APRIL
| Date | Average High | Average Low | Record High | Record Low |
| 1 | 64 | 42 | 84 (1945) | 25 (1954) |
| 2 | 65 | 42 | 83 (1963) | 27(1980) |
| 3 | 65 | 43 | 84 (1986) | 25 (1987) |
| 4 | 62 | 41 | 81 (1978) | 26 (1987) |
| 5 | 62 | 42 | 85 (1967) | 27(2000) |
| 6 | 64 | 41 | 83 (1978) | 24(2007) |
| 7 | 67 | 41 | 85 (1959) | 22(2007) |
| 8 | 66 | 44 | 85 (1995) | 18(2007) |
| 9 | 65 | 44 | 85 (1978) | 25(2000) |
| 10 | 66 | 42 | 86 (1995) | 25 (1960) |
| 11 | 67 | 45 | 85 (1977) | 26(1989) |
| 12 | 67 | 47 | 85 (1977) | 29 (1975) |
| 13 | 67 | 46 | 86 (1977) | 27 (1950) |
| 14 | 67 | 46 | 86 (1992) | 28(1950) |
| 15 | 68 | 45 | 87 (1992) | 32 (1997) |
| 16 | 70 | 46 | 87 (1977) | 28 (1962) |
| 17 | 73 | 49 | 86 (1977) | 33 (1993) |
| 18 | 72 | 50 | 86 (2006) | 27(2001) |
| 19 | 71 | 50 | 89 (1971) | 28 (1953) |
| 20 | 73 | 49 | 90 (1987) | 29(1983) |
| 21 | 72 | 51 | 90 (1987) | 34 (1978) |
| 22 | 74 | 52 | 90 (1963) | 31 (2000) |
| 23 | 72 | 52 | 90 (1980) | 34(2003) |
| 24 | 72 | 50 | 89 (1965) | 32 (2005) |
| 25 | 72 | 49 | 88 (1989) | 35 (2005) |
| 26 | 73 | 50 | 90 (1989) | 34(2000) |
| 27 | 73 | 52 | 91 (1989) | 36 (2006) |
| 28 | 72 | 52 | 87 (1989) | 35 (1992) |
| 29 | 72 | 51 | 90 (1987) | 35 (1961) |
| 30 | 74 | 52 | 88 (2007) | 36 (1964) |
*Historical information provided by the office of Dr. Al Robertston, Southeast Missouri State University.
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