Napa, California
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 39° 57° 19° (1937) 85° (1962) 5.35" 0"
February 42° 62° 23° (1917) 85° (1948) 5.03" 0"
March 43° 65° 23° (1949) 90° (1955) 4.09" 0"
April 45° 71° 27° (1929) 95° (2004) 1.45" 0"
May 49° 75° 30° (1974) 103° (2001) 0.78" 0"
June 53° 81° 34° (1929) 113° (1961) 0.16" 0"
July 55° 83° 38° (1929) 112° (1972) 0.05" 0"
August 55° 82° 37° (1932) 106° (1998) 0.11" 0"
September 53° 82° 36° (1932) 109° (1955) 0.41" 0"
October 49° 76° 28° (1946) 106° (1980) 1.43" 0"
November 43° 64° 25° (1932) 89° (1929) 3.72" 0"
December 39° 57° 14° (1990) 81° (1967) 3.88" 0"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Sep 1 54° 82° 44° (1939) 107° (1955) 0.01" NA
Sep 2 54° 83° 41° (1928) 109° (1955) 0.01" NA
Sep 3 54° 83° 40° (1917) 105° (1950) 0.01" NA
Sep 4 54° 82° 42° (1932) 105° (1950) 0.01" NA
Sep 5 54° 82° 42° (1932) 100° (1958) 0.01" NA
Sep 6 54° 82° 44° (1922) 100° (1923) 0.01" NA
Sep 7 54° 82° 43° (1932) 101° (1936) 0.01" NA
Sep 8 54° 82° 42° (1928) 104° (1944) 0.01" NA
Sep 9 54° 82° 40° (1931) 109° (1944) 0.01" NA
Sep 10 54° 82° 39° (1928) 105° (1944) 0.01" NA
Sep 11 54° 82° 43° (1931) 107° (1979) 0.01" NA
Sep 12 53° 82° 42° (1946) 107° (1979) 0.01" NA
Sep 13 53° 82° 39° (1921) 107° (1971) 0.01" NA
Sep 14 53° 82° 40° (1921) 108° (1971) 0.01" NA
Sep 15 53° 82° 41° (1936) 106° (1971) 0.01" NA
Sep 16 53° 82° 43° (1936) 101° (1923) 0.01" NA
Sep 17 53° 82° 42° (1952) 101° (1984) 0.01" NA
Sep 18 53° 82° 42° (1926) 101° (1919) 0.01" NA
Sep 19 53° 82° 37° (1926) 104° (1919) 0.01" NA
Sep 20 53° 82° 40° (1917) 105° (1939) 0.02" NA
Sep 21 53° 82° 42° (1924) 105° (1939) 0.02" NA
Sep 22 53° 82° 36° (1932) 105° (1939) 0.02" NA
Sep 23 52° 81° 39° (1932) 106° (1939) 0.02" NA
Sep 24 52° 81° 39° (1932) 104° (1964) 0.02" NA
Sep 25 52° 81° 39° (1934) 101° (1960) 0.02" NA
Sep 26 52° 81° 38° (1929) 105° (1963) 0.02" NA
Sep 27 52° 81° 40° (1934) 101° (1921) 0.02" NA
Sep 28 52° 81° 40° (1929) 102° (1921) 0.02" NA
Sep 29 52° 81° 38° (1929) 101° (1966) 0.02" NA
Sep 30 52° 81° 40° (1925) 100° (1980) 0.02" NA
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