December weather in Port Lavaca, TX
The average temperature in Port Lavaca in December is 57.3°F (48.0°F–66.7°F). Average precipitation: 2.92 inches.
December is a winter month in Port Lavaca, and is cooler than the annual average of 71.3°F. Daily temperatures swing about 18.7°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 10h 11m. For travel, December is a comfortable month to visit.
Avg High
66.7°F
Avg Low
48.0°F
Precipitation
2.92 in
Daylight
10h 11m
December records in Port Lavaca
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 81.0°F (2010) | 30.0°F (1979) | 0.52 in (2023) |
| December 2 | 80.1°F (1978) | 33.1°F (1985) | 1.27 in (1994) |
| December 3 | 82.9°F (1964) | 35.1°F (2006) | 1.39 in (1965) |
| December 4 | 82.9°F (1995) | 33.1°F (1978) | 1.92 in (2016) |
| December 5 | 82.9°F (1977) | 32.0°F (2009) | 2.59 in (1960) |
| December 6 | 82.9°F (1966) | 28.9°F (1964) | 1.20 in (2017) |
| December 7 | 82.0°F (1966) | 28.0°F (2009) | 0.86 in (1981) |
| December 8 | 81.0°F (2012) | 30.0°F (1964) | 4.70 in (2018) |
| December 9 | 81.0°F (1961) | 28.9°F (1978) | 1.79 in (1991) |
| December 10 | 81.0°F (1993) | 24.1°F (1978) | 1.58 in (1964) |
| December 11 | 86.0°F (1983) | 30.0°F (1966) | 1.33 in (1985) |
| December 12 | 81.0°F (1981) | 25.0°F (1957) | 2.25 in (1979) |
| December 13 | 82.0°F (1981) | 27.0°F (1966) | 0.81 in (2003) |
| December 14 | 79.0°F (1975) | 27.0°F (1985) | 1.68 in (1963) |
| December 15 | 81.0°F (1957) | 30.9°F (1985) | 1.09 in (1996) |
| December 16 | 80.1°F (1971) | 25.0°F (1972) | 1.09 in (1966) |
| December 17 | 79.0°F (2006) | 28.0°F (1972) | 6.10 in (1995) |
| December 18 | 78.1°F (1995) | 28.9°F (1979) | 1.32 in (1993) |
| December 19 | 82.0°F (1977) | 25.0°F (1996) | 1.25 in (1976) |
| December 20 | 79.0°F (1988) | 21.9°F (1973) | 1.49 in (1958) |
| December 21 | 81.0°F (2007) | 28.9°F (1976) | 1.43 in (1991) |
| December 22 | 81.0°F (1966) | 18.0°F (1989) | 3.61 in (1991) |
| December 23 | 79.0°F (2025) | 9.0°F (1989) | 1.00 in (2006) |
| December 24 | 82.9°F (1964) | 16.0°F (1989) | 3.50 in (1975) |
| December 25 | 86.0°F (1964) | 12.9°F (1983) | 2.59 in (1974) |
| December 26 | 79.0°F (2012) | 19.9°F (1983) | 1.12 in (1991) |
| December 27 | 82.9°F (1968) | 28.9°F (1983) | 2.43 in (1960) |
| December 28 | 81.0°F (2025) | 21.0°F (1999) | 1.05 in (1994) |
| December 29 | 82.0°F (2025) | 21.9°F (1983) | 2.50 in (1978) |
| December 30 | 82.0°F (2025) | 18.0°F (1983) | 1.65 in (1958) |
| December 31 | 82.0°F (1964) | 23.0°F (1983) | 3.07 in (2020) |