Average December Temperature in Napa by Year

This page contains a list of the average monthly high and low temperatures in Napa, California for the month of December each year between 1901 and 2023. It is based on NOAA data.

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What Was the Hottest December Ever in Napa?

1995 was the warmest December in the history of Napa, California. The average daily high temperature was 61.7 °F, and the average low was 45.7 °F.

What Was the Coldest December Ever in Napa?

1918 was the coolest December in the history of Napa, California. The average daily high temperature was 44.8 °F, and the average low was 31.2 °F.

* click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	12	61.3	41.8
2022	73	55.9	37.9
2021	85	53.7	39.3
2020	48	61.8	35.2
2019	31	57.4	41.7
2018	41	59.1	38.9
2017	71	61.4	32.7
2016	70	58.0	36.2
2015	89	56.5	35.6
2014	9	59.3	44.3
2013	109	59.0	27.7
2012	67	56.9	37.7
2011	95	59.8	31.0
2010	32	56.2	42.6
2009	107	53.0	34.4
2008	113	52.9	32.4
2007	103	55.6	33.3
2006	86	57.4	35.2
2005	40	58.0	40.1
2004	82	56.2	37.0
2003	55	56.3	39.5
2002	44	57.2	40.0
2001	35	55.6	42.9
2000	84	57.2	35.8
1999	80	61.2	32.3
1998	92	56.4	34.9
1997	19	60.2	41.3
1996	14	58.8	43.7
1995	1	61.7	45.7
1994	90	53.6	38.3
1993	75	56.1	37.6
1992	98	53.9	36.3
1991	65	57.6	37.1
1990	114	54.7	29.9
1989	100	56.8	33.2
1988	63	57.2	38.0
1987	50	54.9	41.8
1985	97	53.6	37.0
1984	76	55.9	37.7
1983	11	58.0	45.4
1982	42	58.0	39.6
1981	8	59.7	44.0
1980	20	62.0	39.2
1979	21	62.1	38.8
1978	101	56.5	33.4
1977	5	60.4	44.6
1976	49	63.0	33.9
1975	37	60.9	37.6
1974	60	56.9	38.4
1973	29	56.8	42.5
1972	110	51.7	34.9
1971	96	54.9	35.7
1970	57	55.2	40.4
1969	7	60.7	43.3
1968	77	56.1	37.5
1966	51	55.9	40.6
1965	105	53.5	34.5
1964	22	57.4	43.4
1963	106	53.8	34.2
1962	36	58.4	40.1
1961	72	56.8	37.1
1960	53	57.6	38.6
1959	38	62.7	35.7
1958	2	67.0	39.9
1957	54	58.6	37.5
1956	45	63.6	33.6
1955	18	58.7	42.9
1954	79	55.6	38.0
1953	15	63.3	39.0
1952	34	55.7	42.9
1951	69	55.9	38.3
1950	10	58.7	44.8
1949	83	57.8	35.3
1948	104	54.4	33.9
1947	61	58.8	36.5
1946	56	56.6	39.2
1945	27	58.8	40.6
1943	3	65.4	40.3
1942	24	60.7	39.2
1941	28	58.2	41.2
1940	4	63.1	42.2
1939	6	64.0	40.3
1938	16	61.8	40.0
1937	30	61.5	37.7
1936	94	55.6	35.3
1935	74	57.3	36.4
1934	17	61.9	39.7
1933	59	55.7	39.7
1932	102	59.8	29.9
1931	78	56.3	37.2
1930	46	62.2	34.9
1929	13	60.1	42.5
1928	68	60.5	33.7
1927	88	54.9	37.2
1926	91	53.8	37.7
1925	66	56.4	38.3
1924	111	50.5	35.5
1922	81	53.3	40.1
1920	43	57.5	40.0
1919	93	55.9	35.2
1918	115	44.8	31.2
1917	23	61.6	38.5
1913	33	54.8	44.1
1912	26	57.3	42.3
1911	87	55.4	36.7
1910	47	57.6	39.6
1909	99	52.0	38.1
1908	108	49.7	36.9
1907	62	53.7	41.5
1906	39	55.2	43.1
1905	112	51.8	34.2
1904	64	55.4	39.7
1903	52	58.3	38.2
1902	58	57.4	38.2
1901	25	61.9	37.9

Weather Station Details

Years	Station	Coordinates
1999–2024	Napa County Airport	location
1901–1998	Napa State Hospital	location