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
Dec 1 40° 59° 28° (1932) 73° (1956) 0.13" NA
Dec 2 40° 59° 28° (1928) 75° (1959) 0.13" NA
Dec 3 40° 59° 28° (1936) 75° (1958) 0.12" NA
Dec 4 40° 58° 24° (1936) 74° (1958) 0.12" NA
Dec 5 40° 58° 26° (1972) 76° (1959) 0.12" NA
Dec 6 39° 58° 29° (1931) 74° (1932) 0.12" NA
Dec 7 39° 58° 28° (1972) 74° (1917) 0.12" NA
Dec 8 39° 58° 20° (1932) 77° (1943) 0.12" NA
Dec 9 39° 58° 19° (1932) 72° (1943) 0.12" NA
Dec 10 39° 57° 18° (1932) 75° (1943) 0.12" NA
Dec 11 39° 57° 17° (1932) 76° (1940) 0.12" NA
Dec 12 39° 57° 26° (1931) 75° (1958) 0.12" NA
Dec 13 39° 57° 24° (1919) 72° (1934) 0.12" NA
Dec 14 39° 57° 24° (1932) 73° (1958) 0.12" NA
Dec 15 38° 57° 25° (1932) 71° (1980) 0.12" NA
Dec 16 38° 57° 26° (1928) 72° (1958) 0.12" NA
Dec 17 38° 56° 26° (1924) 76° (1958) 0.12" NA
Dec 18 38° 56° 23° (1924) 68° (1939) 0.12" NA
Dec 19 38° 56° 22° (1924) 76° (1999) 0.12" NA
Dec 20 38° 56° 23° (1990) 76° (1999) 0.12" NA
Dec 21 38° 56° 23° (1990) 74° (1999) 0.12" NA
Dec 22 38° 56° 14° (1990) 73° (1999) 0.13" NA
Dec 23 38° 56° 17° (1990) 70° (1939) 0.13" NA
Dec 24 38° 56° 21° (1990) 67° (1967) 0.13" NA
Dec 25 38° 56° 24° (1990) 72° (1972) 0.13" NA
Dec 26 38° 56° 22° (1924) 81° (1967) 0.13" NA
Dec 27 38° 56° 23° (1918) 75° (1967) 0.13" NA
Dec 28 38° 56° 24° (1918) 75° (1917) 0.14" NA
Dec 29 38° 55° 25° (1918) 71° (1967) 0.14" NA
Dec 30 38° 55° 22° (1990) 71° (1995) 0.14" NA
Dec 31 38° 55° 24° (1990) 74° (1995) 0.14" NA
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