July weather in Napa, CA
The average temperature in Napa in July is 69.4°F (55.5°F–83.3°F). Average precipitation: 0.00 inches.
July is a summer month in Napa, and is warmer than the annual average of 60.3°F. Daily temperatures swing about 27.8°F between overnight low and afternoon high. Expect about 0 days with precipitation. Daylight averages about 14h 25m. For travel, July is a comfortable month to visit.
Avg High
83.3°F
Avg Low
55.5°F
Precipitation
0.00 in
Daylight
14h 25m
July records in Napa
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| July 1 | 102.9°F (1972) | 43.0°F (1975) | 0.00 in (1893) |
| July 2 | 105.1°F (1929) | 44.1°F (1901) | 0.13 in (1980) |
| July 3 | 104.0°F (1903) | 39.0°F (1901) | 0.00 in (1893) |
| July 4 | 107.1°F (1905) | 44.1°F (1901) | 0.03 in (1895) |
| July 5 | 106.0°F (1931) | 44.1°F (1955) | 0.00 in (1893) |
| July 6 | 106.0°F (1921) | 44.1°F (1903) | 0.04 in (1984) |
| July 7 | 109.9°F (1905) | 42.1°F (1935) | 0.00 in (1893) |
| July 8 | 102.9°F (2008) | 39.9°F (1921) | 0.81 in (1974) |
| July 9 | 106.0°F (1961) | 43.0°F (1921) | 0.24 in (1974) |
| July 10 | 108.0°F (1961) | 43.0°F (1918) | 0.00 in (1893) |
| July 11 | 106.0°F (1913) | 43.0°F (1920) | 0.00 in (1893) |
| July 12 | 100.9°F (1983) | 44.1°F (1929) | 0.00 in (1893) |
| July 13 | 104.0°F (1972) | 37.9°F (1929) | 0.00 in (1893) |
| July 14 | 111.9°F (1972) | 45.0°F (1946) | 0.00 in (1893) |
| July 15 | 109.0°F (1972) | 44.1°F (1920) | 0.14 in (1975) |
| July 16 | 102.9°F (1995) | 43.0°F (1920) | 0.00 in (1893) |
| July 17 | 106.0°F (1988) | 42.1°F (1920) | 0.00 in (1893) |
| July 18 | 102.9°F (1988) | 39.9°F (1927) | 0.00 in (1893) |
| July 19 | 100.9°F (1961) | 45.0°F (1944) | 0.00 in (1893) |
| July 20 | 107.1°F (1917) | 46.0°F (1918) | 0.00 in (1893) |
| July 21 | 107.1°F (1917) | 44.1°F (1929) | 0.00 in (1893) |
| July 22 | 107.1°F (2006) | 45.0°F (1898) | 0.20 in (1937) |
| July 23 | 108.0°F (2006) | 41.0°F (1932) | 0.00 in (1893) |
| July 24 | 102.0°F (2005) | 46.9°F (1903) | 0.00 in (1893) |
| July 25 | 100.9°F (1975) | 45.0°F (1921) | 0.04 in (1965) |
| July 26 | 106.0°F (1898) | 45.0°F (1924) | 0.00 in (1893) |
| July 27 | 99.0°F (1943) | 44.1°F (1917) | 0.00 in (1893) |
| July 28 | 107.1°F (1954) | 41.0°F (1918) | 0.10 in (1964) |
| July 29 | 105.1°F (1954) | 41.0°F (1932) | 0.00 in (1893) |
| July 30 | 102.9°F (1977) | 43.0°F (1961) | 0.04 in (1966) |
| July 31 | 102.0°F (1993) | 41.0°F (1924) | 0.00 in (1893) |