Average May 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 May each year between 1901 and 2023. It is based on NOAA data.

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What Was the Hottest May Ever in Napa?

1984 was the warmest May in the history of Napa, California. The average daily high temperature was 81.8 °F, and the average low was 51.6 °F.

What Was the Coldest May Ever in Napa?

2010 was the coolest May in the history of Napa, California. The average daily high temperature was 68.4 °F, and the average low was 42.2 °F.

* click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	79	68.8	50.3
2022	48	76.8	45.6
2021	38	76.5	46.6
2020	22	76.9	47.6
2019	96	67.6	49.0
2018	67	71.8	48.8
2017	20	75.9	49.4
2016	63	72.5	48.6
2015	101	67.9	47.7
2014	54	75.4	46.2
2013	25	77.1	47.1
2012	71	74.2	45.6
2011	115	68.5	43.5
2010	118	68.4	42.2
2009	68	73.0	47.4
2008	69	74.3	46.0
2007	64	74.6	46.4
2006	72	72.0	47.8
2005	88	71.3	47.3
2004	57	74.7	46.6
2003	94	72.0	44.8
2002	103	71.9	43.7
2001	11	80.9	46.5
2000	37	74.3	48.9
1999	113	68.7	43.5
1998	97	68.2	48.5
1997	2	81.7	51.3
1996	19	75.9	49.4
1995	65	71.0	50.0
1994	39	73.2	49.8
1993	14	74.5	52.3
1992	5	79.1	51.6
1991	85	72.8	46.0
1990	31	73.7	49.8
1989	29	75.4	48.3
1988	40	75.7	47.2
1987	7	77.8	51.4
1986	24	75.6	48.7
1985	23	75.7	48.6
1984	1	81.8	51.6
1983	36	74.9	48.3
1982	27	75.2	48.9
1981	12	76.8	50.3
1980	91	72.9	45.3
1978	6	80.9	49.1
1977	107	70.4	44.8
1976	26	79.1	45.1
1975	13	77.3	49.6
1974	90	73.5	45.0
1973	17	76.9	49.3
1972	35	75.6	47.6
1971	73	72.1	47.6
1970	9	80.3	47.8
1969	15	77.6	48.8
1968	74	73.6	46.0
1967	34	75.7	47.6
1966	43	75.0	47.7
1965	59	75.6	45.7
1964	99	72.3	43.5
1963	78	71.4	47.9
1962	82	72.9	46.0
1961	105	71.1	44.2
1960	52	75.8	46.0
1959	61	76.1	45.1
1958	46	75.0	47.5
1957	62	72.9	48.2
1956	53	74.4	47.3
1955	32	77.0	46.5
1954	45	75.7	46.9
1953	106	71.4	43.7
1952	28	77.8	46.0
1951	55	74.1	47.5
1950	70	75.0	45.1
1949	84	73.7	45.2
1948	108	70.6	44.4
1947	18	77.1	48.3
1945	98	69.5	46.4
1944	60	75.2	46.0
1943	8	80.6	48.2
1942	93	72.6	44.3
1941	16	75.5	50.8
1940	41	74.5	48.3
1939	50	76.1	46.2
1938	58	75.2	46.1
1937	87	73.6	45.2
1936	49	74.0	48.3
1935	95	71.0	45.7
1934	33	76.0	47.5
1932	44	75.5	47.2
1931	3	80.7	52.1
1930	109	71.0	43.9
1929	77	75.9	43.4
1928	89	70.8	47.7
1927	110	70.6	43.7
1926	86	72.3	46.4
1925	104	65.9	49.5
1924	66	72.7	47.9
1923	112	69.0	44.2
1922	51	76.5	45.3
1921	111	69.8	44.2
1920	75	77.5	42.1
1919	80	73.9	45.3
1918	117	71.6	40.2
1917	116	69.6	42.2
1914	47	70.8	51.7
1913	21	72.3	52.5
1912	56	71.1	50.3
1911	114	66.7	45.2
1910	10	77.3	50.2
1909	92	72.3	45.8
1908	83	72.5	46.3
1907	76	70.5	48.8
1906	81	68.0	50.9
1905	100	68.3	47.5
1904	4	81.2	50.4
1903	30	76.3	47.3
1902	102	69.7	45.9
1901	42	73.6	49.2

Weather Station Details

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