December weather in Tustin, CA
The average temperature in Tustin in December is 58.2°F (48.1°F–68.4°F). Average precipitation: 2.16 inches.
December is a winter month in Tustin, and is cooler than the annual average of 66.1°F. Daily temperatures swing about 20.3°F between overnight low and afternoon high. Expect about 6 days with precipitation. Daylight averages about 9h 46m. For travel, December is a comfortable month to visit.
Avg High
68.4°F
Avg Low
48.1°F
Precipitation
2.16 in
Daylight
9h 46m
December records in Tustin
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 91.9°F (1959) | 30.0°F (1918) | 1.37 in (1909) |
| December 2 | 90.0°F (1958) | 30.9°F (1936) | 1.32 in (1961) |
| December 3 | 95.0°F (1958) | 30.0°F (1919) | 2.38 in (1966) |
| December 4 | 91.9°F (1979) | 30.0°F (1948) | 2.75 in (1974) |
| December 5 | 89.1°F (1979) | 28.0°F (1948) | 2.56 in (1966) |
| December 6 | 88.0°F (1938) | 28.0°F (1929) | 3.47 in (1997) |
| December 7 | 87.1°F (1938) | 33.1°F (1919) | 2.00 in (1992) |
| December 8 | 88.0°F (1938) | 32.0°F (1951) | 0.65 in (1984) |
| December 9 | 90.0°F (1938) | 0.0°F (1998) | 1.95 in (1909) |
| December 10 | 89.1°F (1950) | 25.0°F (1998) | 1.90 in (1941) |
| December 11 | 88.0°F (1958) | 27.0°F (1949) | 1.78 in (1996) |
| December 12 | 90.0°F (2010) | 25.0°F (1949) | 1.45 in (1914) |
| December 13 | 87.1°F (1953) | 26.1°F (1949) | 1.20 in (1933) |
| December 14 | 91.9°F (1953) | 28.0°F (1945) | 1.63 in (2021) |
| December 15 | 88.0°F (1942) | 17.1°F (1996) | 2.05 in (2008) |
| December 16 | 89.1°F (1980) | 28.9°F (1935) | 1.63 in (1938) |
| December 17 | 84.9°F (1950) | 28.9°F (1931) | 1.04 in (1940) |
| December 18 | 87.1°F (1917) | 28.9°F (1935) | 3.01 in (1938) |
| December 19 | 84.9°F (1929) | 28.9°F (1930) | 1.70 in (1921) |
| December 20 | 86.0°F (1954) | 28.9°F (1949) | 1.65 in (1938) |
| December 21 | 82.9°F (2020) | 24.1°F (1988) | 1.84 in (1921) |
| December 22 | 86.0°F (1960) | 28.0°F (1949) | 3.72 in (1945) |
| December 23 | 86.0°F (1989) | 30.0°F (1918) | 0.98 in (2019) |
| December 24 | 84.9°F (1950) | 27.0°F (1948) | 3.42 in (1940) |
| December 25 | 86.0°F (1947) | 27.0°F (1948) | 1.21 in (1988) |
| December 26 | 86.0°F (1947) | 24.1°F (1918) | 1.75 in (2019) |
| December 27 | 89.1°F (1956) | 26.1°F (1924) | 1.62 in (1923) |
| December 28 | 88.0°F (1956) | 28.0°F (1926) | 1.74 in (1936) |
| December 29 | 89.1°F (1980) | 27.0°F (1930) | 1.71 in (1965) |
| December 30 | 90.0°F (1929) | 26.1°F (1918) | 1.99 in (1951) |
| December 31 | 84.0°F (1963) | 21.9°F (1918) | 1.76 in (1933) |