March weather in St. Helena, CA
The average temperature in St. Helena in March is 55.4°F (43.9°F–66.8°F). Average precipitation: 4.98 inches.
March is a spring month in St. Helena, and is cooler than the annual average of 61°F. Daily temperatures swing about 22.9°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
66.8°F
Avg Low
43.9°F
Precipitation
4.98 in
Daylight
11h 45m
March records in St. Helena
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| March 1 | 82.0°F (1936) | 27.0°F (1971) | 1.60 in (1989) |
| March 2 | 82.0°F (1936) | 26.1°F (1971) | 2.40 in (1991) |
| March 3 | 84.9°F (1929) | 24.1°F (1951) | 3.70 in (1991) |
| March 4 | 82.0°F (2020) | 27.0°F (1966) | 2.13 in (1944) |
| March 5 | 81.0°F (1972) | 24.1°F (1971) | 2.60 in (2016) |
| March 6 | 81.0°F (1913) | 26.1°F (1971) | 2.83 in (1935) |
| March 7 | 82.0°F (1914) | 28.0°F (1945) | 3.90 in (1911) |
| March 8 | 82.9°F (1934) | 28.9°F (1964) | 1.25 in (1939) |
| March 9 | 84.9°F (1934) | 27.0°F (1935) | 6.40 in (1995) |
| March 10 | 88.0°F (1934) | 27.0°F (1951) | 2.10 in (2023) |
| March 11 | 88.0°F (2005) | 27.0°F (1969) | 1.84 in (1931) |
| March 12 | 87.1°F (2005) | 24.1°F (1919) | 4.08 in (1983) |
| March 13 | 84.0°F (2004) | 28.0°F (1954) | 2.10 in (2012) |
| March 14 | 84.9°F (1916) | 27.0°F (1977) | 2.20 in (2012) |
| March 15 | 84.9°F (2004) | 28.0°F (1944) | 1.66 in (2003) |
| March 16 | 91.0°F (1914) | 30.0°F (1935) | 1.60 in (2018) |
| March 17 | 95.0°F (1914) | 27.0°F (1955) | 1.44 in (1989) |
| March 18 | 90.0°F (1914) | 28.9°F (1935) | 1.33 in (1918) |
| March 19 | 88.0°F (1914) | 28.9°F (1935) | 2.82 in (1953) |
| March 20 | 84.0°F (1960) | 28.0°F (1952) | 2.00 in (2011) |
| March 21 | 82.9°F (1915) | 28.9°F (1952) | 2.69 in (1975) |
| March 22 | 86.0°F (2022) | 28.9°F (1935) | 1.56 in (1995) |
| March 23 | 87.1°F (2022) | 30.0°F (1924) | 2.69 in (1948) |
| March 24 | 87.1°F (1926) | 27.0°F (1924) | 1.84 in (2011) |
| March 25 | 84.0°F (1952) | 28.0°F (1929) | 1.40 in (1999) |
| March 26 | 86.0°F (1923) | 28.0°F (1913) | 2.24 in (1985) |
| March 27 | 87.1°F (1923) | 28.9°F (1914) | 2.74 in (1915) |
| March 28 | 86.0°F (2015) | 30.0°F (1972) | 2.00 in (2006) |
| March 29 | 89.1°F (2018) | 30.9°F (1924) | 1.96 in (1940) |
| March 30 | 86.0°F (1932) | 30.0°F (1924) | 5.05 in (1982) |
| March 31 | 90.0°F (1966) | 28.9°F (1938) | 1.37 in (1927) |