January weather in San Joaquin, CA
The average temperature in San Joaquin in January is 48.2°F (37.7°F–58.6°F). Average precipitation: inches.
January is a winter month in San Joaquin, and is cooler than the annual average of 64.3°F. Daily temperatures swing about 20.9°F between overnight low and afternoon high. Daylight averages about 9h 46m. For travel, January is cool.
Avg High
58.6°F
Avg Low
37.7°F
Precipitation
in
Daylight
9h 46m
January records in San Joaquin
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 68.0°F (1997) | 21.0°F (2015) | 2.47 in (2006) |
| January 2 | 69.1°F (1958) | 18.0°F (1960) | 1.23 in (2011) |
| January 3 | 64.0°F (1954) | 21.9°F (1968) | 0.96 in (1987) |
| January 4 | 70.0°F (2018) | 18.0°F (1950) | 1.15 in (1995) |
| January 5 | 73.9°F (2018) | 18.0°F (1950) | 0.75 in (2008) |
| January 6 | 75.0°F (2022) | 19.9°F (1960) | 0.32 in (1993) |
| January 7 | 78.1°F (2022) | 19.9°F (1973) | 0.58 in (1952) |
| January 8 | 79.0°F (2022) | 21.9°F (1971) | 0.53 in (2001) |
| January 9 | 82.0°F (2022) | 24.1°F (1943) | 1.00 in (1995) |
| January 10 | 82.0°F (2022) | 19.9°F (1949) | 1.45 in (2023) |
| January 11 | 86.0°F (2019) | 19.0°F (1949) | 0.87 in (1980) |
| January 12 | 69.1°F (1980) | 21.0°F (1949) | 0.84 in (1990) |
| January 13 | 70.0°F (2000) | 18.0°F (2007) | 1.27 in (1993) |
| January 14 | 73.0°F (2022) | 21.0°F (2007) | 0.83 in (1969) |
| January 15 | 75.9°F (1974) | 21.0°F (2007) | 0.77 in (1979) |
| January 16 | 75.0°F (2022) | 21.9°F (1947) | 0.74 in (1970) |
| January 17 | 73.9°F (2014) | 21.9°F (1949) | 0.79 in (1988) |
| January 18 | 73.0°F (2021) | 21.0°F (2007) | 0.41 in (2017) |
| January 19 | 78.1°F (1981) | 18.0°F (1943) | 0.56 in (2016) |
| January 20 | 72.0°F (2014) | 21.9°F (1945) | 0.33 in (1982) |
| January 21 | 71.1°F (1950) | 21.0°F (1945) | 0.70 in (1969) |
| January 22 | 71.1°F (1981) | 19.0°F (1945) | 1.27 in (2008) |
| January 23 | 75.9°F (1970) | 14.0°F (1962) | 0.93 in (2008) |
| January 24 | 78.1°F (2014) | 18.0°F (1962) | 1.27 in (1995) |
| January 25 | 73.9°F (2014) | 24.1°F (1949) | 0.90 in (1969) |
| January 26 | 70.0°F (1959) | 21.9°F (1950) | 0.91 in (1961) |
| January 27 | 71.1°F (2014) | 25.0°F (1946) | 0.80 in (1983) |
| January 28 | 73.9°F (1986) | 24.1°F (2021) | 1.60 in (2021) |
| January 29 | 73.0°F (2014) | 19.9°F (1946) | 1.10 in (2021) |
| January 30 | 73.0°F (2024) | 18.0°F (1946) | 0.46 in (1966) |
| January 31 | 71.1°F (1953) | 21.0°F (1946) | 1.35 in (1996) |