March weather in Napa, CA
The average temperature in Napa in March is 55.5°F (43.6°F–67.5°F). Average precipitation: 3.67 inches.
March is a spring month in Napa, and is cooler than the annual average of 60.3°F. Daily temperatures swing about 23.9°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 11h 45m. For travel, March is a comfortable month to visit.
Avg High
67.5°F
Avg Low
43.6°F
Precipitation
3.67 in
Daylight
11h 45m
March records in Napa
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| March 1 | 81.0°F (1929) | 27.0°F (1896) | 1.65 in (2018) |
| March 2 | 79.0°F (1910) | 27.0°F (1951) | 1.73 in (1989) |
| March 3 | 84.0°F (1929) | 27.0°F (1966) | 1.50 in (1991) |
| March 4 | 81.0°F (2020) | 28.9°F (1939) | 1.38 in (1991) |
| March 5 | 84.0°F (1901) | 26.1°F (1918) | 1.62 in (1930) |
| March 6 | 81.0°F (1899) | 27.0°F (1918) | 1.94 in (2006) |
| March 7 | 84.9°F (1953) | 28.9°F (1917) | 2.61 in (1911) |
| March 8 | 90.0°F (1955) | 23.0°F (1949) | 1.70 in (1986) |
| March 9 | 84.0°F (2004) | 28.9°F (1935) | 2.47 in (1995) |
| March 10 | 86.0°F (2004) | 28.0°F (1919) | 2.35 in (1986) |
| March 11 | 87.1°F (2005) | 28.9°F (1897) | 1.51 in (1995) |
| March 12 | 86.0°F (2005) | 28.0°F (1897) | 1.49 in (1937) |
| March 13 | 82.9°F (1926) | 28.9°F (1969) | 2.33 in (1983) |
| March 14 | 82.9°F (2004) | 28.9°F (1917) | 3.30 in (2003) |
| March 15 | 86.0°F (2004) | 28.9°F (1917) | 1.81 in (1952) |
| March 16 | 88.0°F (2004) | 28.0°F (1963) | 1.43 in (1963) |
| March 17 | 91.9°F (1914) | 25.0°F (1963) | 1.30 in (1907) |
| March 18 | 89.1°F (2026) | 32.0°F (1920) | 1.17 in (2011) |
| March 19 | 88.0°F (2026) | 30.9°F (1935) | 1.31 in (1907) |
| March 20 | 90.0°F (2026) | 28.9°F (1952) | 1.58 in (1920) |
| March 21 | 91.9°F (2026) | 30.0°F (1924) | 1.44 in (1937) |
| March 22 | 87.1°F (1927) | 30.9°F (1933) | 1.29 in (2017) |
| March 23 | 88.0°F (2022) | 30.0°F (1917) | 2.00 in (1928) |
| March 24 | 86.0°F (1926) | 28.0°F (1949) | 1.60 in (1948) |
| March 25 | 88.0°F (2025) | 26.1°F (1949) | 1.16 in (2006) |
| March 26 | 87.1°F (2025) | 30.0°F (1920) | 1.14 in (1940) |
| March 27 | 86.0°F (1930) | 32.0°F (1936) | 1.91 in (1985) |
| March 28 | 82.9°F (1969) | 34.0°F (1901) | 1.59 in (1933) |
| March 29 | 88.0°F (2026) | 28.9°F (1897) | 0.92 in (2023) |
| March 30 | 88.0°F (2026) | 30.0°F (1897) | 3.28 in (1940) |
| March 31 | 88.0°F (2026) | 28.9°F (1917) | 2.54 in (1982) |