940: 71.5°F in 2026; the highest is 74.7°F, in 1983.

Normal range, 66.6 to 72.4°F

Every year, ranked, as a table

Every August 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	71.5	16	88.6	16	54.4	20	2.01	5
2025	69.2	43	87.2	29	51.3	62	0.72	38
2024	70	33	88.4	19	51.5	59	0.39	56
2023	68.1	58	84.5	59	51.8	53	1.01	19
2022	70.6	26	88.5	17	52.6	40	1.99	6
2021	68.2	57	86.4	39	50	72	0.94	25
2020	71.4	17	90.9	3	51.9	50	0.05	84
2019	69.7	38	89.1	12	50.2	69	0.17	74
2018	67.6	66	85.8	45	49.3	78	0.33	60
2017	67.3	69	84.8	56	49.9	73	0.94	25
2016	66.7	73	84.9	54	48.4	83	1.30	13
2015	68.3	55	86.2	41	50.3	67	0.83	32
2014	67.6	66	84.2	63	51	64	1.10	17
2013	71.8	12	89.1	12	54.5	18	0.70	41
2012	70.7	25	88.9	14	52.4	42	0.20	73
2011	71.7	14	90.2	7	53.2	32	0.23	69
2010	70.3	30	86.5	37	54	26	0.40	55
2009	65.4	84	84.2	63	46.6	87	1.34	12
2008	68.3	55	86.5	37	50.1	71	0.72	38
2007	70.6	26	86.9	32	54.3	23	2.57	3
2006	69.7	38	86.6	35	52.9	35	1.45	11
2005	66.3	79	83.4	72	49.2	80	2.24	4
2004	64.5	86	81.6	84	47.4	86	0.44	53
2003	72.4	6	88.5	17	56.2	8	1.68	9
2002	66.6	75	84.5	59	48.7	81	0.53	49
2001	72	10	89.3	11	54.8	16	0.31	63
2000	72.4	6	90.6	5	54.1	24	0.95	24
1999	69.9	35	87.5	26	52.4	42	0.11	78
1998	69.9	35	87.1	30	52.7	39	0.59	46
1997	68.4	52	83.9	67	52.9	35	0.76	36
1996	67.9	64	87.6	25	48.1	84	0.32	61
1995	72.6	5	91.2	2	54	26	0.04	85
1994	73.4	3	90.3	6	56.4	7	0.85	30
1993	68	59	84	65	52	48	1.14	15
1992	68.4	52	84.5	59	52.3	45	0.86	29
1991	72	10	88.9	14	55.1	13	0.61	43
1990	68.5	51	85.4	50	51.6	55	1.89	7
1989	69	46	86.1	42	51.9	50	1.00	20
1988	69.8	37	87.9	22	51.6	55	0.16	75
1987	66.1	81	82.7	78	49.6	76	1.80	8
1986	69.3	42	86.6	35	52	48	0.27	66
1985	66.7	73	84.7	57	48.6	82	0.09	81
1984	71.1	20	88.4	19	53.9	28	0.25	67
1983	74.7	1	91.7	1	57.8	2	0.75	37
1982	73.7	2	90.7	4	56.6	5	0.88	28
1981	69.2	43	86.8	33	51.6	55	0.50	50
1980	66.4	78	83.5	70	49.3	78	0.65	42
1979	67.6	66	82.4	79	52.9	35	2.66	2
1978	66.8	72	82.1	80	51.5	59	0.93	27
1977	66.1	81	81.9	83	50.3	67	0.34	58
1976	68.4	52	84.4	62	52.3	45	0.31	63
1975	68	59	85	52	51	64	0.12	77
1974	64.4	87	80.8	86	48	85	1.00	20
1973	70.6	26	88	21	53.3	31	0.34	58
1972	68	59	83.6	68	52.4	42	1.52	10
1971	71.2	18	89.4	10	53.1	33	0.11	78
1970	72.2	8	90.1	8	54.4	20	0.16	75
1969	71.8	12	90	9	53.6	30	0.78	34
1968	64.9	85	80.3	87	49.4	77	0.61	43
1967	68.9	47	86.4	39	51.5	59	0.41	54
1966	66.5	76	83.4	72	49.7	74	1.03	18
1965	66.3	79	82.9	76	49.7	74	0.21	72
1964	66	83	81.2	85	50.9	66	0.47	51
1963	70.4	29	84.7	57	56.1	9	0.39	56
1962	67.7	65	83.6	68	51.8	53	0.25	67
1961	72.1	9	86.7	34	57.5	3	0.08	83
1960	67.2	70	83.4	72	51.1	63	0.57	47
1959	70.3	30	86.1	42	54.5	18	0.23	69
1958	71.2	18	87.5	26	55	14	1.00	20
1957	71	22	85.2	51	56.9	4	1.13	16
1956	67	71	82.1	80	51.9	50	0.77	35
1955	73.2	4	87.8	23	58.5	1	0.81	33
1954	71.1	20	87.5	26	54.7	17	0.29	65
1953	70.8	24	85.8	45	55.7	11	0.98	23
1952	70.2	32	85.5	49	54.9	15	0.61	43
1951	68	59	83	75	53	34	0.10	80
1950	66.5	76	82.9	76	50.2	69	0.02	86
1949	69.7	38	87.8	23	51.6	55	0.45	52
1948	69.7	38	85.8	45	53.7	29	0.23	69
1947	71	22	86.1	42	55.8	10	0.71	40
1946	68	59	83.5	70	52.5	41	0.56	48
1945	69.2	43	84	65	54.4	20	1.17	14
1944	68.6	50	85	52	52.2	47	trace	87
1943	71.7	14	87	31	56.5	6	0.09	81
1942	68.8	48	84.9	54	52.8	38	0.32	61
1941	68.8	48	82	82	55.6	12	2.79	1
1940	70	33	85.8	45	54.1	24	0.85	30

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1983	74.7
1982	73.7
1994	73.4
1955	73.2
1995	72.6
2003	72.4
2000	72.4
1970	72.2
1961	72.1
2001	72
More years share the last value

Coldest
Year	Mean, °F
1974	64.4
2004	64.5
1968	64.9
2009	65.4
1964	66
1987	66.1
1977	66.1
2005	66.3
1965	66.3
1980	66.4

Wettest
Year	Precipitation, in
1941	2.79
1979	2.66
2007	2.57
2005	2.24
2026	2.01
2022	1.99
1990	1.89
1987	1.80
2003	1.68
1972	1.52

Driest
Year	Precipitation, in
1944	trace
1950	0.02
1995	0.04
2020	0.05
1961	0.08
1985	0.09
1943	0.09
1951	0.10
1999	0.11
1971	0.11

The hottest, coldest and wettest days

Hottest day: 103°F; 2 August 2026
Coldest night: 44°F; 5 August 2026
Wettest day: 1.26 in; 13 August 2026

Every month, season and year

Months

Seasons

Years

Casper, WY the day's answers

All-time records

Every answer in words

August 2026 brought 2.01 in of precipitation in Casper, WY, the wettest August since 2007, 5th wettest of 87.
The hottest day of August 2026 in Casper, WY: 103°F on Sunday 2 August 2026.
The coldest night of August 2026 in Casper, WY: a low of 44°F on Wednesday 5 August 2026.
The wettest day of August 2026 in Casper, WY: 1.26 in on Thursday 13 August 2026.