Napa September 1 Weather Records

September 1 All-Time Records 1901–2024
Highest temperature	107 °F	1955
Lowest temperature	44 °F	1957
Lowest daily high	65 °F	2000
Highest daily low	62 °F	1985
Most precipitation	0.01 inches	2000

September 1 Average Weather 1991–2020 ¹
Average high	80.7 °F
Average low	52.7 °F
Chance precipitation	1.4%

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	75	60	0.00	n/a
2022	89	51	0.00	n/a
2021	69	52	0.00	n/a
2020	74	56	0.00	n/a
2019	86	54	0.00	n/a
2018	74	49	0.00	n/a
2017	106	57	0.00	0.0
2016	73	55	0.00	n/a
2015	74	57	0.00	n/a
2014	91	52	0.00	n/a
2013	84	57	0.00	n/a
2012	69	53	0.00	n/a
2011	82	46	0.00	n/a
2010	94	48	0.00	n/a
2009	85	52	0.00	n/a
2008	91	51	0.00	n/a
2007	93	51	0.00	n/a
2006	76	49	0.00	n/a
2005	76	50	0.00	n/a
2004	81	53	0.00	n/a
2003	82	49	0.00	n/a
2002	99	48	0.00	n/a
2001	80	56	0.00	n/a
2000	65	58	0.01	n/a
1999	78	45	0.00	n/a
1998	95	57	0.00	0.0
1997	83	54	0.00	0.0
1996	74	57	0.00	0.0
1995	78	55	0.00	0.0
1994	75	56	0.00	0.0
1993	92	56	0.00	0.0
1992	80	55	0.00	0.0
1991	83	58	0.00	0.0
1990	80	54	0.00	0.0
1989	81	54	0.00	0.0
1988	80	52	0.00	0.0
1987	85	59	0.00	0.0
1986	80	57	0.00	0.0
1985	83	62	0.00	0.0
1984	95	56	0.00	0.0
1983	82	50	0.00	0.0
1982	94	51	0.00	0.0
1981	81	54	0.00	0.0
1980	78	52	0.00	0.0
1979	85	56	0.00	0.0
1978	91	58	0.00	0.0
1977	73	49	0.00	0.0
1976	90	53	0.00	0.0
1975	82	48	0.00	0.0
1974	78	53	0.00	0.0
1973	86	49	0.00	0.0
1972	82	52	0.00	0.0
1971	83	51	0.00	0.0
1970	78	51	0.00	0.0
1969	98	54	0.00	0.0
1968	82	60	0.00	0.0
1967	86	51	0.00	0.0
1966	87	54	0.00	0.0
1965	76	53	0.00	0.0
1964	75	50	0.00	0.0
1963	84	49	0.00	0.0
1962	79	53	0.00	0.0
1961	87	55	0.00	0.0
1960	74	54	0.00	0.0
1959	82	46	0.00	0.0
1958	81	54	0.00	0.0
1957	91	44	0.00	0.0
1956	83	49	0.00	0.0
1955	107	53	0.00	0.0
1954	90	53	0.00	0.0
1953	78	57	0.00	0.0
1952	105	60	0.00	0.0
1951	72	51	0.00	0.0
1950	103	52	0.00	0.0
1949	77	55	0.00	0.0
1948	90	50	0.00	0.0
1947	102	52	0.00	n/a
1946	71	51	0.00	n/a
1945	82	48	0.00	n/a
1944	86	50	0.00	n/a
1943	86	52	0.00	n/a
1942	78	51	0.00	n/a
1941	80	49	0.00	n/a
1940	79	50	0.00	n/a
1939	83	44	0.00	n/a
1938	80	47	0.00	n/a
1937	69	50	0.00	n/a
1936	77	53	0.00	n/a
1935	73	48	0.00	n/a
1934	84	53	0.00	n/a
1933	n/a	n/a	0.00	n/a
1932	102	46	0.00	n/a
1931	80	49	0.00	n/a
1930	74	52	0.00	n/a
1929	82	48	0.00	n/a
1928	71	45	0.00	n/a
1927	79	50	0.00	n/a
1926	87	54	0.00	n/a
1925	70	53	0.00	n/a
1924	76	47	0.00	n/a
1923	80	57	0.00	n/a
1922	91	53	0.00	n/a
1921	70	50	0.00	n/a
1920	82	48	0.00	n/a
1919	77	46	0.00	n/a
1918	84	56	0.00	n/a
1917	73	52	0.00	n/a
1916	n/a	n/a	n/a	n/a
1915	n/a	n/a	n/a	n/a
1914	71	54	0.00	n/a
1913	72	62	0.00	n/a
1912	79	58	0.00	n/a
1911	70	50	0.00	n/a
1910	83	45	0.00	n/a
1909	72	53	n/a	n/a
1908	97	53	0.00	n/a
1907	77	60	0.00	n/a
1906	75	58	0.00	n/a
1905	75	53	0.00	n/a
1904	89	49	0.00	n/a
1903	100	51	0.00	n/a
1902	100	55	0.00	n/a
1901	77	44	0.00	n/a

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

Rank	Temperature	Year
1	107 °F	1955
2	106 °F	2017
3	105 °F	1952
4	103 °F	1950
5	102 °F	1947
5	102 °F	1932
7	100 °F	1903
7	100 °F	1902
9	99 °F	2002
10	98 °F	1969

Rank	Temperature	Year
1	65 °F	2000
2	69 °F	1937
2	69 °F	2021
2	69 °F	2012
5	70 °F	1911
5	70 °F	1921
5	70 °F	1925
8	71 °F	1928
8	71 °F	1946
8	71 °F	1914

Napa September 1 Weather Records

Napa September 1 Weather by Year