January weather in St. Helena, CA
The average temperature in St. Helena in January is 49.5°F (40.2°F–58.8°F). Average precipitation: 6.47 inches.
January is a winter month in St. Helena, and is cooler than the annual average of 61°F. Daily temperatures swing about 18.6°F between overnight low and afternoon high. Expect about 13 days with precipitation. Daylight averages about 9h 36m. For travel, January is a wet month.
Avg High
58.8°F
Avg Low
40.2°F
Precipitation
6.47 in
Daylight
9h 36m
January records in St. Helena
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 70.0°F (2001) | 21.0°F (1919) | 3.90 in (1997) |
| January 2 | 77.0°F (1996) | 16.0°F (1924) | 2.08 in (2002) |
| January 3 | 79.0°F (1996) | 21.0°F (1950) | 5.28 in (1916) |
| January 4 | 73.0°F (2001) | 21.0°F (1950) | 4.10 in (2008) |
| January 5 | 75.0°F (1911) | 19.0°F (1949) | 4.07 in (1965) |
| January 6 | 80.1°F (1911) | 19.9°F (1950) | 1.80 in (1915) |
| January 7 | 75.9°F (2015) | 19.9°F (1937) | 1.86 in (1956) |
| January 8 | 82.9°F (1962) | 26.1°F (1930) | 3.29 in (2017) |
| January 9 | 80.1°F (1962) | 16.0°F (1937) | 3.02 in (1995) |
| January 10 | 75.9°F (1932) | 23.0°F (1930) | 3.21 in (2017) |
| January 11 | 72.0°F (1996) | 25.0°F (1929) | 3.92 in (1979) |
| January 12 | 79.0°F (2009) | 21.9°F (1984) | 2.58 in (1973) |
| January 13 | 75.9°F (2009) | 21.0°F (1963) | 2.57 in (1969) |
| January 14 | 80.1°F (2014) | 21.9°F (1949) | 3.00 in (1909) |
| January 15 | 81.0°F (2014) | 21.9°F (1949) | 3.30 in (1909) |
| January 16 | 79.0°F (2014) | 24.1°F (1947) | 3.51 in (1954) |
| January 17 | 78.1°F (1991) | 23.0°F (1928) | 3.10 in (1921) |
| January 18 | 78.1°F (1944) | 21.9°F (1928) | 2.28 in (1973) |
| January 19 | 75.9°F (1976) | 21.0°F (1943) | 2.29 in (1969) |
| January 20 | 75.9°F (2014) | 18.0°F (1922) | 2.96 in (1943) |
| January 21 | 77.0°F (2014) | 19.9°F (1922) | 6.83 in (1967) |
| January 22 | 79.0°F (1968) | 19.0°F (1937) | 1.37 in (1909) |
| January 23 | 82.0°F (1948) | 21.9°F (1922) | 3.22 in (1997) |
| January 24 | 77.0°F (1918) | 24.1°F (1962) | 2.55 in (1910) |
| January 25 | 77.0°F (1934) | 23.0°F (1937) | 2.54 in (1940) |
| January 26 | 75.0°F (1934) | 21.9°F (1949) | 3.75 in (1983) |
| January 27 | 77.0°F (1984) | -9.0°F (2002) | 2.04 in (1996) |
| January 28 | 78.1°F (1984) | 21.0°F (1948) | 1.88 in (1926) |
| January 29 | 77.0°F (1931) | 24.1°F (1969) | 4.07 in (1968) |
| January 30 | 77.0°F (1962) | 21.0°F (1975) | 3.53 in (1963) |
| January 31 | 80.1°F (2015) | 24.1°F (1946) | 4.63 in (1963) |