December Normals and Extremes for Muscle Shoals
| Date | Record Max | Normals | Record Min |
|---|---|---|---|
| Dec 01 | 72 / 1941 | 56.9 | 36.8 | 0.20 | 14 / 1929 |
| Dec 02 | 74 / 1991* | 56.6 | 36.5 | 0.20 | 18 / 1960 |
| Dec 03 | 76 / 1978 | 56.2 | 36.3 | 0.20 | 9 / 1929 |
| Dec 04 | 76 / 1998 | 55.8 | 36.0 | 0.20 | 10 / 1929 |
| Dec 05 | 78 / 1933 | 55.5 | 35.8 | 0.19 | 17 / 1935 |
| Dec 06 | 76 / 1998 | 55.1 | 35.6 | 0.21 | 15 / 1937 |
| Dec 07 | 78 / 1998* | 54.8 | 35.3 | 0.20 | 10 / 1937 |
| Dec 08 | 76 / 1978 | 54.5 | 35.1 | 0.21 | 15 / 2006 |
| Dec 09 | 76 / 2007* | 54.2 | 34.9 | 0.20 | 5 / 1937 |
| Dec 10 | 77 / 2007 | 53.9 | 34.7 | 0.22 | 8 / 1937 |
| Dec 11 | 77 / 2007 | 53.6 | 34.5 | 0.21 | 5 / 1937 |
| Dec 12 | 75 / 1931 | 53.3 | 34.3 | 0.20 | 2 / 1962 |
| Dec 13 | 76 / 1927 | 53.1 | 34.1 | 0.20 | 2 / 1962 |
| Dec 14 | 74 / 1984* | 52.8 | 33.9 | 0.21 | 12 / 1962* |
| Dec 15 | 74 / 1948* | 52.6 | 33.7 | 0.19 | 0 / 1901 |
| Dec 16 | 76 / 1933 | 52.3 | 33.6 | 0.19 | 0 / 1914 |
| Dec 17 | 75 / 1933 | 52.1 | 33.4 | 0.18 | 1 / 1914 |
| Dec 18 | 74 / 1924 | 51.9 | 33.2 | 0.18 | 5 / 1901 |
| Dec 19 | 75 / 1924 | 51.7 | 33.1 | 0.17 | 9 / 1963 |
| Dec 20 | 72 / 1978 | 51.5 | 32.9 | 0.17 | 1 / 1901 |
| Dec 21 | 74 / 1967 | 51.4 | 32.8 | 0.17 | 5 / 1989 |
| Dec 22 | 71 / 1998 | 51.2 | 32.7 | 0.18 | -3 / 1989 |
| Dec 23 | 74 / 1970 | 51.1 | 32.5 | 0.16 | -5 / 1989 |
| Dec 24 | 78 / 1964* | 50.9 | 32.4 | 0.17 | 2 / 1989 |
| Dec 25 | 75 / 1987* | 50.8 | 32.3 | 0.16 | 1 / 1983 |
| Dec 26 | 73 / 1971 | 50.7 | 32.2 | 0.16 | 3 / 1983 |
| Dec 27 | 75 / 2008* | 50.6 | 32.1 | 0.15 | 10 / 1935* |
| Dec 28 | 75 / 1907 | 50.5 | 31.9 | 0.15 | 5 / 1925 |
| Dec 29 | 71 / 1996* | 50.4 | 31.8 | 0.15 | 5 / 1925 |
| Dec 30 | 75 / 1984 | 50.4 | 31.8 | 0.15 | 5 / 1983* |
| Dec 31 | 78 / 1951 | 50.3 | 31.7 | 0.15 | 10 / 1983 |
* indicates record also set in previous years