January weather in Portola, CA
The average temperature in Portola in January is 31.1°F (19.3°F–43.0°F). Average precipitation: 4.16 inches. Average snowfall is 11.7 inches.
January is a winter month in Portola, and is cooler than the annual average of 46.7°F. Daily temperatures swing about 23.7°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 9h 28m. For travel, January is cold.
Avg High
43.0°F
Avg Low
19.3°F
Precipitation
4.16 in
Snow
11.7 in
January records in Portola
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 60.1°F (1920) | -24.0°F (1924) | 2.72 in (2023) |
| January 2 | 62.1°F (2012) | -14.1°F (1966) | 1.30 in (1916) |
| January 3 | 60.1°F (2012) | -18.0°F (1950) | 1.38 in (1987) |
| January 4 | 64.0°F (2012) | -22.0°F (1971) | 1.51 in (2017) |
| January 5 | 64.0°F (1920) | -15.0°F (1993) | 2.53 in (2008) |
| January 6 | 59.0°F (2006) | -8.0°F (1993) | 1.44 in (1965) |
| January 7 | 61.0°F (1996) | -4.0°F (1924) | 1.60 in (2005) |
| January 8 | 60.1°F (1962) | -13.0°F (1930) | 1.94 in (2017) |
| January 9 | 62.1°F (1990) | -11.0°F (1957) | 2.05 in (2017) |
| January 10 | 66.0°F (1961) | -11.9°F (1949) | 2.44 in (2017) |
| January 11 | 60.1°F (1918) | -18.9°F (1916) | 2.07 in (2017) |
| January 12 | 64.0°F (1920) | -18.0°F (1916) | 2.30 in (1952) |
| January 13 | 62.1°F (1918) | -13.0°F (2013) | 1.70 in (1980) |
| January 14 | 64.0°F (1920) | -9.9°F (1950) | 2.30 in (1970) |
| January 15 | 61.0°F (1918) | -18.9°F (1950) | 2.00 in (1952) |
| January 16 | 64.9°F (1923) | -11.0°F (1917) | 1.64 in (2000) |
| January 17 | 63.0°F (1961) | -5.1°F (1955) | 1.70 in (1954) |
| January 18 | 62.1°F (1920) | -15.0°F (1952) | 1.04 in (1951) |
| January 19 | 60.1°F (1919) | -22.0°F (1937) | 1.29 in (1998) |
| January 20 | 64.0°F (1920) | -18.9°F (1916) | 1.83 in (1999) |
| January 21 | 64.0°F (1918) | -15.0°F (1937) | 3.57 in (1967) |
| January 22 | 62.1°F (1920) | -18.0°F (1962) | 1.56 in (1967) |
| January 23 | 64.0°F (1920) | -13.0°F (1937) | 2.15 in (1997) |
| January 24 | 64.0°F (1918) | -9.9°F (1949) | 1.40 in (2000) |
| January 25 | 71.1°F (1923) | -9.9°F (1950) | 1.86 in (2000) |
| January 26 | 66.9°F (1923) | -7.1°F (1957) | 2.28 in (1997) |
| January 27 | 64.0°F (1934) | -18.0°F (1922) | 1.54 in (1981) |
| January 28 | 66.9°F (2024) | -7.1°F (1922) | 2.00 in (1926) |
| January 29 | 66.9°F (2024) | -9.0°F (1956) | 1.22 in (1967) |
| January 30 | 68.0°F (1920) | -20.0°F (1923) | 1.69 in (1963) |
| January 31 | 64.0°F (1920) | -20.0°F (1916) | 1.80 in (1932) |