January weather in Hillsborough, CA
The average temperature in Hillsborough in January is 51.3°F (44.5°F–58.0°F). Average precipitation: 3.89 inches.
January is a winter month in Hillsborough, and is cooler than the annual average of 58.7°F. Daily temperatures swing about 13.5°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 9h 41m. For travel, January is a comfortable month to visit.
Avg High
58.0°F
Avg Low
44.5°F
Precipitation
3.89 in
Daylight
9h 41m
January records in Hillsborough
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 68.0°F (1996) | 30.9°F (1952) | 2.16 in (2004) |
| January 2 | 69.1°F (1996) | 28.9°F (1960) | 1.67 in (1977) |
| January 3 | 69.1°F (2000) | 30.9°F (1950) | 1.33 in (1974) |
| January 4 | 66.0°F (2014) | 28.9°F (1949) | 5.59 in (1982) |
| January 5 | 66.0°F (2014) | 26.1°F (1949) | 1.98 in (1959) |
| January 6 | 66.0°F (2003) | 28.9°F (1950) | 2.34 in (1993) |
| January 7 | 66.0°F (2019) | 30.9°F (1950) | 0.87 in (1956) |
| January 8 | 70.0°F (1962) | 30.0°F (1955) | 3.12 in (2018) |
| January 9 | 71.1°F (1962) | 33.1°F (1957) | 1.40 in (2023) |
| January 10 | 68.0°F (1953) | 28.9°F (1949) | 1.82 in (2017) |
| January 11 | 69.1°F (1959) | 30.0°F (1949) | 1.30 in (1980) |
| January 12 | 70.0°F (2009) | 32.0°F (1949) | 1.56 in (1993) |
| January 13 | 72.0°F (2009) | 28.9°F (1963) | 1.97 in (1993) |
| January 14 | 72.0°F (2014) | 30.9°F (1963) | 2.21 in (1979) |
| January 15 | 73.0°F (2014) | 30.9°F (1963) | 1.03 in (1956) |
| January 16 | 73.0°F (2014) | 30.9°F (1962) | 1.84 in (1973) |
| January 17 | 73.9°F (2021) | 32.0°F (1947) | 1.06 in (1973) |
| January 18 | 73.9°F (2021) | 30.0°F (1947) | 1.82 in (1969) |
| January 19 | 68.0°F (1976) | 35.1°F (1961) | 1.52 in (2010) |
| January 20 | 66.9°F (1976) | 30.0°F (1963) | 2.49 in (1964) |
| January 21 | 68.0°F (2014) | 30.0°F (1962) | 4.07 in (1967) |
| January 22 | 71.1°F (1968) | 32.0°F (1962) | 1.55 in (1983) |
| January 23 | 71.1°F (1948) | 30.9°F (1949) | 1.30 in (2000) |
| January 24 | 72.0°F (1948) | 30.9°F (1962) | 1.72 in (2000) |
| January 25 | 69.1°F (2023) | 30.9°F (1949) | 2.54 in (2008) |
| January 26 | 68.0°F (2023) | 30.0°F (1949) | 1.52 in (1983) |
| January 27 | 68.0°F (1984) | 30.9°F (1949) | 1.65 in (1981) |
| January 28 | 69.1°F (1984) | 33.1°F (1948) | 1.04 in (1981) |
| January 29 | 66.0°F (1962) | 30.9°F (1979) | 1.57 in (1968) |
| January 30 | 71.1°F (1976) | 30.0°F (1975) | 1.91 in (1963) |
| January 31 | 73.9°F (2015) | 32.0°F (1946) | 1.99 in (1963) |