Casper August 18 Weather Records

Daily averages and all-time records for weather in Casper, Wyoming for the date of August 18.

August 18 All-Time Records 1900–2023
Highest temperature	101 °F	1911
Lowest temperature	37 °F	2009
Lowest daily high	62 °F	1956
Highest daily low	70 °F	2023
Most precipitation	0.5 inches	1978
Most snow	none	-

August 18 All-Time Records
1900–2023

Highest temperature

101 °F

37 °F

62 °F

Highest daily low

70 °F

2023

Most precipitation

0.5 inches

1978

Most snow

none

August 18 Average Weather 1991–2020 ¹
Average high	86.6 °F
Average low	51.5 °F
Chance precipitation	18.0%
Chance snow	0%

August 18 Average Weather
1991–2020 ¹

Average high

86.6 °F

Average low

51.5 °F

Chance precipitation

18.0%

Chance snow

Casper August 18 Weather by Year

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	93	70	0.00	0.0
2022	86	51	0.00	0.0
2021	85	49	0.14	0.0
2020	97	52	0.00	0.0
2019	90	46	0.00	0.0
2018	77	52	0.13	0.0
2017	87	46	0.00	0.0
2016	75	51	0.05	0.0
2015	65	41	0.03	0.0
2014	88	50	0.00	0.0
2013	94	54	0.00	0.0
2012	81	46	0.00	0.0
2011	93	53	0.00	0.0
2010	97	52	0.00	0.0
2009	81	37	0.00	0.0
2008	84	45	0.00	0.0
2007	90	58	0.00	0.0
2006	81	54	0.00	0.0
2005	79	47	0.04	0.0
2004	63	52	0.18	0.0
2003	71	52	0.25	0.0
2002	80	42	0.00	0.0
2001	93	44	0.00	0.0
2000	89	48	0.18	0.0
1999	89	46	0.00	0.0
1998	89	58	0.06	n/a
1997	85	53	0.01	n/a
1996	89	53	0.17	n/a
1995	74	51	0.00	0.0
1994	91	55	0.00	0.0
1993	86	47	0.00	0.0
1992	90	51	0.00	0.0
1991	86	49	0.00	0.0
1990	83	50	0.18	0.0
1989	82	50	0.20	0.0
1988	92	49	0.00	0.0
1987	85	39	0.00	0.0
1986	99	58	0.00	0.0
1985	77	41	0.00	0.0
1984	90	52	0.00	0.0
1983	92	60	0.14	0.0
1982	95	59	0.00	0.0
1981	91	47	0.00	0.0
1980	90	56	0.00	0.0
1979	69	55	0.44	0.0
1978	64	43	0.48	0.0
1977	71	56	0.01	0.0
1976	86	65	0.00	0.0
1975	90	47	0.00	0.0
1974	89	49	0.00	0.0
1973	90	57	0.00	0.0
1972	83	57	0.00	0.0
1971	87	54	0.00	0.0
1970	91	53	0.00	0.0
1969	88	60	0.00	0.0
1968	70	48	0.00	0.0
1967	84	51	0.00	0.0
1966	90	53	0.01	0.0
1965	84	50	0.00	0.0
1964	90	62	0.00	0.0
1963	82	53	0.00	0.0
1962	87	62	0.03	0.0
1961	87	57	0.00	0.0
1960	77	44	0.00	0.0
1959	93	58	0.00	0.0
1958	88	61	0.00	0.0
1957	83	50	0.00	0.0
1956	62	50	0.00	0.0
1955	91	60	0.06	0.0
1954	82	52	0.00	0.0
1953	85	53	0.00	0.0
1952	92	56	0.00	0.0
1951	88	56	0.00	0.0
1950	89	53	0.00	0.0
1949	86	54	0.00	0.0
1948	95	59	0.00	0.0
1939	91	58	0.00	0.0
1938	89	40	0.00	n/a
1937	86	56	0.00	0.0
1936	91	52	0.00	0.0
1935	79	56	0.00	0.0
1934	65	59	0.00	0.0
1932	91	62	0.00	0.0
1931	86	56	0.00	n/a
1930	84	51	n/a	n/a
1929	91	61	0.10	n/a
1928	89	45	n/a	n/a
1927	74	52	n/a	n/a
1926	87	52	n/a	n/a
1925	87	56	n/a	n/a
1924	86	54	n/a	n/a
1923	84	49	n/a	n/a
1922	87	57	0.00	n/a
1921	90	64	0.00	n/a
1920	90	60	0.00	n/a
1917	82	57	0.00	0.0
1916	85	70	0.00	n/a
1915	79	41	0.11	0.0
1914	82	49	0.00	0.0
1913	91	54	0.00	n/a
1912	100	44	0.27	n/a
1911	101	65	0.00	n/a
1901	90	52	0.00	0.0

What's the all-time high for Casper on 8/18?

For the date of Aug 18, the highest temperature ever reached in Casper history is 101 °F which happened in 1911.

Highest Temperatures in Casper on August 18

Rank	Temperature	Year
1	101 °F	1911
2	100 °F	1912
3	99 °F	1986
4	97 °F	2020
4	97 °F	2010
6	95 °F	1948
6	95 °F	1982
8	94 °F	2013
9	93 °F	2001
9	93 °F	2023
9	93 °F	2011
9	93 °F	1959

What's the all-time low for Casper on 8/18?

For the date of Aug 18, the lowest temperature ever reached in Casper history is 37 °F which happened in 2009.

Lowest Temperatures in Casper on August 18

Rank	Temperature	Year
1	37 °F	2009
2	39 °F	1987
3	40 °F	1938
4	41 °F	1985
4	41 °F	1915
4	41 °F	2015
7	42 °F	2002
8	43 °F	1978
9	44 °F	1960
9	44 °F	2001
9	44 °F	1912

Lowest High Temperatures in Casper on August 18

Rank	Temperature	Year
1	62 °F	1956
2	63 °F	2004
3	64 °F	1978
4	65 °F	1934
4	65 °F	2015
6	69 °F	1979
7	70 °F	1968
8	71 °F	1977
8	71 °F	2003
10	74 °F	1927
10	74 °F	1995

What's the most it has ever rained in Casper on 8/18?

For the date of Aug 18, the most precipitation ever recorded in Casper history is 0.48 inches which happened in 1978.

All-Time Most Precipitation in Casper on August 18

Rank	Precipitation	Year
1	0.48 inches	1978
2	0.44 inches	1979
3	0.27 inches	1912
4	0.25 inches	2003
5	0.20 inches	1989
6	0.18 inches	1990
6	0.18 inches	2004
6	0.18 inches	2000
9	0.17 inches	1996
10	0.14 inches	2021
10	0.14 inches	1983

Weather Station Details

Years	Station	Coordinates
1949–2023	Casper-Natrona County International Airport	location
1900–1948	Casper 2 E	location