December weather in Bay St. Louis, MS
The average temperature in Bay St. Louis in December is 52.2°F (43.2°F–61.3°F). Average precipitation: 4.40 inches.
December is a winter month in Bay St. Louis, and is cooler than the annual average of 67°F. Daily temperatures swing about 18.1°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 10h 3m. For travel, December is a comfortable month to visit.
Avg High
61.3°F
Avg Low
43.2°F
Precipitation
4.40 in
Daylight
10h 3m
December records in Bay St. Louis
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 77.0°F (2018) | 25.0°F (1988) | 2.25 in (2025) |
| December 2 | 81.0°F (1985) | 28.0°F (1988) | 2.50 in (2023) |
| December 3 | 77.0°F (1982) | 28.0°F (1988) | 1.10 in (1990) |
| December 4 | 75.9°F (1983) | 26.1°F (2006) | 3.15 in (1982) |
| December 5 | 78.1°F (1998) | 25.0°F (2006) | 1.45 in (1984) |
| December 6 | 79.0°F (1995) | 27.0°F (2006) | 2.32 in (2016) |
| December 7 | 79.0°F (1998) | 24.1°F (1984) | 3.10 in (1989) |
| December 8 | 79.0°F (1998) | 24.1°F (1984) | 1.61 in (1987) |
| December 9 | 80.1°F (1998) | 27.0°F (1984) | 2.06 in (2018) |
| December 10 | 78.1°F (1986) | 25.0°F (1995) | 0.68 in (2024) |
| December 11 | 79.0°F (1992) | 25.0°F (1995) | 1.15 in (1983) |
| December 12 | 75.0°F (1983) | 28.0°F (1995) | 1.50 in (1982) |
| December 13 | 77.0°F (1996) | 26.1°F (1989) | 4.49 in (2009) |
| December 14 | 75.9°F (1991) | 25.0°F (1988) | 1.56 in (2018) |
| December 15 | 73.9°F (1995) | 23.0°F (1985) | 2.18 in (2009) |
| December 16 | 73.9°F (2019) | 21.9°F (1985) | 1.27 in (1992) |
| December 17 | 75.0°F (2011) | 23.0°F (1985) | 2.77 in (1992) |
| December 18 | 72.0°F (1984) | 21.0°F (1988) | 4.36 in (1995) |
| December 19 | 71.1°F (1990) | 24.1°F (1988) | 0.91 in (2016) |
| December 20 | 78.1°F (2008) | 19.0°F (1996) | 2.50 in (2014) |
| December 21 | 73.9°F (1988) | 19.0°F (1996) | 1.44 in (1999) |
| December 22 | 73.0°F (1990) | 21.9°F (1989) | 5.75 in (2006) |
| December 23 | 75.0°F (2002) | 8.1°F (1989) | 1.64 in (2015) |
| December 24 | 78.1°F (2015) | 9.0°F (1989) | 2.12 in (2023) |
| December 25 | 75.9°F (2008) | 10.0°F (1989) | 1.80 in (2015) |
| December 26 | 73.0°F (2002) | 12.0°F (1983) | 0.56 in (2010) |
| December 27 | 71.1°F (1982) | 15.1°F (1985) | 1.05 in (1996) |
| December 28 | 73.0°F (1982) | 24.1°F (2010) | 2.11 in (2024) |
| December 29 | 75.0°F (2016) | 26.1°F (2010) | 1.18 in (1994) |
| December 30 | 73.0°F (2016) | 16.0°F (1983) | 2.62 in (2015) |
| December 31 | 75.0°F (1984) | 14.0°F (1983) | 3.29 in (2006) |