Average December Temperature in Casper by Year

This page contains a list of the average monthly high and low temperatures in Casper, Wyoming for the month of December each year between 1900 and 2023. It is based on NOAA data.

Change:

Month:

What Was the Hottest December Ever in Casper?

1933 was the warmest December in the history of Casper, Wyoming. The average daily high temperature was 49.6 °F, and the average low was 26.4 °F.

What Was the Coldest December Ever in Casper?

1983 was the coolest December in the history of Casper, Wyoming. The average daily high temperature was 22.1 °F, and the average low was -0.3 °F.

* click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	5	42.6	21.5
2022	71	34.7	12.3
2021	17	41.7	18.5
2020	49	35.7	16.8
2019	45	33.8	19.6
2018	56	35.6	15.0
2017	77	33.0	12.1
2016	91	29.4	6.2
2015	61	33.2	16.4
2014	32	38.2	18.7
2013	86	30.3	10.4
2012	47	37.2	15.6
2011	68	33.1	14.9
2010	44	37.2	16.7
2009	95	26.4	4.9
2008	84	33.6	7.2
2007	83	29.5	12.3
2006	40	38.1	16.8
2005	64	34.8	14.5
2004	20	39.4	20.2
2003	26	38.0	20.0
2002	31	38.4	18.6
2001	57	35.4	15.1
2000	87	31.1	8.7
1999	19	39.7	20.1
1998	65	35.9	13.0
1997	75	31.5	14.0
1996	53	36.0	15.9
1995	34	40.1	16.6
1994	8	41.1	22.4
1993	27	37.7	20.1
1992	78	32.0	11.8
1991	39	37.2	18.6
1990	94	26.8	4.8
1989	63	35.7	13.7
1988	48	35.5	17.1
1987	70	34.8	12.7
1986	51	35.7	16.6
1985	81	30.2	12.4
1984	74	34.8	11.0
1983	97	22.1	-0.3
1982	73	31.4	15.1
1981	41	38.9	15.7
1980	3	46.0	22.6
1979	28	38.5	18.9
1978	96	23.8	2.5
1977	60	36.3	13.4
1976	36	38.4	18.1
1975	33	37.7	19.1
1974	67	32.7	15.9
1973	46	36.0	17.4
1972	92	26.6	8.8
1971	69	32.7	15.1
1970	58	35.2	15.2
1969	30	39.6	17.4
1968	89	29.6	8.0
1967	93	27.4	7.3
1966	55	35.5	15.1
1965	24	39.0	19.1
1964	72	32.9	13.8
1963	59	35.1	14.6
1962	15	41.2	19.5
1961	80	31.3	11.9
1960	54	35.9	15.2
1959	16	41.9	18.8
1958	25	39.1	18.9
1957	7	40.8	22.8
1956	35	37.4	19.3
1955	42	37.1	17.3
1954	21	38.2	21.4
1953	62	33.6	15.8
1952	37	36.3	20.2
1951	85	31.8	8.9
1950	11	41.9	20.3
1949	66	36.0	12.7
1948	76	34.0	11.5
1938	43	37.1	17.1
1937	50	35.3	17.2
1936	14	39.9	21.6
1933	1	49.6	26.4
1931	9	40.9	22.3
1930	23	40.4	18.6
1929	4	43.4	24.8
1926	38	37.0	19.0
1925	6	40.9	22.9
1924	79	31.2	12.5
1923	52	37.1	15.1
1922	29	37.6	19.8
1921	10	40.6	22.3
1920	13	38.7	23.0
1918	22	39.3	20.0
1917	12	42.0	19.7
1914	88	31.2	7.7
1913	82	33.7	8.1
1910	18	41.2	18.9
1909	90	28.0	7.6
1900	2	44.4	24.4

Weather Station Details

Years	Station	Coordinates
1949–2024	Casper-Natrona County International Airport	location
1900–1948	Casper 2 E	location