DECEMBER
| Date | Average High | Average Low | Record High | Record Low |
| 1 | 51 | 31 | 72 (1962) | 17 (2002) |
| 2 | 52 | 33 | 76 (1982) | 13 (1960) |
| 3 | 52 | 34 | 73 (1970) | 17 (1989) |
| 4 | 50 | 32 | 69 (1956) | 15 (2006) |
| 5 | 51 | 33 | 72 (1998) | 4 (2002) |
| 6 | 48 | 31 | 72 (1956) | -1 (2002) |
| 7 | 47 | 30 | 70 (1966) | 5 (1984) |
| 8 | 46 | 30 | 68 (1966) | 6 (2005) |
| 9 | 45 | 28 | 68 (1970) | -6 (2005) |
| 10 | 46 | 29 | 69 (1971) | -2 (1995) |
| 11 | 45 | 30 | 72 (1996) | 0 (1962) |
| 12 | 45 | 30 | 69 (1948) | -5 (1962) |
| 13 | 45 | 29 | 70 (1948) | -3 (1962) |
| 14 | 45 | 29 | 68 (1971) | 8 (1985) |
| 15 | 45 | 28 | 69 (1948) | 1 (1989) |
| 16 | 43 | 27 | 66 (1984) | -2 (1989) |
| 17 | 45 | 27 | 66 (1984) | 4 (2000) |
| 18 | 44 | 26 | 65 (1962) | 5 (1964) |
| 19 | 45 | 27 | 64 (1976) | 2 (1983) |
| 20 | 44 | 27 | 66 (1967) | 3 (2000) |
| 21 | 42 | 26 | 68 (1967) | -7 (1989) |
| 22 | 44 | 27 | 63 (1982) | -11 (1989) |
| 23 | 45 | 29 | 63 (1996) | -9 (1989) |
| 24 | 44 | 27 | 66 (1955) | -10 (1963) |
| 25 | 41 | 25 | 65 (1955) | -10 (2004) |
| 26 | 42 | 26 | 63 (1971) | 3 (1983) |
| 27 | 44 | 27 | 67 (1971) | 6(2004) |
| 28 | 43 | 27 | 69 (1984) | 7(2004) |
| 29 | 44 | 28 | 70 (1984) | -1(1983) |
| 30 | 43 | 28 | 67 (1951) | -5 (1983) |
| 31 | 43 | 28 | 66 (1951) | -2 (1976) |
*Historical information provided by the office of Dr. Al Robertston, Southeast Missouri State University.
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