January weather in Mermentau, LA
The average temperature in Mermentau in January is 50.9°F (41.6°F–60.1°F). Average precipitation: 6.29 inches.
January is a winter month in Mermentau, and is cooler than the annual average of 67.8°F. Daily temperatures swing about 18.5°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 10h 15m. For travel, January is a wet month.
Avg High
60.1°F
Avg Low
41.6°F
Precipitation
6.29 in
Daylight
10h 15m
January records in Mermentau
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 82.0°F (1952) | 18.0°F (1984) | 4.14 in (2017) |
| January 2 | 82.0°F (1917) | 18.0°F (1928) | 2.33 in (1999) |
| January 3 | 79.0°F (1907) | 18.0°F (1979) | 3.69 in (2020) |
| January 4 | 80.1°F (1922) | 17.1°F (1911) | 4.54 in (1931) |
| January 5 | 80.1°F (1917) | 17.1°F (1911) | 5.65 in (1899) |
| January 6 | 79.0°F (1937) | 17.1°F (1924) | 2.79 in (1899) |
| January 7 | 80.1°F (1916) | 19.0°F (1924) | 3.96 in (1998) |
| January 8 | 82.9°F (1898) | 21.0°F (1942) | 2.50 in (1992) |
| January 9 | 81.0°F (1937) | 19.9°F (2010) | 2.79 in (1992) |
| January 10 | 81.0°F (1950) | 12.9°F (1962) | 8.64 in (2013) |
| January 11 | 81.0°F (1898) | 10.9°F (1962) | 3.02 in (1991) |
| January 12 | 79.0°F (1907) | 10.0°F (1918) | 3.22 in (1998) |
| January 13 | 81.0°F (1907) | 12.0°F (1918) | 3.90 in (1947) |
| January 14 | 80.1°F (1907) | 16.0°F (1964) | 3.03 in (1977) |
| January 15 | 80.1°F (1907) | 19.9°F (1905) | 2.00 in (1899) |
| January 16 | 80.1°F (1935) | 17.1°F (2024) | 1.89 in (1925) |
| January 17 | 81.0°F (1907) | 16.0°F (2018) | 2.25 in (2001) |
| January 18 | 82.0°F (1950) | 16.0°F (1930) | 4.46 in (1898) |
| January 19 | 80.1°F (1935) | 14.0°F (1940) | 3.89 in (1989) |
| January 20 | 81.0°F (1952) | 17.1°F (1940) | 3.91 in (1993) |
| January 21 | 81.0°F (1927) | 15.1°F (1985) | 3.65 in (1930) |
| January 22 | 82.0°F (1920) | 7.0°F (2025) | 4.26 in (1916) |
| January 23 | 80.1°F (1927) | 9.0°F (2025) | 4.20 in (1932) |
| January 24 | 80.1°F (1909) | 12.9°F (1948) | 2.90 in (1920) |
| January 25 | 80.1°F (1909) | 19.0°F (1963) | 3.25 in (1990) |
| January 26 | 82.9°F (1911) | 17.1°F (1940) | 3.02 in (1962) |
| January 27 | 80.1°F (1952) | 16.0°F (1940) | 3.70 in (1950) |
| January 28 | 80.1°F (1911) | 21.9°F (1940) | 2.58 in (2018) |
| January 29 | 79.0°F (1916) | 23.0°F (1961) | 2.03 in (1990) |
| January 30 | 82.0°F (1927) | 19.0°F (1966) | 4.50 in (1959) |
| January 31 | 81.0°F (1950) | 18.0°F (1949) | 2.51 in (1934) |