| April | |||||||
| Day | Normal High | Normal Low | Normal Mean | Normal Precip | Normal Snow | Record High | Record Low |
| 1 | 53 | 35 | 44 | 0.12 | 0.2 | 83 in 2010 | 10 in 1964 |
| 2 | 54 | 36 | 45 | 0.12 | 0.3 | 86 in 2010 | 19 in 1883 |
| 3 | 54 | 36 | 45 | 0.12 | 0.2 | 83 in 2010 | 19 in 1954 |
| 4 | 54 | 37 | 45.5 | 0.12 | 0.2 | 77 in 1882 | 19 in 1971 |
| 5 | 55 | 37 | 46 | 0.11 | 0.2 | 81 in 1988 | 16 in 1881 |
| 6 | 55 | 37 | 46 | 0.12 | 0.2 | 85 in 2010 | 21 in 1982 |
| 7 | 56 | 38 | 47 | 0.13 | 0.2 | 83 in 1929 | 17 in 1982 |
| 8 | 56 | 38 | 47 | 0.12 | 0.1 | 80 in 2001 | 11 in 1982 |
| 9 | 57 | 38 | 47.5 | 0.13 | 0.2 | 81 in 1931 | 17 in 1972 |
| 10 | 57 | 39 | 48 | 0.12 | 0.1 | 83 in 1978 | 20 in 1997 |
| 11 | 57 | 39 | 48 | 0.13 | 0.2 | 82 in 1945 | 22 in 1882 |
| 12 | 58 | 39 | 48.5 | 0.13 | 0.1 | 82 in 2001 | 20 in 1939 |
| 13 | 58 | 40 | 49 | 0.12 | 0.2 | 83 in 1941 | 20 in 1950 |
| 14 | 59 | 40 | 49.5 | 0.12 | 0.1 | 85 in 1883 | 20 in 1950 |
| 15 | 59 | 40 | 49.5 | 0.12 | 0.1 | 84 in 2010 | 22 in 1935 |
| 16 | 59 | 41 | 50 | 0.12 | 0.1 | 85 in 2002 | 18 in 1875 |
| 17 | 60 | 41 | 50.5 | 0.12 | 0.1 | 84 in 1896 | 15 in 1875 |
| 18 | 60 | 41 | 50.5 | 0.11 | 0.1 | 85 in 1896 | 17 in 1875 |
| 19 | 61 | 42 | 51.5 | 0.12 | 0.1 | 84 in 1958 | 22 in 1887 |
| 20 | 61 | 42 | 51.5 | 0.11 | 0 | 83 in 1985 | 23 in 1904 |
| 21 | 61 | 42 | 51.5 | 0.12 | 0.1 | 86 in 1952 | 24 in 1875 |
| 22 | 62 | 43 | 52.5 | 0.11 | 0 | 84 in 1985 | 23 in 1875 |
| 23 | 62 | 43 | 52.5 | 0.11 | 0 | 86 in 1985 | 27 in 1994 |
| 24 | 63 | 43 | 53 | 0.11 | 0.1 | 88 in 1925 | 28 in 2003 |
| 25 | 63 | 44 | 53.5 | 0.1 | 0 | 87 in 1990 | 27 in 1888 |
| 26 | 63 | 44 | 53.5 | 0.11 | 0 | 87 in 1948 | 26 in 1972 |
| 27 | 64 | 44 | 54 | 0.1 | 0 | 86 in 1990 | 27 in 1971 |
| 28 | 64 | 45 | 54.5 | 0.11 | 0.1 | 88 in 1986 | 25 in 1947 |
| 29 | 64 | 45 | 54.5 | 0.1 | 0 | 84 in 1899 | 25 in 1977 |
| 30 | 65 | 45 | 55 | 0.11 | 0 | 88 in 1942 | 28 in 1969 |
| 60.1 | 40.5 | 49.8 | 3.49 | 3.3 | |||