December weather in Slidell, LA
The average temperature in Slidell in December is 53.5°F (44.1°F–63.0°F). Average precipitation: 4.95 inches.
December is a winter month in Slidell, and is cooler than the annual average of 67.6°F. Daily temperatures swing about 18.9°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 10h 3m. For travel, December is a comfortable month to visit.
Avg High
63.0°F
Avg Low
44.1°F
Precipitation
4.95 in
Daylight
10h 3m
December records in Slidell
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 81.0°F (1981) | 24.1°F (1976) | 1.57 in (1996) |
| December 2 | 82.9°F (1982) | 25.0°F (1960) | 4.76 in (2023) |
| December 3 | 79.0°F (1983) | 27.0°F (1974) | 4.32 in (1990) |
| December 4 | 81.0°F (1978) | 27.0°F (1974) | 4.17 in (1982) |
| December 5 | 86.0°F (1961) | 26.1°F (2006) | 3.25 in (2025) |
| December 6 | 81.0°F (1995) | 28.9°F (1974) | 1.74 in (2016) |
| December 7 | 80.1°F (1956) | 25.0°F (1984) | 1.58 in (1989) |
| December 8 | 82.0°F (2022) | 25.0°F (2006) | 4.51 in (2009) |
| December 9 | 81.0°F (1978) | 25.0°F (2010) | 2.11 in (2018) |
| December 10 | 80.1°F (1972) | 25.0°F (1978) | 3.01 in (1967) |
| December 11 | 79.0°F (1961) | 24.1°F (1973) | 3.42 in (2024) |
| December 12 | 79.0°F (2015) | 19.0°F (1957) | 2.56 in (1985) |
| December 13 | 80.1°F (1971) | 10.9°F (1962) | 3.30 in (2009) |
| December 14 | 79.0°F (1967) | 25.0°F (1962) | 2.15 in (1965) |
| December 15 | 78.1°F (1967) | 25.0°F (1985) | 2.16 in (2022) |
| December 16 | 79.0°F (1971) | 21.9°F (1958) | 4.68 in (1992) |
| December 17 | 79.0°F (2015) | 21.9°F (1958) | 0.93 in (1966) |
| December 18 | 78.1°F (1956) | 21.9°F (1979) | 3.03 in (2017) |
| December 19 | 81.0°F (1967) | 19.0°F (1975) | 2.33 in (1965) |
| December 20 | 79.0°F (2025) | 19.0°F (1996) | 2.85 in (1971) |
| December 21 | 80.1°F (1967) | 23.0°F (1973) | 3.35 in (1972) |
| December 22 | 82.0°F (1970) | 12.9°F (1989) | 3.81 in (2006) |
| December 23 | 81.0°F (1970) | 9.0°F (1989) | 3.22 in (1956) |
| December 24 | 79.0°F (1982) | 10.0°F (1989) | 2.25 in (2020) |
| December 25 | 80.1°F (1964) | 12.0°F (1983) | 2.07 in (2023) |
| December 26 | 78.1°F (1971) | 17.1°F (1983) | 2.55 in (1973) |
| December 27 | 79.0°F (2025) | 23.0°F (2010) | 1.51 in (1983) |
| December 28 | 79.0°F (1984) | 24.1°F (2010) | 3.68 in (1983) |
| December 29 | 79.0°F (1974) | 21.9°F (1983) | 1.84 in (1975) |
| December 30 | 80.1°F (1964) | 17.1°F (1983) | 2.71 in (1977) |
| December 31 | 79.0°F (1974) | 17.1°F (1983) | 3.00 in (2006) |